TY  - JOUR
AU  - Silin, Ivan
AU  - Dertmann, Christian
AU  - Cvetković, Vesna S.
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7432
AB  - This work includes a combined hydrometallurgical treatment of a eudialyte ore sample
with a subsequent preparation of leaching residue using mechanical separation methods. Hydrometallurgical treatment contains dry digestion with sulphuric acid at room temperature and filtration of the obtained product. The objectives of adopting these procedures are to test a new digestion reactor in order to prevent silica gel formation from the eudialyte ore. The obtained results revealed that silica gel formation is prevented during dissolution with sulphuric acid. A high leaching efficiency of light rare earth elements (La, Ce, Nd, Y) was reached using the dry digestion process with sulphuric acid, where the starting molarity was 12 mol/L. After the filtration process, magnetic separation is studied as the main method to recover weakly magnetic minerals like amphiboles and pyroxenes from the leaching residue in the magnetic fraction and feldspars in the nonmagnetic fraction. A new combined research strategy was developed for the production of different concentrates such as the one bearing Zr, Hf, and Nb.
PB  - MDPI
T2  - Minerals
T1  - Prevention of Silica Gel Formation for Eudialyte Study Using New Digestion Reactor
VL  - 14
IS  - 2
SP  - 124
DO  - 10.3390/min14020124
ER  - 

@article{
author = "Silin, Ivan and Dertmann, Christian and Cvetković, Vesna S. and Stopić, Srećko and Friedrich, Bernd",
year = "2024",
abstract = "This work includes a combined hydrometallurgical treatment of a eudialyte ore sample
with a subsequent preparation of leaching residue using mechanical separation methods. Hydrometallurgical treatment contains dry digestion with sulphuric acid at room temperature and filtration of the obtained product. The objectives of adopting these procedures are to test a new digestion reactor in order to prevent silica gel formation from the eudialyte ore. The obtained results revealed that silica gel formation is prevented during dissolution with sulphuric acid. A high leaching efficiency of light rare earth elements (La, Ce, Nd, Y) was reached using the dry digestion process with sulphuric acid, where the starting molarity was 12 mol/L. After the filtration process, magnetic separation is studied as the main method to recover weakly magnetic minerals like amphiboles and pyroxenes from the leaching residue in the magnetic fraction and feldspars in the nonmagnetic fraction. A new combined research strategy was developed for the production of different concentrates such as the one bearing Zr, Hf, and Nb.",
publisher = "MDPI",
journal = "Minerals",
title = "Prevention of Silica Gel Formation for Eudialyte Study Using New Digestion Reactor",
volume = "14",
number = "2",
pages = "124",
doi = "10.3390/min14020124"
}

Silin, I., Dertmann, C., Cvetković, V. S., Stopić, S.,& Friedrich, B.. (2024). Prevention of Silica Gel Formation for Eudialyte Study Using New Digestion Reactor. in Minerals
MDPI., 14(2), 124.
https://doi.org/10.3390/min14020124

Silin I, Dertmann C, Cvetković VS, Stopić S, Friedrich B. Prevention of Silica Gel Formation for Eudialyte Study Using New Digestion Reactor. in Minerals. 2024;14(2):124.
doi:10.3390/min14020124 .

Silin, Ivan, Dertmann, Christian, Cvetković, Vesna S., Stopić, Srećko, Friedrich, Bernd, "Prevention of Silica Gel Formation for Eudialyte Study Using New Digestion Reactor" in Minerals, 14, no. 2 (2024):124,
https://doi.org/10.3390/min14020124 . .

TY  - JOUR
AU  - Chung, Hanwen
AU  - Prasakti, Laras
AU  - Stopić, Srećko
AU  - Feldhaus, Dominic
AU  - Cvetković, Vesna S.
AU  - Friedrich, Bernd
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6107
AB  - The results obtained from the work on a concept of a recycling process for NdFeB magnets
to recover rare earth elements for remanufacturing similar magnets are presented. This paper
investigates the viability of extracting rare earth metals from magnet recycling-derived oxide (MRDO) by means of molten salt electrolysis. The MRDO was produced from spent NdFeB magnets through oxidation in air and subsequently carbothermic reduction under an 80 mbar Ar gas atmosphere. This MRDO contained roughly 33 wt.% Nd and 10 wt.% Pr. The electrochemical reduction process of the MRDO on molybdenum electrodes in NdF3 + LiF and NdF3 + PrF3 + LiF fused salts systems was investigated by cyclic voltammetry and chronoamperometry measurements. The resulting electrolytes and electrodes were examined after potentiostatic deposition by scanning electron microscopy (SEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), and X-ray diffraction (XRD) analysis. The electrodeposited metals appeared to accumulate on the cathode and X-ray diffraction analysis confirmed the formation of metallic Nd and Pr on the working substrate. The suitability of the obtained alloy intended for the remanufacturing of NdFeB magnets was then evaluated.
PB  - MDPI
T2  - Metals
T1  - Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part)
VL  - 13
IS  - 3
SP  - 559
DO  - https://doi.org/10.3390/met13030559
ER  - 

@article{
author = "Chung, Hanwen and Prasakti, Laras and Stopić, Srećko and Feldhaus, Dominic and Cvetković, Vesna S. and Friedrich, Bernd",
year = "2023",
abstract = "The results obtained from the work on a concept of a recycling process for NdFeB magnets
to recover rare earth elements for remanufacturing similar magnets are presented. This paper
investigates the viability of extracting rare earth metals from magnet recycling-derived oxide (MRDO) by means of molten salt electrolysis. The MRDO was produced from spent NdFeB magnets through oxidation in air and subsequently carbothermic reduction under an 80 mbar Ar gas atmosphere. This MRDO contained roughly 33 wt.% Nd and 10 wt.% Pr. The electrochemical reduction process of the MRDO on molybdenum electrodes in NdF3 + LiF and NdF3 + PrF3 + LiF fused salts systems was investigated by cyclic voltammetry and chronoamperometry measurements. The resulting electrolytes and electrodes were examined after potentiostatic deposition by scanning electron microscopy (SEM), inductively coupled plasma optical emission spectroscopy (ICP-OES), and X-ray diffraction (XRD) analysis. The electrodeposited metals appeared to accumulate on the cathode and X-ray diffraction analysis confirmed the formation of metallic Nd and Pr on the working substrate. The suitability of the obtained alloy intended for the remanufacturing of NdFeB magnets was then evaluated.",
publisher = "MDPI",
journal = "Metals",
title = "Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part)",
volume = "13",
number = "3",
pages = "559",
doi = "https://doi.org/10.3390/met13030559"
}

Chung, H., Prasakti, L., Stopić, S., Feldhaus, D., Cvetković, V. S.,& Friedrich, B.. (2023). Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part). in Metals
MDPI., 13(3), 559.
https://doi.org/https://doi.org/10.3390/met13030559

Chung H, Prasakti L, Stopić S, Feldhaus D, Cvetković VS, Friedrich B. Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part). in Metals. 2023;13(3):559.
doi:https://doi.org/10.3390/met13030559 .

Chung, Hanwen, Prasakti, Laras, Stopić, Srećko, Feldhaus, Dominic, Cvetković, Vesna S., Friedrich, Bernd, "Recovery of Rare Earth Elements from Spent NdFeB Magnets: Metal Extraction by Molten Salt Electrolysis (Third Part)" in Metals, 13, no. 3 (2023):559,
https://doi.org/https://doi.org/10.3390/met13030559 . .

TY  - JOUR
AU  - Djurdjevic, Mile
AU  - Manasijević, Srećko
AU  - Mihailović, Marija
AU  - Stopić, Srećko
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7208
AB  - There is a long process to transform bauxite, a critical raw material, into a substance with the required properties of cast aluminum alloys for use in electro automotive parts. Thanks to its unique properties, aluminum has become the material of choice for clean technology manufacturers in applications such as use in the automotive industry, renewable energy, batteries, electrical systems, resource-saving packaging, energy efficient buildings and clean mobility. Restructuring of the economy, the oil crisis, air pollution and global warming are some of the factors that have moved the automotive industry towards electrification since the beginning of the 21st century. This paper aims to highlight the required properties of cast aluminum alloys applied to the production of electro automotive parts, such as their mechanical and thermophysical properties, dimensional stability, corrosion resistance, electromagnetic compatibility and crashworthiness. Furthermore, this paper discusses which of the cast aluminum–silicon alloys, as well as the heat treatments and casting processes, are most suitable.
PB  - MDPI
T2  - Metals
T1  - From Bauxite as a Critical Material to the Required Properties of Cast Aluminum Alloys for Use in Electro Automotive Parts
VL  - 13
IS  - 11
SP  - 1796
DO  - 10.3390/met13111796
ER  - 

@article{
author = "Djurdjevic, Mile and Manasijević, Srećko and Mihailović, Marija and Stopić, Srećko",
year = "2023",
abstract = "There is a long process to transform bauxite, a critical raw material, into a substance with the required properties of cast aluminum alloys for use in electro automotive parts. Thanks to its unique properties, aluminum has become the material of choice for clean technology manufacturers in applications such as use in the automotive industry, renewable energy, batteries, electrical systems, resource-saving packaging, energy efficient buildings and clean mobility. Restructuring of the economy, the oil crisis, air pollution and global warming are some of the factors that have moved the automotive industry towards electrification since the beginning of the 21st century. This paper aims to highlight the required properties of cast aluminum alloys applied to the production of electro automotive parts, such as their mechanical and thermophysical properties, dimensional stability, corrosion resistance, electromagnetic compatibility and crashworthiness. Furthermore, this paper discusses which of the cast aluminum–silicon alloys, as well as the heat treatments and casting processes, are most suitable.",
publisher = "MDPI",
journal = "Metals",
title = "From Bauxite as a Critical Material to the Required Properties of Cast Aluminum Alloys for Use in Electro Automotive Parts",
volume = "13",
number = "11",
pages = "1796",
doi = "10.3390/met13111796"
}

Djurdjevic, M., Manasijević, S., Mihailović, M.,& Stopić, S.. (2023). From Bauxite as a Critical Material to the Required Properties of Cast Aluminum Alloys for Use in Electro Automotive Parts. in Metals
MDPI., 13(11), 1796.
https://doi.org/10.3390/met13111796

Djurdjevic M, Manasijević S, Mihailović M, Stopić S. From Bauxite as a Critical Material to the Required Properties of Cast Aluminum Alloys for Use in Electro Automotive Parts. in Metals. 2023;13(11):1796.
doi:10.3390/met13111796 .

Djurdjevic, Mile, Manasijević, Srećko, Mihailović, Marija, Stopić, Srećko, "From Bauxite as a Critical Material to the Required Properties of Cast Aluminum Alloys for Use in Electro Automotive Parts" in Metals, 13, no. 11 (2023):1796,
https://doi.org/10.3390/met13111796 . .

TY  - JOUR
AU  - Alkan, Gözde
AU  - Košević, Milica
AU  - Mihailović, Marija
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5324
AB  - Polygonal Pt nanoparticles were synthesized using ultrasonic spray pyrolysis (USP) at different precursor concentrations. Physicochemical analysis of the synthesized Pt particles involved thermogravimetric, microscopic, electron diffractive, and light absorptive/refractive characteristics. Electrochemical properties and activity in the oxygen reduction reaction (ORR) of the prepared material were compared to commercial Pt black. Registered electrochemical behavior is correlated to the structural properties of synthesized powders by impedance characteristics in ORR. The reported results confirmed that Pt nanoparticles of a characteristic and uniform size and shape, suitable for incorporation on the surfaces of interactive hosts as catalyst supports, were synthesized. It is found that USP-synthesized Pt involves larger particles than Pt black, with the size being slightly dependent on precursor concentration. Among ORR-active planes, the least active (111) structurally defined the synthesized particles. These two morphological and structural characteristics caused the USP-Pt to be made of lower Pt-intrinsic capacitive and redox currents, as well as of lower ORR activity. Although being of lower activity, USP-Pt is less sensitive to the rate of ORR current perturbations at higher overpotentials. This issue is assigned to less-compact catalyst layers and uniform particle size distribution, and consequently, of activity throughout the catalyst layer with respect to Pt black. These features are considered to positively affect catalyst stability and thus promote USP synthesis for improved properties of host-supported Pt catalysts.
PB  - MDPI
T2  - Metals
T1  - Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts
VL  - 12
IS  - 2
SP  - 290
DO  - 10.3390/met12020290
ER  - 

@article{
author = "Alkan, Gözde and Košević, Milica and Mihailović, Marija and Stopić, Srećko and Friedrich, Bernd and Stevanović, Jasmina and Panić, Vladimir",
year = "2022",
abstract = "Polygonal Pt nanoparticles were synthesized using ultrasonic spray pyrolysis (USP) at different precursor concentrations. Physicochemical analysis of the synthesized Pt particles involved thermogravimetric, microscopic, electron diffractive, and light absorptive/refractive characteristics. Electrochemical properties and activity in the oxygen reduction reaction (ORR) of the prepared material were compared to commercial Pt black. Registered electrochemical behavior is correlated to the structural properties of synthesized powders by impedance characteristics in ORR. The reported results confirmed that Pt nanoparticles of a characteristic and uniform size and shape, suitable for incorporation on the surfaces of interactive hosts as catalyst supports, were synthesized. It is found that USP-synthesized Pt involves larger particles than Pt black, with the size being slightly dependent on precursor concentration. Among ORR-active planes, the least active (111) structurally defined the synthesized particles. These two morphological and structural characteristics caused the USP-Pt to be made of lower Pt-intrinsic capacitive and redox currents, as well as of lower ORR activity. Although being of lower activity, USP-Pt is less sensitive to the rate of ORR current perturbations at higher overpotentials. This issue is assigned to less-compact catalyst layers and uniform particle size distribution, and consequently, of activity throughout the catalyst layer with respect to Pt black. These features are considered to positively affect catalyst stability and thus promote USP synthesis for improved properties of host-supported Pt catalysts.",
publisher = "MDPI",
journal = "Metals",
title = "Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts",
volume = "12",
number = "2",
pages = "290",
doi = "10.3390/met12020290"
}

Alkan, G., Košević, M., Mihailović, M., Stopić, S., Friedrich, B., Stevanović, J.,& Panić, V.. (2022). Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts. in Metals
MDPI., 12(2), 290.
https://doi.org/10.3390/met12020290

Alkan G, Košević M, Mihailović M, Stopić S, Friedrich B, Stevanović J, Panić V. Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts. in Metals. 2022;12(2):290.
doi:10.3390/met12020290 .

