TY  - JOUR
AU  - Ciric-Marjanovic, Gordana
AU  - Mentus, Slavko
AU  - Pasti, Igor
AU  - Gavrilov, Nemanja
AU  - Krstić, Jugoslav
AU  - Travas-Sejdic, Jadranka
AU  - Strover, Lisa T.
AU  - Kopecka, Jitka
AU  - Moravkova, Zuzana
AU  