Alkan, Gözde, Košević, Milica, Mihailović, Marija, Stopić, Srećko, Friedrich, Bernd, Stevanović, Jasmina, Panić, Vladimir, "Characterization of Defined Pt Particles Prepared by Ultrasonic Spray Pyrolysis for One-Step Synthesis of Supported ORR Composite Catalysts" in Metals, 12, no. 2 (2022):290,
https://doi.org/10.3390/met12020290 . .

TY  - JOUR
AU  - Mitterecker, Jonas
AU  - Košević, Milica
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
AU  - Stevanović, Jasmina
AU  - Mihailović, Marija
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5362
AB  - Determination of the extractive behavior of ionic species from lateritic ore leachates is complex, since the leachates are pregnant with tens of different ions in, as a rule, multiple oxide states. To examine the possible pathways of intrinsic electrochemical extraction of the crucial elements Ni and Co, it was necessary to make model solutions of these elements and to subject them to electrochemical examination techniques in order to obtain a benchmark. Beside Ni and Co, the model system for Fe had to be evaluated. Iron, as a dominant ore component by far, is the main interfering factor in the extraction processes of Ni and Co in rather low amounts from leaching solution. The leachate examination results were compared to separate model solutions, as well as to their combinations in concentrations and to pH values comparable to those of the leachate. The separation of the leachate components was initially performed by continuous increase in pH upon leaching with NaOH solution, and afterwards the pH-adjusted solutions were subjected to electrochemical investigation. With the purpose of connecting and quantifying the visual changes in leachate upon increase in pH, conductometric measurements were performed. Reactions of oxidation/precipitations were indicated, which led to the essential Fe removal by precipitation. Resulting solutions were found suitable for Ni and Co electrochemical extraction.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Metals
T1  - Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction
VL  - 12
IS  - 2
SP  - 325
DO  - 10.3390/met12020325
ER  - 

@article{
author = "Mitterecker, Jonas and Košević, Milica and Stopić, Srećko and Friedrich, Bernd and Panić, Vladimir and Stevanović, Jasmina and Mihailović, Marija",
year = "2022",
abstract = "Determination of the extractive behavior of ionic species from lateritic ore leachates is complex, since the leachates are pregnant with tens of different ions in, as a rule, multiple oxide states. To examine the possible pathways of intrinsic electrochemical extraction of the crucial elements Ni and Co, it was necessary to make model solutions of these elements and to subject them to electrochemical examination techniques in order to obtain a benchmark. Beside Ni and Co, the model system for Fe had to be evaluated. Iron, as a dominant ore component by far, is the main interfering factor in the extraction processes of Ni and Co in rather low amounts from leaching solution. The leachate examination results were compared to separate model solutions, as well as to their combinations in concentrations and to pH values comparable to those of the leachate. The separation of the leachate components was initially performed by continuous increase in pH upon leaching with NaOH solution, and afterwards the pH-adjusted solutions were subjected to electrochemical investigation. With the purpose of connecting and quantifying the visual changes in leachate upon increase in pH, conductometric measurements were performed. Reactions of oxidation/precipitations were indicated, which led to the essential Fe removal by precipitation. Resulting solutions were found suitable for Ni and Co electrochemical extraction.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Metals",
title = "Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction",
volume = "12",
number = "2",
pages = "325",
doi = "10.3390/met12020325"
}

Mitterecker, J., Košević, M., Stopić, S., Friedrich, B., Panić, V., Stevanović, J.,& Mihailović, M.. (2022). Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction. in Metals
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 12(2), 325.
https://doi.org/10.3390/met12020325

Mitterecker J, Košević M, Stopić S, Friedrich B, Panić V, Stevanović J, Mihailović M. Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction. in Metals. 2022;12(2):325.
doi:10.3390/met12020325 .

Mitterecker, Jonas, Košević, Milica, Stopić, Srećko, Friedrich, Bernd, Panić, Vladimir, Stevanović, Jasmina, Mihailović, Marija, "Electrochemical Investigation of Lateritic Ore Leaching Solutions for Ni and Co Ions Extraction" in Metals, 12, no. 2 (2022):325,
https://doi.org/10.3390/met12020325 . .

TY  - JOUR
AU  - Varničić, Miroslava
AU  - Pavlović, Miroslav M.
AU  - Eraković Pantović, Sanja
AU  - Mihailović, Marija
AU  - Pantović Pavlović, Marijana R.
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5371
AB  - Hybrid nanomaterials based on manganese, cobalt, and lanthanum oxides of different morphology and phase compositions were prepared using a facile single-step ultrasonic spray pyrolysis (USP) process and tested as electrocatalysts for oxygen reduction reaction (ORR). The structural and morphological characterizations were completed by XRD and SEM-EDS. Electrochemical performance was characterized by cyclic voltammetry and linear sweep voltammetry in a rotating disk electrode assembly. All synthesized materials were found electrocatalytically active for ORR in alkaline media. Two different manganese oxide states were incorporated into a Co3O4 matrix, δ-MnO2 at 500 and 600◦C and manganese (II,III) oxide-Mn3O4 at 800◦C. The difference in crystalline structure revealed flower-like nanosheets for birnessite-MnO2 and well-defined spherical nanoparticles for material based on Mn3O4. Electrochemical responses indicate that the ORR mechanism follows a preceding step of MnO2 reduction to MnOOH. The calculated number of electrons exchanged for the hybrid materials demonstrate a four-electron oxygen reduction pathway and high electrocatalytic activity towards ORR. The comparison of molar catalytic activities points out the importance of the composition and that the synergy of Co and Mn is superior to Co3O4/La2O3 and pristine Mn oxide. The results reveal that synthesized hybrid materials are promising electrocatalysts for ORR.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Metals
T1  - Spray-pyrolytic tunable structures of mn oxides-based composites for electrocatalytic activity improvement in oxygen reduction
VL  - 12
IS  - 1
SP  - 22
DO  - 10.3390/met12010022
ER  - 

@article{
author = "Varničić, Miroslava and Pavlović, Miroslav M. and Eraković Pantović, Sanja and Mihailović, Marija and Pantović Pavlović, Marijana R. and Stopić, Srećko and Friedrich, Bernd",
year = "2022",
abstract = "Hybrid nanomaterials based on manganese, cobalt, and lanthanum oxides of different morphology and phase compositions were prepared using a facile single-step ultrasonic spray pyrolysis (USP) process and tested as electrocatalysts for oxygen reduction reaction (ORR). The structural and morphological characterizations were completed by XRD and SEM-EDS. Electrochemical performance was characterized by cyclic voltammetry and linear sweep voltammetry in a rotating disk electrode assembly. All synthesized materials were found electrocatalytically active for ORR in alkaline media. Two different manganese oxide states were incorporated into a Co3O4 matrix, δ-MnO2 at 500 and 600◦C and manganese (II,III) oxide-Mn3O4 at 800◦C. The difference in crystalline structure revealed flower-like nanosheets for birnessite-MnO2 and well-defined spherical nanoparticles for material based on Mn3O4. Electrochemical responses indicate that the ORR mechanism follows a preceding step of MnO2 reduction to MnOOH. The calculated number of electrons exchanged for the hybrid materials demonstrate a four-electron oxygen reduction pathway and high electrocatalytic activity towards ORR. The comparison of molar catalytic activities points out the importance of the composition and that the synergy of Co and Mn is superior to Co3O4/La2O3 and pristine Mn oxide. The results reveal that synthesized hybrid materials are promising electrocatalysts for ORR.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Metals",
title = "Spray-pyrolytic tunable structures of mn oxides-based composites for electrocatalytic activity improvement in oxygen reduction",
volume = "12",
number = "1",
pages = "22",
doi = "10.3390/met12010022"
}

Varničić, M., Pavlović, M. M., Eraković Pantović, S., Mihailović, M., Pantović Pavlović, M. R., Stopić, S.,& Friedrich, B.. (2022). Spray-pyrolytic tunable structures of mn oxides-based composites for electrocatalytic activity improvement in oxygen reduction. in Metals
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 12(1), 22.
https://doi.org/10.3390/met12010022

Varničić M, Pavlović MM, Eraković Pantović S, Mihailović M, Pantović Pavlović MR, Stopić S, Friedrich B. Spray-pyrolytic tunable structures of mn oxides-based composites for electrocatalytic activity improvement in oxygen reduction. in Metals. 2022;12(1):22.
doi:10.3390/met12010022 .

Varničić, Miroslava, Pavlović, Miroslav M., Eraković Pantović, Sanja, Mihailović, Marija, Pantović Pavlović, Marijana R., Stopić, Srećko, Friedrich, Bernd, "Spray-pyrolytic tunable structures of mn oxides-based composites for electrocatalytic activity improvement in oxygen reduction" in Metals, 12, no. 1 (2022):22,
https://doi.org/10.3390/met12010022 . .

TY  - JOUR
AU  - Panić, Stefan
AU  - Pantović Pavlović, Marijana
AU  - Varničić, Miroslava
AU  - Tadić, Vojin
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Pavlović, Miroslav M.
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5598
AB  - The main objective of this research was a systematic development of advanced micro/nanostructured materials based on the most used metal-oxides for ORR and metal-oxides with an extremely low-loading of Pt for comparison. Hybrid composites compared were: MnO2, La2O3, mixed lanthanum manganese oxides (LMO), and mixed lanthanum manganese oxides with reduced platinum load (LMO-Pt). The influence of the reduced amount of noble metal, as well as single oxide activity toward ORR, was analyzed. The complete electrochemical performance of the hybrid materials has been performed by means of CV, LSV, and EIS. It was shown that all synthesized catalytic materials were ORR-active with noticeable reduction currents in O2 saturated 0.1 M KOH. The ORR behavior indicated that the La2O3 electrode has a different mechanism than the other tested electrode materials (MnO2, LMO, and LMO-Pt). The EIS results have revealed that the ORR reaction is of a mixed character, being electrochemically and diffusion controlled. Even more, diffusion is of mixed character due to transport of O2 molecules and the chemical reaction of oxygen reduction. O2 diffusion was shown to be the dominant process for MnO2, LMO, and LMO-Pt electrolytic materials, while chemical reaction is the dominant process for La2O3 electrolytic materials.
PB  - MDPI AG
T2  - Catalysts
T1  - Rare-Earth/Manganese Oxide-Based Composites Materials for Electrochemical Oxygen Reduction Reaction
VL  - 12
IS  - 6
SP  - 641
DO  - 10.3390/catal12060641
ER  - 

@article{
author = "Panić, Stefan and Pantović Pavlović, Marijana and Varničić, Miroslava and Tadić, Vojin and Stopić, Srećko and Friedrich, Bernd and Pavlović, Miroslav M.",
year = "2022",
abstract = "The main objective of this research was a systematic development of advanced micro/nanostructured materials based on the most used metal-oxides for ORR and metal-oxides with an extremely low-loading of Pt for comparison. Hybrid composites compared were: MnO2, La2O3, mixed lanthanum manganese oxides (LMO), and mixed lanthanum manganese oxides with reduced platinum load (LMO-Pt). The influence of the reduced amount of noble metal, as well as single oxide activity toward ORR, was analyzed. The complete electrochemical performance of the hybrid materials has been performed by means of CV, LSV, and EIS. It was shown that all synthesized catalytic materials were ORR-active with noticeable reduction currents in O2 saturated 0.1 M KOH. The ORR behavior indicated that the La2O3 electrode has a different mechanism than the other tested electrode materials (MnO2, LMO, and LMO-Pt). The EIS results have revealed that the ORR reaction is of a mixed character, being electrochemically and diffusion controlled. Even more, diffusion is of mixed character due to transport of O2 molecules and the chemical reaction of oxygen reduction. O2 diffusion was shown to be the dominant process for MnO2, LMO, and LMO-Pt electrolytic materials, while chemical reaction is the dominant process for La2O3 electrolytic materials.",
publisher = "MDPI AG",
journal = "Catalysts",
title = "Rare-Earth/Manganese Oxide-Based Composites Materials for Electrochemical Oxygen Reduction Reaction",
volume = "12",
number = "6",
pages = "641",
doi = "10.3390/catal12060641"
}

Panić, S., Pantović Pavlović, M., Varničić, M., Tadić, V., Stopić, S., Friedrich, B.,& Pavlović, M. M.. (2022). Rare-Earth/Manganese Oxide-Based Composites Materials for Electrochemical Oxygen Reduction Reaction. in Catalysts
MDPI AG., 12(6), 641.
https://doi.org/10.3390/catal12060641

Panić S, Pantović Pavlović M, Varničić M, Tadić V, Stopić S, Friedrich B, Pavlović MM. Rare-Earth/Manganese Oxide-Based Composites Materials for Electrochemical Oxygen Reduction Reaction. in Catalysts. 2022;12(6):641.
doi:10.3390/catal12060641 .

Panić, Stefan, Pantović Pavlović, Marijana, Varničić, Miroslava, Tadić, Vojin, Stopić, Srećko, Friedrich, Bernd, Pavlović, Miroslav M., "Rare-Earth/Manganese Oxide-Based Composites Materials for Electrochemical Oxygen Reduction Reaction" in Catalysts, 12, no. 6 (2022):641,
https://doi.org/10.3390/catal12060641 . .

TY  - JOUR
AU  - Volkov - Husović, Tatjana
AU  - Ivanić, Ivana
AU  - Kožuh, Stjepan
AU  - Stevanović, Sanja
AU  - Vlahović, Milica
AU  - Martinović, Sanja
AU  - Stopić, Srećko
AU  - Gojić, Mirko
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4745
AB  - Microstructural and cavitation erosion testing was carried out on Cu-12.8Al-4.1Ni (wt. %) shape memory alloy (SMA) samples produced by continuous casting followed by heat treatment consisting of solution annealing at 885◦ C for 60 min and, later, water quenching. Cavitation resistance testing was applied using a standard ultrasonic vibratory cavitation set up with stationary specimen. Surface changes during the cavitation were monitored by metallographic analysis using an optical microscope (OM), atomic force microscope (AFM), and scanning electron microscope (SEM) as well as by weight measurements. The results revealed a martensite microstructure after both casting and quenching. Microhardness value was higher after water quenching than in the as-cast state. After 420 min of cavitation exposure, a negligible mass loss was noticed for both samples. Based on the obtained results, both samples showed excellent cavitation resistance. Mass loss and morphological analysis of the formed pits indicated better cavitation resistance for the as-cast state (L).
PB  - MDPI
T2  - Metals
T1  - Microstructural and cavitation erosion behavior of the cualni shape memory alloy
VL  - 11
IS  - 7
SP  - 997
DO  - 10.3390/met11070997
ER  - 

@article{
author = "Volkov - Husović, Tatjana and Ivanić, Ivana and Kožuh, Stjepan and Stevanović, Sanja and Vlahović, Milica and Martinović, Sanja and Stopić, Srećko and Gojić, Mirko",
year = "2021",
abstract = "Microstructural and cavitation erosion testing was carried out on Cu-12.8Al-4.1Ni (wt. %) shape memory alloy (SMA) samples produced by continuous casting followed by heat treatment consisting of solution annealing at 885◦ C for 60 min and, later, water quenching. Cavitation resistance testing was applied using a standard ultrasonic vibratory cavitation set up with stationary specimen. Surface changes during the cavitation were monitored by metallographic analysis using an optical microscope (OM), atomic force microscope (AFM), and scanning electron microscope (SEM) as well as by weight measurements. The results revealed a martensite microstructure after both casting and quenching. Microhardness value was higher after water quenching than in the as-cast state. After 420 min of cavitation exposure, a negligible mass loss was noticed for both samples. Based on the obtained results, both samples showed excellent cavitation resistance. Mass loss and morphological analysis of the formed pits indicated better cavitation resistance for the as-cast state (L).",
publisher = "MDPI",
journal = "Metals",
title = "Microstructural and cavitation erosion behavior of the cualni shape memory alloy",
volume = "11",
number = "7",
pages = "997",
doi = "10.3390/met11070997"
}

Volkov - Husović, T., Ivanić, I., Kožuh, S., Stevanović, S., Vlahović, M., Martinović, S., Stopić, S.,& Gojić, M.. (2021). Microstructural and cavitation erosion behavior of the cualni shape memory alloy. in Metals
MDPI., 11(7), 997.
https://doi.org/10.3390/met11070997

Volkov - Husović T, Ivanić I, Kožuh S, Stevanović S, Vlahović M, Martinović S, Stopić S, Gojić M. Microstructural and cavitation erosion behavior of the cualni shape memory alloy. in Metals. 2021;11(7):997.
doi:10.3390/met11070997 .

Volkov - Husović, Tatjana, Ivanić, Ivana, Kožuh, Stjepan, Stevanović, Sanja, Vlahović, Milica, Martinović, Sanja, Stopić, Srećko, Gojić, Mirko, "Microstructural and cavitation erosion behavior of the cualni shape memory alloy" in Metals, 11, no. 7 (2021):997,
https://doi.org/10.3390/met11070997 . .

TY  - CONF
AU  - Mitterecker, Jonas
AU  - Mihailović, Marija
AU  - Košević, Milica
AU  - Stevanović, Jasmina
AU  - Stopić, Srećko
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4884
AB  - Hydrometallurgical procedure and chemical measurements were employed to study the precipitation behavior of different metals in a lateritic ore pregnant leach solution (PLS). Lateritic ore was leached in 1 M H2SO4 solution at 70 oC by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of metal ions by precipitation. Measurements of pH as well as chemical analysis show characteristic values of metal ion removal from the PLS.
AB  - Hidrometalurški postupak luženja lateritne rude uz hemijske analize u rastvoru luženja su korišćeni kako bi se ispitalo ponašanje različitih metala u koncentrovanom rastvoru luženja (PLS). Lateritna ruda podvrgnuta je standardnom postupku luženja u rastvoru 1 M H2SO4 na 70 oC. Iz dobijene lužine su nakon toga taloženi joni metala tokom menjanja pH vrednosti prvobitnog PLS rastvora. Rezultati merenja pH, kao i hemijskih analiza dali su karakteristične vrednosti na kojima je moguće iz PLS rastvora odstraniti određene jone metala.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)
C3  - Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
T1  - Precipitation behaviour in pH adjusted lateritic ore solution
SP  - 190
SP  - 194
UR  - https://hdl.handle.net/21.15107/rcub_cer_4884
ER  - 

@conference{
author = "Mitterecker, Jonas and Mihailović, Marija and Košević, Milica and Stevanović, Jasmina and Stopić, Srećko and Panić, Vladimir and Friedrich, Bernd",
year = "2021",
abstract = "Hydrometallurgical procedure and chemical measurements were employed to study the precipitation behavior of different metals in a lateritic ore pregnant leach solution (PLS). Lateritic ore was leached in 1 M H2SO4 solution at 70 oC by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of metal ions by precipitation. Measurements of pH as well as chemical analysis show characteristic values of metal ion removal from the PLS., Hidrometalurški postupak luženja lateritne rude uz hemijske analize u rastvoru luženja su korišćeni kako bi se ispitalo ponašanje različitih metala u koncentrovanom rastvoru luženja (PLS). Lateritna ruda podvrgnuta je standardnom postupku luženja u rastvoru 1 M H2SO4 na 70 oC. Iz dobijene lužine su nakon toga taloženi joni metala tokom menjanja pH vrednosti prvobitnog PLS rastvora. Rezultati merenja pH, kao i hemijskih analiza dali su karakteristične vrednosti na kojima je moguće iz PLS rastvora odstraniti određene jone metala.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)",
journal = "Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija",
title = "Precipitation behaviour in pH adjusted lateritic ore solution",
pages = "190-194",
url = "https://hdl.handle.net/21.15107/rcub_cer_4884"
}

Mitterecker, J., Mihailović, M., Košević, M., Stevanović, J., Stopić, S., Panić, V.,& Friedrich, B.. (2021). Precipitation behaviour in pH adjusted lateritic ore solution. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
Belgrade : Serbian Society of Corrosion and Materials Protection (UISKOZAM)., 190.
https://hdl.handle.net/21.15107/rcub_cer_4884

Mitterecker J, Mihailović M, Košević M, Stevanović J, Stopić S, Panić V, Friedrich B. Precipitation behaviour in pH adjusted lateritic ore solution. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija. 2021;:190.
https://hdl.handle.net/21.15107/rcub_cer_4884 .

Mitterecker, Jonas, Mihailović, Marija, Košević, Milica, Stevanović, Jasmina, Stopić, Srećko, Panić, Vladimir, Friedrich, Bernd, "Precipitation behaviour in pH adjusted lateritic ore solution" in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija (2021):190,
https://hdl.handle.net/21.15107/rcub_cer_4884 .

TY  - CONF
AU  - Mitterecker, Jonas
AU  - Košević, Milica
AU  - Mihailović, Marija
AU  - Stevanović, Jasmina
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4885
AB  - Electrochemical measurements were employed to study the possibility of the extraction of metal ions from lateritic ore leachates predominantly rich in Fe in order to separate more noble cobalt and nickel metals. Lateritic ore was leached in 1 M H2SO4 solution at 70 °C by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of Fe ions by precipitation. Results obtained from cyclic voltammetry and chronamperometry measurements in native leachate and those with adjusted pH showed that optimal pH value for Fe removal was 3.7.
AB  - Elektrohemijskim merenjima je ispitivana mogućnost izdvajanja kobalta i nikla iz lužine lateritne rude bogate sa Fe. Rastvorne komponente lateritne rude su standardnim procesom luženja, tretiranjem u 1 M rastvoru H2SO4 na povišenoj temperaturi, prevedene u rastvor. U sledećoj fazi prečišćavanja dobijenom rastvoru je podešavana pH vrednost kako bi se joni Fe preveli u talog. Cikličnom voltametrijom i hronoamperometrijom je pokazano da je optimalna vrednost za uklanjanje jona Fe 3,7.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM
C3  - Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
T1  - Electrochemical investigation of lateritic ore leachates for metal ions extraction
SP  - 195
EP  - 198
UR  - https://hdl.handle.net/21.15107/rcub_cer_4885
ER  - 

@conference{
author = "Mitterecker, Jonas and Košević, Milica and Mihailović, Marija and Stevanović, Jasmina and Stopić, Srećko and Friedrich, Bernd and Panić, Vladimir",
year = "2021",
abstract = "Electrochemical measurements were employed to study the possibility of the extraction of metal ions from lateritic ore leachates predominantly rich in Fe in order to separate more noble cobalt and nickel metals. Lateritic ore was leached in 1 M H2SO4 solution at 70 °C by standard leaching process. The leachate was afterwards subjected to the pH adjustment that led to the removal of Fe ions by precipitation. Results obtained from cyclic voltammetry and chronamperometry measurements in native leachate and those with adjusted pH showed that optimal pH value for Fe removal was 3.7., Elektrohemijskim merenjima je ispitivana mogućnost izdvajanja kobalta i nikla iz lužine lateritne rude bogate sa Fe. Rastvorne komponente lateritne rude su standardnim procesom luženja, tretiranjem u 1 M rastvoru H2SO4 na povišenoj temperaturi, prevedene u rastvor. U sledećoj fazi prečišćavanja dobijenom rastvoru je podešavana pH vrednost kako bi se joni Fe preveli u talog. Cikličnom voltametrijom i hronoamperometrijom je pokazano da je optimalna vrednost za uklanjanje jona Fe 3,7.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM",
journal = "Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija",
title = "Electrochemical investigation of lateritic ore leachates for metal ions extraction",
pages = "195-198",
url = "https://hdl.handle.net/21.15107/rcub_cer_4885"
}

Mitterecker, J., Košević, M., Mihailović, M., Stevanović, J., Stopić, S., Friedrich, B.,& Panić, V.. (2021). Electrochemical investigation of lateritic ore leachates for metal ions extraction. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija
Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM., 195-198.
https://hdl.handle.net/21.15107/rcub_cer_4885

Mitterecker J, Košević M, Mihailović M, Stevanović J, Stopić S, Friedrich B, Panić V. Electrochemical investigation of lateritic ore leachates for metal ions extraction. in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija. 2021;:195-198.
https://hdl.handle.net/21.15107/rcub_cer_4885 .

Mitterecker, Jonas, Košević, Milica, Mihailović, Marija, Stevanović, Jasmina, Stopić, Srećko, Friedrich, Bernd, Panić, Vladimir, "Electrochemical investigation of lateritic ore leachates for metal ions extraction" in Meeting point of the science and practice in the fields of corrosion, materials and environmental protection : proceedings XXII YuCorr International Conference / Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine : knjiga radova XXII YuCorr [Jugoslovenska korozija] Međunarodna konferencija (2021):195-198,
https://hdl.handle.net/21.15107/rcub_cer_4885 .

TY  - JOUR
AU  - Marković, Radmila
AU  - Krstić, Vesna
AU  - Friedrich, Bernd
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina
AU  - Stevanović, Zoran
AU  - Marjanović, Vesna
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4751
AB  - The electrorefining process of the non-commercial Cu anodes was tested on the enlarged laboratory equipment over 72 h. Cu anodes with Ni content of 5 or 10 wt.% and total content of Pb, Sn, and Sb of about 1.5 wt.% were used for the tests. The real waste solution of sulfuric acid character was a working electrolyte of different temperatures (T1 = 63 ± 2 °C and T2 = 73 ± 2 °C). The current density of 250 A/m2 was the same as in the commercial process. Tests were confirmed that those anodes can be used in the commercial copper electrorefining process based on the fact that the elements from anodes were dissolved, the total anode passivation did not occur, and copper is deposited onto cathodes. The masses of cathode deposits confirmed that the Cu ions from the electrolyte were also deposited onto cathodes. The concentration of Cu, As, and Sb ions in the electrolyte was decreased. At the same time, the concentration of Ni ions was increased by a maximum of up to 129.27 wt.%. The major crystalline phases in the obtained anode slime, detected by the X-ray diffraction analyses, were PbSO4, Cu3As, SbAsO4, Cu2O, As2O3, PbO, SnO, and Sb2O3.
PB  - MDPI
T2  - Metals
T1  - Electrorefining process of the non-commercial copper anodes
VL  - 11
IS  - 8
SP  - 1187
DO  - 10.3390/met11081187
ER  - 

@article{
author = "Marković, Radmila and Krstić, Vesna and Friedrich, Bernd and Stopić, Srećko and Stevanović, Jasmina and Stevanović, Zoran and Marjanović, Vesna",
year = "2021",
abstract = "The electrorefining process of the non-commercial Cu anodes was tested on the enlarged laboratory equipment over 72 h. Cu anodes with Ni content of 5 or 10 wt.% and total content of Pb, Sn, and Sb of about 1.5 wt.% were used for the tests. The real waste solution of sulfuric acid character was a working electrolyte of different temperatures (T1 = 63 ± 2 °C and T2 = 73 ± 2 °C). The current density of 250 A/m2 was the same as in the commercial process. Tests were confirmed that those anodes can be used in the commercial copper electrorefining process based on the fact that the elements from anodes were dissolved, the total anode passivation did not occur, and copper is deposited onto cathodes. The masses of cathode deposits confirmed that the Cu ions from the electrolyte were also deposited onto cathodes. The concentration of Cu, As, and Sb ions in the electrolyte was decreased. At the same time, the concentration of Ni ions was increased by a maximum of up to 129.27 wt.%. The major crystalline phases in the obtained anode slime, detected by the X-ray diffraction analyses, were PbSO4, Cu3As, SbAsO4, Cu2O, As2O3, PbO, SnO, and Sb2O3.",
publisher = "MDPI",
journal = "Metals",
title = "Electrorefining process of the non-commercial copper anodes",
volume = "11",
number = "8",
pages = "1187",
doi = "10.3390/met11081187"
}

Marković, R., Krstić, V., Friedrich, B., Stopić, S., Stevanović, J., Stevanović, Z.,& Marjanović, V.. (2021). Electrorefining process of the non-commercial copper anodes. in Metals
MDPI., 11(8), 1187.
https://doi.org/10.3390/met11081187

Marković R, Krstić V, Friedrich B, Stopić S, Stevanović J, Stevanović Z, Marjanović V. Electrorefining process of the non-commercial copper anodes. in Metals. 2021;11(8):1187.
doi:10.3390/met11081187 .

Marković, Radmila, Krstić, Vesna, Friedrich, Bernd, Stopić, Srećko, Stevanović, Jasmina, Stevanović, Zoran, Marjanović, Vesna, "Electrorefining process of the non-commercial copper anodes" in Metals, 11, no. 8 (2021):1187,
https://doi.org/10.3390/met11081187 . .

TY  - JOUR
AU  - Košević, Milica
AU  - Zarić, Milana
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina S.
AU  - Weirich, Thomas E.
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4430
AB  - Pt/TiO2 composites were synthesized by single-step ultrasonic spray pyrolysis (USP) at different temperatures. In an in-situ method, Pt and TiO2 particles were generated from tetra-n-butyl orthotitanate and chloroplatinic acid, and hydrothermally-prepared TiO2 colloidal dispersion served as Pt support in an ex-situ USP approach. USP-synthesized Pt/TiO2 composites were generated in the form of a solid mixture, morphologically organized in nesting huge hollow and small solid spheres, or TiO2 core/Pt shell regular spheroids by in-situ or ex-situ method, respectively. This paper exclusively reports on characteristic mechanisms of the formation of novel two-component solid composites, which are intrinsic from the USP approach and controlled precursor composition. The generation of the two morphological components within the in-situ approach, the hollow spheres and all-solid spheres, was indicated to be caused by characteristic sol-gel/solid phase transition of TiO2 . Both the walls of the hollow spheres and the cores of all-solid ones consist of TiO2 matrix populated by 10 nm-sized Pt. On the other hand, spherical, uniformly-sized, Pt particles of a few nanometers in size created a shell uniformly deposited onto TiO2 spheres of ca. 150 nm size. Activities of the prepared samples in an oxygen reduction reaction and combined oxygen reduction and hydrogen evolution reactions were electrochemically tested. The ex-situ synthesized Pt/TiO2 was more active for oxygen reduction and combined oxygen reduction and hydrogen reactions in comparison to the in-situ Pt/TiO2 samples, due to better availability of Pt within a core/shell structure for the reactions.
PB  - MDPI
T2  - Metals
T1  - Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis
VL  - 10
IS  - 1
SP  - 11
DO  - 10.3390/met10010011
ER  - 

@article{
author = "Košević, Milica and Zarić, Milana and Stopić, Srećko and Stevanović, Jasmina S. and Weirich, Thomas E. and Friedrich, Bernd and Panić, Vladimir",
year = "2020",
abstract = "Pt/TiO2 composites were synthesized by single-step ultrasonic spray pyrolysis (USP) at different temperatures. In an in-situ method, Pt and TiO2 particles were generated from tetra-n-butyl orthotitanate and chloroplatinic acid, and hydrothermally-prepared TiO2 colloidal dispersion served as Pt support in an ex-situ USP approach. USP-synthesized Pt/TiO2 composites were generated in the form of a solid mixture, morphologically organized in nesting huge hollow and small solid spheres, or TiO2 core/Pt shell regular spheroids by in-situ or ex-situ method, respectively. This paper exclusively reports on characteristic mechanisms of the formation of novel two-component solid composites, which are intrinsic from the USP approach and controlled precursor composition. The generation of the two morphological components within the in-situ approach, the hollow spheres and all-solid spheres, was indicated to be caused by characteristic sol-gel/solid phase transition of TiO2 . Both the walls of the hollow spheres and the cores of all-solid ones consist of TiO2 matrix populated by 10 nm-sized Pt. On the other hand, spherical, uniformly-sized, Pt particles of a few nanometers in size created a shell uniformly deposited onto TiO2 spheres of ca. 150 nm size. Activities of the prepared samples in an oxygen reduction reaction and combined oxygen reduction and hydrogen evolution reactions were electrochemically tested. The ex-situ synthesized Pt/TiO2 was more active for oxygen reduction and combined oxygen reduction and hydrogen reactions in comparison to the in-situ Pt/TiO2 samples, due to better availability of Pt within a core/shell structure for the reactions.",
publisher = "MDPI",
journal = "Metals",
title = "Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis",
volume = "10",
number = "1",
pages = "11",
doi = "10.3390/met10010011"
}

Košević, M., Zarić, M., Stopić, S., Stevanović, J. S., Weirich, T. E., Friedrich, B.,& Panić, V.. (2020). Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis. in Metals
MDPI., 10(1), 11.
https://doi.org/10.3390/met10010011

Košević M, Zarić M, Stopić S, Stevanović JS, Weirich TE, Friedrich B, Panić V. Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis. in Metals. 2020;10(1):11.
doi:10.3390/met10010011 .

Košević, Milica, Zarić, Milana, Stopić, Srećko, Stevanović, Jasmina S., Weirich, Thomas E., Friedrich, Bernd, Panić, Vladimir, "Structural and electrochemical properties of nesting and core/shell pt/tio2 spherical particles synthesized by ultrasonic spray pyrolysis" in Metals, 10, no. 1 (2020):11,
https://doi.org/10.3390/met10010011 . .

TY  - JOUR
AU  - Cvetković, Vesna S.
AU  - Vukićević, Nataša
AU  - Milićević-Neumann, Ksenija
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Jovićević, Jovan N.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3377
AB  - Al-Ti alloys were electrodeposited from equimolar chloroaluminate molten salts containing up to 0.1 M of titanium ions, which were added to the electrolyte by potentiostatic dissolution of metallic Ti. Titanium dissolution and titanium and aluminium deposition were investigated by linear sweep voltammetry and chronoamperometry at 200 and 300 °C. Working electrodes used were titanium and glassy carbon. The voltammograms on Ti obtained in the electrolyte without added Ti ions indicated titanium deposition and dissolution proceeding in three reversible steps: Ti4+ ⇄ Ti3+, Ti3+ ⇄ Ti2+ and Ti2+ ⇄ Ti. The voltammograms recorded with glassy carbon in the electrolyte containing added titanium ions did not always clearly register all of the three processes. However, peak currents, which were characteristics of Al, Ti and Al-Ti alloy deposition and dissolution, were evident in voltammograms on both working electrodes used. A constant potential electrodeposition regime was used to obtain deposits on the glassy carbon working electrode. The obtained deposits were characterized by SEM, energy-dispersive spectrometry and XRD. In the deposits on the glassy carbon electrode, the analysis identified an Al and AlTi3 alloy formed at 200 °C and an Al2Ti and Al3Ti alloy obtained at 300 °C.
PB  - MDPI
T2  - Metals
T1  - Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium
VL  - 10
IS  - 1
SP  - 88
DO  - 10.3390/met10010088
ER  - 

@article{
author = "Cvetković, Vesna S. and Vukićević, Nataša and Milićević-Neumann, Ksenija and Stopić, Srećko and Friedrich, Bernd and Jovićević, Jovan N.",
year = "2020",
abstract = "Al-Ti alloys were electrodeposited from equimolar chloroaluminate molten salts containing up to 0.1 M of titanium ions, which were added to the electrolyte by potentiostatic dissolution of metallic Ti. Titanium dissolution and titanium and aluminium deposition were investigated by linear sweep voltammetry and chronoamperometry at 200 and 300 °C. Working electrodes used were titanium and glassy carbon. The voltammograms on Ti obtained in the electrolyte without added Ti ions indicated titanium deposition and dissolution proceeding in three reversible steps: Ti4+ ⇄ Ti3+, Ti3+ ⇄ Ti2+ and Ti2+ ⇄ Ti. The voltammograms recorded with glassy carbon in the electrolyte containing added titanium ions did not always clearly register all of the three processes. However, peak currents, which were characteristics of Al, Ti and Al-Ti alloy deposition and dissolution, were evident in voltammograms on both working electrodes used. A constant potential electrodeposition regime was used to obtain deposits on the glassy carbon working electrode. The obtained deposits were characterized by SEM, energy-dispersive spectrometry and XRD. In the deposits on the glassy carbon electrode, the analysis identified an Al and AlTi3 alloy formed at 200 °C and an Al2Ti and Al3Ti alloy obtained at 300 °C.",
publisher = "MDPI",
journal = "Metals",
title = "Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium",
volume = "10",
number = "1",
pages = "88",
doi = "10.3390/met10010088"
}

Cvetković, V. S., Vukićević, N., Milićević-Neumann, K., Stopić, S., Friedrich, B.,& Jovićević, J. N.. (2020). Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium. in Metals
MDPI., 10(1), 88.
https://doi.org/10.3390/met10010088

Cvetković VS, Vukićević N, Milićević-Neumann K, Stopić S, Friedrich B, Jovićević JN. Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium. in Metals. 2020;10(1):88.
doi:10.3390/met10010088 .

Cvetković, Vesna S., Vukićević, Nataša, Milićević-Neumann, Ksenija, Stopić, Srećko, Friedrich, Bernd, Jovićević, Jovan N., "Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium" in Metals, 10, no. 1 (2020):88,
https://doi.org/10.3390/met10010088 . .

TY  - CONF
AU  - Varničić, Miroslava
AU  - Eraković, Sanja
AU  - Pavlović, Miroslav
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5997
AB  - Low cost and highly active electrocatalysts for the oxygen reduction reaction (ORR) are necessary for the development of fuel cells and metal air batteries. Currently, Pt based electrodes have the best catalytic performance but due to is high cost its employment on a significant scale is limmited. Perovskite materials would be a good alternative because of is abundant supply, envronmental benignity, electronic structure, ionic conductivity and redox behavior. Therefore, the aim of this work is synthesis and characterzation of Lanthanum cobalt oxide (LaCoO3) powders doped with Manganese (Mn) - LMCO or Strontium (Sr) - LSCO, as promissing candidates for energy storage and conversion devices. Ultrasonic spray pyrolisis (USP) was used to successfully synthsize spherical sub-microm-m-szed of Lai0.6Sr0.4CoO3 and La0.6Mn0.4CoO3 perovskite type materials. Detailed microscopic analysis (SEM-EDX, TEM, XRD) as well as electrochemical characterization by CV, LSV and EIS technique has been conducted.
PB  - Società Chimica Italiana
C3  - Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy
T1  - Synthesis and electrochemical performance of multicomponent oxide materials toward oxygen reduction reaction
SP  - 126
EP  - 126
UR  - https://hdl.handle.net/21.15107/rcub_cer_5997
ER  - 

@conference{
author = "Varničić, Miroslava and Eraković, Sanja and Pavlović, Miroslav and Stopić, Srećko and Stevanović, Jasmina and Panić, Vladimir and Friedrich, Bernd",
year = "2019",
abstract = "Low cost and highly active electrocatalysts for the oxygen reduction reaction (ORR) are necessary for the development of fuel cells and metal air batteries. Currently, Pt based electrodes have the best catalytic performance but due to is high cost its employment on a significant scale is limmited. Perovskite materials would be a good alternative because of is abundant supply, envronmental benignity, electronic structure, ionic conductivity and redox behavior. Therefore, the aim of this work is synthesis and characterzation of Lanthanum cobalt oxide (LaCoO3) powders doped with Manganese (Mn) - LMCO or Strontium (Sr) - LSCO, as promissing candidates for energy storage and conversion devices. Ultrasonic spray pyrolisis (USP) was used to successfully synthsize spherical sub-microm-m-szed of Lai0.6Sr0.4CoO3 and La0.6Mn0.4CoO3 perovskite type materials. Detailed microscopic analysis (SEM-EDX, TEM, XRD) as well as electrochemical characterization by CV, LSV and EIS technique has been conducted.",
publisher = "Società Chimica Italiana",
journal = "Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy",
title = "Synthesis and electrochemical performance of multicomponent oxide materials toward oxygen reduction reaction",
pages = "126-126",
url = "https://hdl.handle.net/21.15107/rcub_cer_5997"
}

Varničić, M., Eraković, S., Pavlović, M., Stopić, S., Stevanović, J., Panić, V.,& Friedrich, B.. (2019). Synthesis and electrochemical performance of multicomponent oxide materials toward oxygen reduction reaction. in Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy
Società Chimica Italiana., 126-126.
https://hdl.handle.net/21.15107/rcub_cer_5997

Varničić M, Eraković S, Pavlović M, Stopić S, Stevanović J, Panić V, Friedrich B. Synthesis and electrochemical performance of multicomponent oxide materials toward oxygen reduction reaction. in Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy. 2019;:126-126.
https://hdl.handle.net/21.15107/rcub_cer_5997 .

Varničić, Miroslava, Eraković, Sanja, Pavlović, Miroslav, Stopić, Srećko, Stevanović, Jasmina, Panić, Vladimir, Friedrich, Bernd, "Synthesis and electrochemical performance of multicomponent oxide materials toward oxygen reduction reaction" in Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy (2019):126-126,
https://hdl.handle.net/21.15107/rcub_cer_5997 .

TY  - CONF
AU  - Pavlović, Miroslav
AU  - Eraković, Sanja
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6618
AB  - In this study we report of considerable promotion of supercapacitive performances of ruthenium oxide hosted by perovskite-like structure of rare earth–CoO3 composite and vice versa. Spherical, sub-µm-sized, regular spheres of La0.6Sr0.4CoO3 (LSCO) were synthesized by ultrasonic spray pyrolysis (USP). The sphere surface was subsequently hydrothermally doped by RuO2. LSCO and LSCO/RuO2 composites were investigated for their supercapacitive performances in alkaline solution. Microstructure and surface morphology were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that amorphous Ru species decorate the surface of LSCO spheres, and possibly incorporate partially into a B-site of the LSCO lattice. Electrochemical characterization by cyclic voltammetry (CV) clearly revealed that capacitive performances of LSCO are considerably improved by 20 mass% addition of RuO2. The registered capacitance for LSCO/RuO2 reaches the values of USP-synthesized pure RuO2, which reveals the promoting influence of LSCO on RuO2 pseudocapacitance. This intrinsic interactive promotion introduces the LSCO/RuO2 composite as a unique supercapacitive material.
PB  - Zvornik, Republic of Srpska, B&H : Faculty of Technology
C3  - Book of Abstracts - VI International Congress Engineering, Environment and Materials in Processing Industry, March 11-13, Jahorina, Republic of Srpska, Bosnia and Herzegovina
T1  - Promotion of Supercapacitance of Novel Generation Supercapacitors Based on Lanthanum Strontium Cobalt Oxide and Hydrotermal Ruthenium Oxide
SP  - 620
EP  - 629
UR  - https://hdl.handle.net/21.15107/rcub_cer_6618
ER  - 

@conference{
author = "Pavlović, Miroslav and Eraković, Sanja and Stopić, Srećko and Friedrich, Bernd and Stevanović, Jasmina and Panić, Vladimir",
year = "2019",
abstract = "In this study we report of considerable promotion of supercapacitive performances of ruthenium oxide hosted by perovskite-like structure of rare earth–CoO3 composite and vice versa. Spherical, sub-µm-sized, regular spheres of La0.6Sr0.4CoO3 (LSCO) were synthesized by ultrasonic spray pyrolysis (USP). The sphere surface was subsequently hydrothermally doped by RuO2. LSCO and LSCO/RuO2 composites were investigated for their supercapacitive performances in alkaline solution. Microstructure and surface morphology were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that amorphous Ru species decorate the surface of LSCO spheres, and possibly incorporate partially into a B-site of the LSCO lattice. Electrochemical characterization by cyclic voltammetry (CV) clearly revealed that capacitive performances of LSCO are considerably improved by 20 mass% addition of RuO2. The registered capacitance for LSCO/RuO2 reaches the values of USP-synthesized pure RuO2, which reveals the promoting influence of LSCO on RuO2 pseudocapacitance. This intrinsic interactive promotion introduces the LSCO/RuO2 composite as a unique supercapacitive material.",
publisher = "Zvornik, Republic of Srpska, B&H : Faculty of Technology",
journal = "Book of Abstracts - VI International Congress Engineering, Environment and Materials in Processing Industry, March 11-13, Jahorina, Republic of Srpska, Bosnia and Herzegovina",
title = "Promotion of Supercapacitance of Novel Generation Supercapacitors Based on Lanthanum Strontium Cobalt Oxide and Hydrotermal Ruthenium Oxide",
pages = "620-629",
url = "https://hdl.handle.net/21.15107/rcub_cer_6618"
}

Pavlović, M., Eraković, S., Stopić, S., Friedrich, B., Stevanović, J.,& Panić, V.. (2019). Promotion of Supercapacitance of Novel Generation Supercapacitors Based on Lanthanum Strontium Cobalt Oxide and Hydrotermal Ruthenium Oxide. in Book of Abstracts - VI International Congress Engineering, Environment and Materials in Processing Industry, March 11-13, Jahorina, Republic of Srpska, Bosnia and Herzegovina
Zvornik, Republic of Srpska, B&H : Faculty of Technology., 620-629.
https://hdl.handle.net/21.15107/rcub_cer_6618

Pavlović M, Eraković S, Stopić S, Friedrich B, Stevanović J, Panić V. Promotion of Supercapacitance of Novel Generation Supercapacitors Based on Lanthanum Strontium Cobalt Oxide and Hydrotermal Ruthenium Oxide. in Book of Abstracts - VI International Congress Engineering, Environment and Materials in Processing Industry, March 11-13, Jahorina, Republic of Srpska, Bosnia and Herzegovina. 2019;:620-629.
https://hdl.handle.net/21.15107/rcub_cer_6618 .

Pavlović, Miroslav, Eraković, Sanja, Stopić, Srećko, Friedrich, Bernd, Stevanović, Jasmina, Panić, Vladimir, "Promotion of Supercapacitance of Novel Generation Supercapacitors Based on Lanthanum Strontium Cobalt Oxide and Hydrotermal Ruthenium Oxide" in Book of Abstracts - VI International Congress Engineering, Environment and Materials in Processing Industry, March 11-13, Jahorina, Republic of Srpska, Bosnia and Herzegovina (2019):620-629,
https://hdl.handle.net/21.15107/rcub_cer_6618 .

TY  - CONF
AU  - Eraković, Sanja
AU  - Pavlović, Miroslav
AU  - Stopić, Srećko
AU  - Mitrić, Miodrag
AU  - Varničić, Miroslava
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6656
AB  - Perovskite have emerged as promising materials in newly invented energy storage and conversion devices due to their exceptional thermal stability, electronic structure, ionic conductivity, electron mobility, and redox behaviour [1]. Among perovskite that are suitable as catalyst for electrode in supercapacitors and solid oxide fuel cells, lanthanum strontium cobalt oxides have shown promising catalytic activity and relatively high stability [1]. Also, Co-based lanthanum manganite (LMCO) has been used as cathode material with a high electro-chemical catalytic activity for oxygen reduction[2].Ultrasonic spray pyrolysis (USP) was used to successfully synthesize spherical sub-µm-sized of La0.6Sr0.4CoO3 (LSCO) and Mn and Sr-doped LaCoO3 powders. LSCO should be of wider voltage window than carbonaceous materials, with the possibility to adopt the pseudocapacitive oxide, such as RuO2, not only by simple surface adsorption, but over full or partial incorporation into the oxide structure. Hence, this work aims to investigate supercapacitive potentials of pure LSCO prepared by single step USP and LSCO doped with RuO2. The catalytic activity of Sr and Mn cation substitution in lanthanum cobalt oxide was also investigated. Electrochemical behaviour was investigated by EIS, CV and LSV techniques. The EIS and CV analyses showed that RuO2 catalyzes the redox transition of Co species, with simultaneous proportional increase in pseudocapacitive abilities of RuO2 itself while being hosted by LSCO. The investigated LMCO electrodes by CV and LSV techniques showed excellent catalytic activity for oxygen reduction. Our work indicated that these perovskite shows potential applications in the field of pseudocapacitance electrode materials and is worthy of further investigation.
PB  - International Association of Physical Chemists
C3  - Book of abstracts - 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, May 27-30, Split, Croatia
T1  - Electrochemical performances of rare earth Co-based mixed oxides and their application as supercapacitors and fuel cells
SP  - 116
EP  - 116
UR  - https://hdl.handle.net/21.15107/rcub_cer_6656
ER  - 

@conference{
author = "Eraković, Sanja and Pavlović, Miroslav and Stopić, Srećko and Mitrić, Miodrag and Varničić, Miroslava and Stevanović, Jasmina and Panić, Vladimir and Friedrich, Bernd",
year = "2019",
abstract = "Perovskite have emerged as promising materials in newly invented energy storage and conversion devices due to their exceptional thermal stability, electronic structure, ionic conductivity, electron mobility, and redox behaviour [1]. Among perovskite that are suitable as catalyst for electrode in supercapacitors and solid oxide fuel cells, lanthanum strontium cobalt oxides have shown promising catalytic activity and relatively high stability [1]. Also, Co-based lanthanum manganite (LMCO) has been used as cathode material with a high electro-chemical catalytic activity for oxygen reduction[2].Ultrasonic spray pyrolysis (USP) was used to successfully synthesize spherical sub-µm-sized of La0.6Sr0.4CoO3 (LSCO) and Mn and Sr-doped LaCoO3 powders. LSCO should be of wider voltage window than carbonaceous materials, with the possibility to adopt the pseudocapacitive oxide, such as RuO2, not only by simple surface adsorption, but over full or partial incorporation into the oxide structure. Hence, this work aims to investigate supercapacitive potentials of pure LSCO prepared by single step USP and LSCO doped with RuO2. The catalytic activity of Sr and Mn cation substitution in lanthanum cobalt oxide was also investigated. Electrochemical behaviour was investigated by EIS, CV and LSV techniques. The EIS and CV analyses showed that RuO2 catalyzes the redox transition of Co species, with simultaneous proportional increase in pseudocapacitive abilities of RuO2 itself while being hosted by LSCO. The investigated LMCO electrodes by CV and LSV techniques showed excellent catalytic activity for oxygen reduction. Our work indicated that these perovskite shows potential applications in the field of pseudocapacitance electrode materials and is worthy of further investigation.",
publisher = "International Association of Physical Chemists",
journal = "Book of abstracts - 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, May 27-30, Split, Croatia",
title = "Electrochemical performances of rare earth Co-based mixed oxides and their application as supercapacitors and fuel cells",
pages = "116-116",
url = "https://hdl.handle.net/21.15107/rcub_cer_6656"
}

Eraković, S., Pavlović, M., Stopić, S., Mitrić, M., Varničić, M., Stevanović, J., Panić, V.,& Friedrich, B.. (2019). Electrochemical performances of rare earth Co-based mixed oxides and their application as supercapacitors and fuel cells. in Book of abstracts - 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, May 27-30, Split, Croatia
International Association of Physical Chemists., 116-116.
https://hdl.handle.net/21.15107/rcub_cer_6656

Eraković S, Pavlović M, Stopić S, Mitrić M, Varničić M, Stevanović J, Panić V, Friedrich B. Electrochemical performances of rare earth Co-based mixed oxides and their application as supercapacitors and fuel cells. in Book of abstracts - 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, May 27-30, Split, Croatia. 2019;:116-116.
https://hdl.handle.net/21.15107/rcub_cer_6656 .

Eraković, Sanja, Pavlović, Miroslav, Stopić, Srećko, Mitrić, Miodrag, Varničić, Miroslava, Stevanović, Jasmina, Panić, Vladimir, Friedrich, Bernd, "Electrochemical performances of rare earth Co-based mixed oxides and their application as supercapacitors and fuel cells" in Book of abstracts - 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, May 27-30, Split, Croatia (2019):116-116,
https://hdl.handle.net/21.15107/rcub_cer_6656 .

TY  - CONF
AU  - Pavlović, Miroslav
AU  - Eraković, Sanja
AU  - Varničić, Miroslava
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6660
AB  - Considerable promotion of A’ substituted AA’BO3 perovskite-like structure of rare earth–CoO3 composite supercapacitive performances is reported. The influence of cation substitution in perovskite structure on supercapacitance was also investigated. Spherical, sub-µm-sized, regular spheres of La0.6Sr0.4CoO3 (LSCO) and LaCoO3 (LCO) were synthesized by ultrasonic spray pyrolysis under different temperatures. The synthesis of Co-based oxide, namely La0.6Sr0.4CoO3 (LSCO), was performed within single-step USP procedure. As starting precursors aqueous solutions with 0.10 M concentration of La(NO3)3·6H2O (99.9% rare earth oxide), Sr(NO3)2 (99 %) and Co(NO3)2 (98%) were used for the synthesis of LSCO, and aqueous solutions with 0.10 M concentration of La(NO3)3·6H2O (99.9% rare earth oxide) and Co(NO3)2 (98%) were used for synthesis of LCO. The solution for the LSCO and LCO synthesis were prepared by mixing starting precursor solutions in stoichiometric mole ratios. Synthesis temperatures were adjusted and kept to 600°C and 800°C. LSCO and LCO composites were investigated for their supercapacitive performances in alkaline solution. Microstructure and surface morphology were studied by Scanning Electron Microscopy and X-ray Diffraction measurements. Electrochemical characterization of all LCO and LSCO samples included cyclic voltammetry (CV), galvanostatic charge-discharge (G C/DC) and electrochemical impedance spectroscopy (EIS). The registered capacitance for LSCO reveals the promoting influence of Sr on A’ position in perovskite on capacitance. The EIS analysis showed that Sr catalyzes the redox transition of Co species, with simultaneous proportional increase in capacitive abilities. This intrinsic interactive promotion introduces LSCO composite as unique supercapacitive material. Synthesis temperature plays important role on supercapacitive performances.
PB  - Società Chimica Italiana
C3  - Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy
T1  - Influence of A’ cation substitution on promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres
SP  - 180
EP  - 180
UR  - https://hdl.handle.net/21.15107/rcub_cer_6660
ER  - 

@conference{
author = "Pavlović, Miroslav and Eraković, Sanja and Varničić, Miroslava and Stopić, Srećko and Stevanović, Jasmina and Friedrich, Bernd and Panić, Vladimir",
year = "2019",
abstract = "Considerable promotion of A’ substituted AA’BO3 perovskite-like structure of rare earth–CoO3 composite supercapacitive performances is reported. The influence of cation substitution in perovskite structure on supercapacitance was also investigated. Spherical, sub-µm-sized, regular spheres of La0.6Sr0.4CoO3 (LSCO) and LaCoO3 (LCO) were synthesized by ultrasonic spray pyrolysis under different temperatures. The synthesis of Co-based oxide, namely La0.6Sr0.4CoO3 (LSCO), was performed within single-step USP procedure. As starting precursors aqueous solutions with 0.10 M concentration of La(NO3)3·6H2O (99.9% rare earth oxide), Sr(NO3)2 (99 %) and Co(NO3)2 (98%) were used for the synthesis of LSCO, and aqueous solutions with 0.10 M concentration of La(NO3)3·6H2O (99.9% rare earth oxide) and Co(NO3)2 (98%) were used for synthesis of LCO. The solution for the LSCO and LCO synthesis were prepared by mixing starting precursor solutions in stoichiometric mole ratios. Synthesis temperatures were adjusted and kept to 600°C and 800°C. LSCO and LCO composites were investigated for their supercapacitive performances in alkaline solution. Microstructure and surface morphology were studied by Scanning Electron Microscopy and X-ray Diffraction measurements. Electrochemical characterization of all LCO and LSCO samples included cyclic voltammetry (CV), galvanostatic charge-discharge (G C/DC) and electrochemical impedance spectroscopy (EIS). The registered capacitance for LSCO reveals the promoting influence of Sr on A’ position in perovskite on capacitance. The EIS analysis showed that Sr catalyzes the redox transition of Co species, with simultaneous proportional increase in capacitive abilities. This intrinsic interactive promotion introduces LSCO composite as unique supercapacitive material. Synthesis temperature plays important role on supercapacitive performances.",
publisher = "Società Chimica Italiana",
journal = "Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy",
title = "Influence of A’ cation substitution on promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres",
pages = "180-180",
url = "https://hdl.handle.net/21.15107/rcub_cer_6660"
}

Pavlović, M., Eraković, S., Varničić, M., Stopić, S., Stevanović, J., Friedrich, B.,& Panić, V.. (2019). Influence of A’ cation substitution on promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres. in Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy
Società Chimica Italiana., 180-180.
https://hdl.handle.net/21.15107/rcub_cer_6660

Pavlović M, Eraković S, Varničić M, Stopić S, Stevanović J, Friedrich B, Panić V. Influence of A’ cation substitution on promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres. in Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy. 2019;:180-180.
https://hdl.handle.net/21.15107/rcub_cer_6660 .

Pavlović, Miroslav, Eraković, Sanja, Varničić, Miroslava, Stopić, Srećko, Stevanović, Jasmina, Friedrich, Bernd, Panić, Vladimir, "Influence of A’ cation substitution on promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres" in Program and book of abstracts - Giornate dell’Elettrochimica Italiana - GEI 2019 Electrochemistry: from Theory to Industrial Applications, 8-12 September, Padova, Italy (2019):180-180,
https://hdl.handle.net/21.15107/rcub_cer_6660 .

TY  - CONF
AU  - Cvetković, Vesna S.
AU  - Vukićević, Nataša M.
AU  - Milićević, Ksenija
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
AU  - Jovićević, Jovan N.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6158
AB  - Electrodeposition of Al-Ti based materials is an attractive process offering
many advantages over more conventional processing methods. A number of articles on
aluminium-titanium intermetallics electrodeposited from electrolyte made of 2AlCb+NaCl or
from ionic liquid (IL) AlCb- 1-ethyl-3-methylimidazolium chloride have been reported. We
are reporting on Al-Ti electrodeposition from equimolar chloroaluminate molten salt
containing up to 0.97 at.% Ti ions added into the electrolyte by potentiostatic dissolution of a
titanium plate at 200°C. Titanium dissolution and titanium and aluminium depositions were
conducted by linear sweep voltammetry and chronoamperometry. The working electrodes
used were titanium and glassy carbon (GC). The voltammograms obtained in the electrolyte
without in advance introduced Ti ions indicated titanium and alwrunium deposition and
anodic responses characteristics of Al, Ti and Alffi alloys dissolutions. The voltammograms
on Ti from the electrolyte with Ti ions reiterated the said results exhibiting higher current
densities under the same conditions. The voltammograms on glassy carbon electrode done in
equimolar chloroaluminate molten salt with Ti ions present confirmed the general picture
already seen with Ti working electrode under the same conditions, Al and Ti deposition.
PB  - Romanian Chemical Society
C3  - Book of abstracts - 9th International Conference of the Chemical Societies of the South-East European Countries, May 8-11 2019, Targoviste, romania
T1  - Electrochemical deposition of titanium and aluminium from equimolar AlCl3+NaCl melt
SP  - S4_P_04
UR  - https://hdl.handle.net/21.15107/rcub_cer_6158
ER  - 

@conference{
author = "Cvetković, Vesna S. and Vukićević, Nataša M. and Milićević, Ksenija and Stopić, Srećko and Friedrich, Bernd and Jovićević, Jovan N.",
year = "2019",
abstract = "Electrodeposition of Al-Ti based materials is an attractive process offering
many advantages over more conventional processing methods. A number of articles on
aluminium-titanium intermetallics electrodeposited from electrolyte made of 2AlCb+NaCl or
from ionic liquid (IL) AlCb- 1-ethyl-3-methylimidazolium chloride have been reported. We
are reporting on Al-Ti electrodeposition from equimolar chloroaluminate molten salt
containing up to 0.97 at.% Ti ions added into the electrolyte by potentiostatic dissolution of a
titanium plate at 200°C. Titanium dissolution and titanium and aluminium depositions were
conducted by linear sweep voltammetry and chronoamperometry. The working electrodes
used were titanium and glassy carbon (GC). The voltammograms obtained in the electrolyte
without in advance introduced Ti ions indicated titanium and alwrunium deposition and
anodic responses characteristics of Al, Ti and Alffi alloys dissolutions. The voltammograms
on Ti from the electrolyte with Ti ions reiterated the said results exhibiting higher current
densities under the same conditions. The voltammograms on glassy carbon electrode done in
equimolar chloroaluminate molten salt with Ti ions present confirmed the general picture
already seen with Ti working electrode under the same conditions, Al and Ti deposition.",
publisher = "Romanian Chemical Society",
journal = "Book of abstracts - 9th International Conference of the Chemical Societies of the South-East European Countries, May 8-11 2019, Targoviste, romania",
title = "Electrochemical deposition of titanium and aluminium from equimolar AlCl3+NaCl melt",
pages = "S4_P_04",
url = "https://hdl.handle.net/21.15107/rcub_cer_6158"
}

Cvetković, V. S., Vukićević, N. M., Milićević, K., Stopić, S., Friedrich, B.,& Jovićević, J. N.. (2019). Electrochemical deposition of titanium and aluminium from equimolar AlCl3+NaCl melt. in Book of abstracts - 9th International Conference of the Chemical Societies of the South-East European Countries, May 8-11 2019, Targoviste, romania
Romanian Chemical Society., S4_P_04.
https://hdl.handle.net/21.15107/rcub_cer_6158

Cvetković VS, Vukićević NM, Milićević K, Stopić S, Friedrich B, Jovićević JN. Electrochemical deposition of titanium and aluminium from equimolar AlCl3+NaCl melt. in Book of abstracts - 9th International Conference of the Chemical Societies of the South-East European Countries, May 8-11 2019, Targoviste, romania. 2019;:S4_P_04.
https://hdl.handle.net/21.15107/rcub_cer_6158 .

Cvetković, Vesna S., Vukićević, Nataša M., Milićević, Ksenija, Stopić, Srećko, Friedrich, Bernd, Jovićević, Jovan N., "Electrochemical deposition of titanium and aluminium from equimolar AlCl3+NaCl melt" in Book of abstracts - 9th International Conference of the Chemical Societies of the South-East European Countries, May 8-11 2019, Targoviste, romania (2019):S4_P_04,
https://hdl.handle.net/21.15107/rcub_cer_6158 .

TY  - JOUR
AU  - Košević, Milica
AU  - Stopić, Srećko
AU  - Cvetković, Vesna S.
AU  - Schroeder, Michael
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2500
AB  - Uniformly-shaped, spherical RuO2/TiO2 particles were synthesized exclusively by one-step ultrasonic spray pyrolysis USP) of a mixture of n-butylorthotitanate and ruthenium chloride acidic aqueous solutions. The USP temperature was 200 degrees C -quite below the typical conversion temperatures of the precursors to the oxides. Basic electrochemical properties of RuO2/TiO2 USP powders as-prepared or additionally dried and/or thermally treated) in the form of a thin layer applied onto glassy carbon electrode are investigated and compared to the properties of powder synthesized at quite higher temperature of 800 degrees C. The coatings of activated titanium anode ATA) were prepared from RuO2/TiO2 USP powders in order to check the anode electrolysis stability and to correlate the anode properties to those of native USP powders. Low-temperature material showed much better performances than high-temperature one. ATA obtained from low-temperature USP powder showed considerably higher stability. The obtained results are found to be in close correlation to the powder and coating structure, composition and morphology affected by subsequent thermal treatment of the material synthesized at low USP temperature.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances
VL  - 464
SP  - 1
EP  - 9
DO  - 10.1016/j.apsusc.2018.09.066
ER  - 

@article{
author = "Košević, Milica and Stopić, Srećko and Cvetković, Vesna S. and Schroeder, Michael and Stevanović, Jasmina and Panić, Vladimir and Friedrich, Bernd",
year = "2019",
abstract = "Uniformly-shaped, spherical RuO2/TiO2 particles were synthesized exclusively by one-step ultrasonic spray pyrolysis USP) of a mixture of n-butylorthotitanate and ruthenium chloride acidic aqueous solutions. The USP temperature was 200 degrees C -quite below the typical conversion temperatures of the precursors to the oxides. Basic electrochemical properties of RuO2/TiO2 USP powders as-prepared or additionally dried and/or thermally treated) in the form of a thin layer applied onto glassy carbon electrode are investigated and compared to the properties of powder synthesized at quite higher temperature of 800 degrees C. The coatings of activated titanium anode ATA) were prepared from RuO2/TiO2 USP powders in order to check the anode electrolysis stability and to correlate the anode properties to those of native USP powders. Low-temperature material showed much better performances than high-temperature one. ATA obtained from low-temperature USP powder showed considerably higher stability. The obtained results are found to be in close correlation to the powder and coating structure, composition and morphology affected by subsequent thermal treatment of the material synthesized at low USP temperature.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances",
volume = "464",
pages = "1-9",
doi = "10.1016/j.apsusc.2018.09.066"
}

Košević, M., Stopić, S., Cvetković, V. S., Schroeder, M., Stevanović, J., Panić, V.,& Friedrich, B.. (2019). Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances. in Applied Surface Science
Elsevier., 464, 1-9.
https://doi.org/10.1016/j.apsusc.2018.09.066

Košević M, Stopić S, Cvetković VS, Schroeder M, Stevanović J, Panić V, Friedrich B. Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances. in Applied Surface Science. 2019;464:1-9.
doi:10.1016/j.apsusc.2018.09.066 .

Košević, Milica, Stopić, Srećko, Cvetković, Vesna S., Schroeder, Michael, Stevanović, Jasmina, Panić, Vladimir, Friedrich, Bernd, "Mixed RuO2/TiO2 uniform microspheres synthesized by low-temperature ultrasonic spray pyrolysis and their advanced electrochemical performances" in Applied Surface Science, 464 (2019):1-9,
https://doi.org/10.1016/j.apsusc.2018.09.066 . .

TY  - JOUR
AU  - Eraković, Sanja
AU  - Pavlović, Miroslav M.
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina
AU  - Mitrić, Miodrag
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3207
AB  - Considerable promotion of RuO2 hosted by perovskite-like structure of rare eartheCoO3 composite and
vice versa supercapacitive performances is reported. Spherical, sub-mm-sized, regular spheres of
La0.6Sr0.4CoO3 (LSCO), were synthesized by ultrasonic spray pyrolysis. The sphere surface was subsequently
hydrothermally doped by RuO2. LSCO and LSCO/RuO2 composites were investigated for their
supercapacitive performances in alkaline solution. Microstructure and surface morphology were studied
by SEM and XRD. It was found that amorphous Ru species decorate LSCO surface, and possibly incorporate
partially into B-site of the LSCO lattice. Electrochemical characterization by cyclic voltammetry
(CV), galvanostatic charge-discharge (G-C/DC) and electrochemical impedance spectroscopy (EIS) clearly
revealed that capacitive performances of LSCO are considerably improved by addition of 20 mass. % of
RuO2. The registered capacitance for LSCO/RuO2 reaches the values of pure RuO2, which reveals the
promoting influence of LSCO on RuO2 pseudocapacitance. The EIS analysis showed that RuO2 catalyzes
the redox transition of Co species, with simultaneous proportional increase in pseudocapacitive RuO2
abilities while being hosted by LSCO. This intrinsic interactive promotion introduces LSCO/RuO2 composite
as unique supercapacitive material. G-C/DC curves showed that LSCO/RuO2 is of modest cyclability
with respect to pure LSCO and RuO2, although the capacitance losses with cycling are acceptably low.
PB  - Elsevier
T2  - Electrochimica Acta
T1  - Interactive promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres hosting the hydrothermal ruthenium oxide
VL  - 321
SP  - 134721
DO  - 10.1016/j.electacta.2019.134721
ER  - 

@article{
author = "Eraković, Sanja and Pavlović, Miroslav M. and Stopić, Srećko and Stevanović, Jasmina and Mitrić, Miodrag and Friedrich, Bernd and Panić, Vladimir",
year = "2019",
abstract = "Considerable promotion of RuO2 hosted by perovskite-like structure of rare eartheCoO3 composite and
vice versa supercapacitive performances is reported. Spherical, sub-mm-sized, regular spheres of
La0.6Sr0.4CoO3 (LSCO), were synthesized by ultrasonic spray pyrolysis. The sphere surface was subsequently
hydrothermally doped by RuO2. LSCO and LSCO/RuO2 composites were investigated for their
supercapacitive performances in alkaline solution. Microstructure and surface morphology were studied
by SEM and XRD. It was found that amorphous Ru species decorate LSCO surface, and possibly incorporate
partially into B-site of the LSCO lattice. Electrochemical characterization by cyclic voltammetry
(CV), galvanostatic charge-discharge (G-C/DC) and electrochemical impedance spectroscopy (EIS) clearly
revealed that capacitive performances of LSCO are considerably improved by addition of 20 mass. % of
RuO2. The registered capacitance for LSCO/RuO2 reaches the values of pure RuO2, which reveals the
promoting influence of LSCO on RuO2 pseudocapacitance. The EIS analysis showed that RuO2 catalyzes
the redox transition of Co species, with simultaneous proportional increase in pseudocapacitive RuO2
abilities while being hosted by LSCO. This intrinsic interactive promotion introduces LSCO/RuO2 composite
as unique supercapacitive material. G-C/DC curves showed that LSCO/RuO2 is of modest cyclability
with respect to pure LSCO and RuO2, although the capacitance losses with cycling are acceptably low.",
publisher = "Elsevier",
journal = "Electrochimica Acta",
title = "Interactive promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres hosting the hydrothermal ruthenium oxide",
volume = "321",
pages = "134721",
doi = "10.1016/j.electacta.2019.134721"
}

Eraković, S., Pavlović, M. M., Stopić, S., Stevanović, J., Mitrić, M., Friedrich, B.,& Panić, V.. (2019). Interactive promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres hosting the hydrothermal ruthenium oxide. in Electrochimica Acta
Elsevier., 321, 134721.
https://doi.org/10.1016/j.electacta.2019.134721

Eraković S, Pavlović MM, Stopić S, Stevanović J, Mitrić M, Friedrich B, Panić V. Interactive promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres hosting the hydrothermal ruthenium oxide. in Electrochimica Acta. 2019;321:134721.
doi:10.1016/j.electacta.2019.134721 .

Eraković, Sanja, Pavlović, Miroslav M., Stopić, Srećko, Stevanović, Jasmina, Mitrić, Miodrag, Friedrich, Bernd, Panić, Vladimir, "Interactive promotion of supercapacitance of rare earth/CoO3-based spray pyrolytic perovskite microspheres hosting the hydrothermal ruthenium oxide" in Electrochimica Acta, 321 (2019):134721,
https://doi.org/10.1016/j.electacta.2019.134721 . .

TY  - CHAP
AU  - Šekularac, Gavrilo
AU  - Eraković, Sanja
AU  - Stopić, Srećko
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4357
AB  - Supercapacitors are one of the most promising devices for energy storage, which can, in the highest extent, bridge the batteries/capacitors energy/power gap. Ruthenium oxide is one of the most powerful, with superior pseudocapacitive properties and high theoretical specific capacitance, depending on its structure. It has widespread application in many fields, one of which is as a coating of dimensionally stable anodes (DSA). Different methods for the synthesis of RuO2 are presented, such as the thermal decomposition of RuCl3, the sol-gel process, the polyol process, the silar method, hydrothermal synthesis, spray pyrolysis, the evaporation-induced self-assembly (EISA) method, electrochemical deposition, chemical deposition from the vapor phase, etc. In
recent years, microwave (MW)-assisted procedures were shown to be powerful techniques for the synthesis of a variety of materials, especially metal oxides, through hydrothermal routes. Highly active RuO2 coatings on Ti could be prepared from colloidal suspensions of the oxide synthesized under the rigorous heating conditions induced by microwave irradiation. Intensification of the heating conditions by increased reaction temperatures and pressures produced small particles and increased the surface energy. The most rapid heating conditions generated the smallest high-energy oxide particles, which were able to form compact RuO2 coatings with high electrochemical activity. The coating capacitive performances and the activity for oxygen evolution seemed considerably improved with respect to those of the coating prepared by the traditional thermal decomposition of chloride or usual hydrothermal processing routes. The synthesised material is of highly accessible inner structure, and is an excellent candidate for both low and high power applications.
PB  -  New York, USA : Nova Science Publishers Inc.
T2  - Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
T1  - Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures
SP  - 67
EP  - 118
UR  - https://hdl.handle.net/21.15107/rcub_cer_4357
ER  - 

@inbook{
author = "Šekularac, Gavrilo and Eraković, Sanja and Stopić, Srećko",
year = "2019",
abstract = "Supercapacitors are one of the most promising devices for energy storage, which can, in the highest extent, bridge the batteries/capacitors energy/power gap. Ruthenium oxide is one of the most powerful, with superior pseudocapacitive properties and high theoretical specific capacitance, depending on its structure. It has widespread application in many fields, one of which is as a coating of dimensionally stable anodes (DSA). Different methods for the synthesis of RuO2 are presented, such as the thermal decomposition of RuCl3, the sol-gel process, the polyol process, the silar method, hydrothermal synthesis, spray pyrolysis, the evaporation-induced self-assembly (EISA) method, electrochemical deposition, chemical deposition from the vapor phase, etc. In
recent years, microwave (MW)-assisted procedures were shown to be powerful techniques for the synthesis of a variety of materials, especially metal oxides, through hydrothermal routes. Highly active RuO2 coatings on Ti could be prepared from colloidal suspensions of the oxide synthesized under the rigorous heating conditions induced by microwave irradiation. Intensification of the heating conditions by increased reaction temperatures and pressures produced small particles and increased the surface energy. The most rapid heating conditions generated the smallest high-energy oxide particles, which were able to form compact RuO2 coatings with high electrochemical activity. The coating capacitive performances and the activity for oxygen evolution seemed considerably improved with respect to those of the coating prepared by the traditional thermal decomposition of chloride or usual hydrothermal processing routes. The synthesised material is of highly accessible inner structure, and is an excellent candidate for both low and high power applications.",
publisher = " New York, USA : Nova Science Publishers Inc.",
journal = "Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics",
booktitle = "Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures",
pages = "67-118",
url = "https://hdl.handle.net/21.15107/rcub_cer_4357"
}

Šekularac, G., Eraković, S.,& Stopić, S.. (2019). Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics
 New York, USA : Nova Science Publishers Inc.., 67-118.
https://hdl.handle.net/21.15107/rcub_cer_4357

Šekularac G, Eraković S, Stopić S. Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures. in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics. 2019;:67-118.
https://hdl.handle.net/21.15107/rcub_cer_4357 .

Šekularac, Gavrilo, Eraković, Sanja, Stopić, Srećko, "Innovative Approaches Toward the Synthesis of Electroactive RuO2-based Materials of Intrinsic Structures" in Metals and Metal-Based Electrocatalytic Materials for Alternative Energy Sources and Electronics (2019):67-118,
https://hdl.handle.net/21.15107/rcub_cer_4357 .

TY  - JOUR
AU  - Košević, Milica
AU  - Vukićević, Nataša
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina
AU  - Friedrich, Bernd
AU  - Panić, Vladimir
AU  - Nikolić, Branislav
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3039
AB  - Spherical TiO2/RuO2 particles were synthesized by ultrasonic spray pyrolysis (USP) at 200 and 800◦C. The activity for the oxygen and chlorine evolution reactions (OER and CER, respectively) and the dynamic responses from electrochemical impedance spectroscopy (EIS) of the USP powders, as well as of the corresponding coatings on Ti, were analyzed and are discussed. The loss of coating activity is discussed with respect to the differences in the EIS and cyclic voltammetry responses of the coatings in their active and inactive states. The 800°C-USP sample was found to be more active than the 200°C-USP sample for both the CER and the OER, whereas the stability of the former was considerably lower. The correlation between the structure, composition and morphology of the powder and the coating with the registered electrochemical properties is discussed. The EIS analysis of the coating resistance distributions induced by the thermal treatment of the powder indicated a complex combination of the pore resistance and the pseudocapacitive charge transfer resistance. An additional coating resistance, due to loose grain boundaries, was introduced into the coatings in their active and inactive state. The EIS analysis indicated the changes in TiO2-enriched core/RuO2-enriched shell structure, caused by the USP temperature. © The Author(s) 2018. Published by ECS.
PB  - Electrochemical Society
T2  - Journal of The Electrochemical Society
T1  - Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres
VL  - 165
IS  - 15
SP  - J3363
EP  - J3370
DO  - 10.1149/2.0521815jes
ER  - 

@article{
author = "Košević, Milica and Vukićević, Nataša and Stopić, Srećko and Stevanović, Jasmina and Friedrich, Bernd and Panić, Vladimir and Nikolić, Branislav",
year = "2018",
abstract = "Spherical TiO2/RuO2 particles were synthesized by ultrasonic spray pyrolysis (USP) at 200 and 800◦C. The activity for the oxygen and chlorine evolution reactions (OER and CER, respectively) and the dynamic responses from electrochemical impedance spectroscopy (EIS) of the USP powders, as well as of the corresponding coatings on Ti, were analyzed and are discussed. The loss of coating activity is discussed with respect to the differences in the EIS and cyclic voltammetry responses of the coatings in their active and inactive states. The 800°C-USP sample was found to be more active than the 200°C-USP sample for both the CER and the OER, whereas the stability of the former was considerably lower. The correlation between the structure, composition and morphology of the powder and the coating with the registered electrochemical properties is discussed. The EIS analysis of the coating resistance distributions induced by the thermal treatment of the powder indicated a complex combination of the pore resistance and the pseudocapacitive charge transfer resistance. An additional coating resistance, due to loose grain boundaries, was introduced into the coatings in their active and inactive state. The EIS analysis indicated the changes in TiO2-enriched core/RuO2-enriched shell structure, caused by the USP temperature. © The Author(s) 2018. Published by ECS.",
publisher = "Electrochemical Society",
journal = "Journal of The Electrochemical Society",
title = "Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres",
volume = "165",
number = "15",
pages = "J3363-J3370",
doi = "10.1149/2.0521815jes"
}

Košević, M., Vukićević, N., Stopić, S., Stevanović, J., Friedrich, B., Panić, V.,& Nikolić, B.. (2018). Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres. in Journal of The Electrochemical Society
Electrochemical Society., 165(15), J3363-J3370.
https://doi.org/10.1149/2.0521815jes

Košević M, Vukićević N, Stopić S, Stevanović J, Friedrich B, Panić V, Nikolić B. Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres. in Journal of The Electrochemical Society. 2018;165(15):J3363-J3370.
doi:10.1149/2.0521815jes .

Košević, Milica, Vukićević, Nataša, Stopić, Srećko, Stevanović, Jasmina, Friedrich, Bernd, Panić, Vladimir, Nikolić, Branislav, "Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO2@RuO2 Microspheres" in Journal of The Electrochemical Society, 165, no. 15 (2018):J3363-J3370,
https://doi.org/10.1149/2.0521815jes . .

TY  - CONF
AU  - Mihailović, Marija
AU  - Stevanović, Jasmina
AU  - Stopić, Srećko
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2650
AB  - Sol-gel processing of ordered MnO2 structures
 toward enhanced O2 reduction catalysis for air batteries
T1  - Sol-gel processing of ordered MnO2 structures  toward enhanced O2 reduction catalysis for air batteries
UR  - https://hdl.handle.net/21.15107/rcub_cer_2650
ER  - 

@conference{
author = "Mihailović, Marija and Stevanović, Jasmina and Stopić, Srećko and Panić, Vladimir and Friedrich, Bernd",
year = "2018",
abstract = "Sol-gel processing of ordered MnO2 structures
 toward enhanced O2 reduction catalysis for air batteries",
title = "Sol-gel processing of ordered MnO2 structures  toward enhanced O2 reduction catalysis for air batteries",
url = "https://hdl.handle.net/21.15107/rcub_cer_2650"
}

Mihailović, M., Stevanović, J., Stopić, S., Panić, V.,& Friedrich, B.. (2018). Sol-gel processing of ordered MnO2 structures  toward enhanced O2 reduction catalysis for air batteries. .
https://hdl.handle.net/21.15107/rcub_cer_2650

Mihailović M, Stevanović J, Stopić S, Panić V, Friedrich B. Sol-gel processing of ordered MnO2 structures  toward enhanced O2 reduction catalysis for air batteries. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_2650 .

Mihailović, Marija, Stevanović, Jasmina, Stopić, Srećko, Panić, Vladimir, Friedrich, Bernd, "Sol-gel processing of ordered MnO2 structures  toward enhanced O2 reduction catalysis for air batteries" (2018),
https://hdl.handle.net/21.15107/rcub_cer_2650 .

TY  - CONF
AU  - Eraković, Sanja
AU  - Pavlović, Miroslav M.
AU  - Stopić, Srećko
AU  - Stevanović, Jasmina
AU  - Panić, Vladimir
AU  - Friedrich, Bernd
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2651
AB  - The supercapacitive charging/discharging (C/DC) response of lanthanum-based perovskite oxides,
obtained by ultrasonic spray pyrolysis (USP), was discussed according to galvanostatic and the
dynamic ac impedance C/DC data. We have synthesized perovskite type lanthanum strontium cobalt
oxide (LSCO, La0.6Sr0.4CoO3) by USP and mixed LSCO/RuO2 by subsequent hydrothermal
impregnation method. The obtained composites were investigated as electrode for electrochemical
supercapacitors and their electrochemical performances have been investigated. Microstructures
and surface morphologies, observed by scanning electron microscopy, appears crystalline with
spherically-shaped nm-sized particles. The aim of our work was study of structural and
electrochemical properties of ternary perovskite and LSCO/RuO2 as a supecapacitive material of
improved stability with respect to carbonaceous ones. Potentiostatic ac impedance analysis has
indicated lower charge transfer resistance of the LSCO/RuO2 sample confirming its enhanced
electrochemical performances. The measurements indicated that nanocomposite LSCO/RuO2 is more
suitable catalytic material with improved electrochemical performances.
PB  - Beograd: Udruženje inženjera Srbije za koroziju i zaštitu materijala (UISKOZAM)
PB  - Beograd: Naučna ustanova za hemiju, tehnologiju i metalurgiju, Institut od nacionalnog značaja
C3  - Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XX YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova/ Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XX YuCorr International Conference - proceedings [May 21-24, 2018, Tara Mountain, Serbia]
T1  - Improvement of the supercapacitor characteristics of perovskite oxides upon impregnation by RuO2
SP  - 136
EP  - 141
UR  - https://hdl.handle.net/21.15107/rcub_cer_2651
ER  - 

@conference{
author = "Eraković, Sanja and Pavlović, Miroslav M. and Stopić, Srećko and Stevanović, Jasmina and Panić, Vladimir and Friedrich, Bernd",
year = "2018",
abstract = "The supercapacitive charging/discharging (C/DC) response of lanthanum-based perovskite oxides,
obtained by ultrasonic spray pyrolysis (USP), was discussed according to galvanostatic and the
dynamic ac impedance C/DC data. We have synthesized perovskite type lanthanum strontium cobalt
oxide (LSCO, La0.6Sr0.4CoO3) by USP and mixed LSCO/RuO2 by subsequent hydrothermal
impregnation method. The obtained composites were investigated as electrode for electrochemical
supercapacitors and their electrochemical performances have been investigated. Microstructures
and surface morphologies, observed by scanning electron microscopy, appears crystalline with
spherically-shaped nm-sized particles. The aim of our work was study of structural and
electrochemical properties of ternary perovskite and LSCO/RuO2 as a supecapacitive material of
improved stability with respect to carbonaceous ones. Potentiostatic ac impedance analysis has
indicated lower charge transfer resistance of the LSCO/RuO2 sample confirming its enhanced
electrochemical performances. The measurements indicated that nanocomposite LSCO/RuO2 is more
suitable catalytic material with improved electrochemical performances.",
publisher = "Beograd: Udruženje inženjera Srbije za koroziju i zaštitu materijala (UISKOZAM), Beograd: Naučna ustanova za hemiju, tehnologiju i metalurgiju, Institut od nacionalnog značaja",
journal = "Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XX YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova/ Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XX YuCorr International Conference - proceedings [May 21-24, 2018, Tara Mountain, Serbia]",
title = "Improvement of the supercapacitor characteristics of perovskite oxides upon impregnation by RuO2",
pages = "136-141",
url = "https://hdl.handle.net/21.15107/rcub_cer_2651"
}

Eraković, S., Pavlović, M. M., Stopić, S., Stevanović, J., Panić, V.,& Friedrich, B.. (2018). Improvement of the supercapacitor characteristics of perovskite oxides upon impregnation by RuO2. in Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XX YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova/ Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XX YuCorr International Conference - proceedings [May 21-24, 2018, Tara Mountain, Serbia]
Beograd: Udruženje inženjera Srbije za koroziju i zaštitu materijala (UISKOZAM)., 136-141.
https://hdl.handle.net/21.15107/rcub_cer_2651

Eraković S, Pavlović MM, Stopić S, Stevanović J, Panić V, Friedrich B. Improvement of the supercapacitor characteristics of perovskite oxides upon impregnation by RuO2. in Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XX YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova/ Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XX YuCorr International Conference - proceedings [May 21-24, 2018, Tara Mountain, Serbia]. 2018;:136-141.
https://hdl.handle.net/21.15107/rcub_cer_2651 .

Eraković, Sanja, Pavlović, Miroslav M., Stopić, Srećko, Stevanović, Jasmina, Panić, Vladimir, Friedrich, Bernd, "Improvement of the supercapacitor characteristics of perovskite oxides upon impregnation by RuO2" in Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XX YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova/ Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XX YuCorr International Conference - proceedings [May 21-24, 2018, Tara Mountain, Serbia] (2018):136-141,
https://hdl.handle.net/21.15107/rcub_cer_2651 .

TY  - CONF
AU  - Pavlović, Miroslav
AU  - Eraković, Sanja
AU  - Panić, Vladimir
AU  - Pantović Pavlović, Marijana
AU  - Stopić, Srećko
AU  - Friedrich, Bernd
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6563
AB  - In this study, La0.6Sr0.4CoO3 (LSC) powder and LSC doped with 20 wt.% RuO2 were investigated as anode materials for supercapacitor. Spherical submicron particles of La0.6Sr0.4CoO3 have been synthesized by ultrasonic spray pyrolysis. Morphology of LSC powder was examined by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. Both powders were examined by X-ray diffraction, which indicated that substitution of Ru for Sr and Co in the base strongly increased the electrocatalytic activity of the oxide. Electrochemical characterization results have shown improvement in capacitive characteristics of doped LSC showing that this material is good prerequisite for supercapacitor.
PB  - Bor, Serbia : University of Belgrade, Technical Faculty in Bor
C3  - Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia
T1  - Electrochemical characterization of La0.6Sr0.4CoO3 and La0.6Sr0.4CoO3 doped with RuO2 powders as the next generation supercapacitors
SP  - 31
EP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_cer_6563
ER  - 

@conference{
author = "Pavlović, Miroslav and Eraković, Sanja and Panić, Vladimir and Pantović Pavlović, Marijana and Stopić, Srećko and Friedrich, Bernd",
year = "2017",
abstract = "In this study, La0.6Sr0.4CoO3 (LSC) powder and LSC doped with 20 wt.% RuO2 were investigated as anode materials for supercapacitor. Spherical submicron particles of La0.6Sr0.4CoO3 have been synthesized by ultrasonic spray pyrolysis. Morphology of LSC powder was examined by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. Both powders were examined by X-ray diffraction, which indicated that substitution of Ru for Sr and Co in the base strongly increased the electrocatalytic activity of the oxide. Electrochemical characterization results have shown improvement in capacitive characteristics of doped LSC showing that this material is good prerequisite for supercapacitor.",
publisher = "Bor, Serbia : University of Belgrade, Technical Faculty in Bor",
journal = "Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia",
title = "Electrochemical characterization of La0.6Sr0.4CoO3 and La0.6Sr0.4CoO3 doped with RuO2 powders as the next generation supercapacitors",
pages = "31-39",
url = "https://hdl.handle.net/21.15107/rcub_cer_6563"
}

Pavlović, M., Eraković, S., Panić, V., Pantović Pavlović, M., Stopić, S.,& Friedrich, B.. (2017). Electrochemical characterization of La0.6Sr0.4CoO3 and La0.6Sr0.4CoO3 doped with RuO2 powders as the next generation supercapacitors. in Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia
Bor, Serbia : University of Belgrade, Technical Faculty in Bor., 31-39.
https://hdl.handle.net/21.15107/rcub_cer_6563

Pavlović M, Eraković S, Panić V, Pantović Pavlović M, Stopić S, Friedrich B. Electrochemical characterization of La0.6Sr0.4CoO3 and La0.6Sr0.4CoO3 doped with RuO2 powders as the next generation supercapacitors. in Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia. 2017;:31-39.
https://hdl.handle.net/21.15107/rcub_cer_6563 .

Pavlović, Miroslav, Eraković, Sanja, Panić, Vladimir, Pantović Pavlović, Marijana, Stopić, Srećko, Friedrich, Bernd, "Electrochemical characterization of La0.6Sr0.4CoO3 and La0.6Sr0.4CoO3 doped with RuO2 powders as the next generation supercapacitors" in Proceedings - XXV International Conference "ECOLOGICAL TRUTH" Eco-Ist'17, June 12-15, Vrnjačka Banja, Serbia (2017):31-39,
https://hdl.handle.net/21.15107/rcub_cer_6563 .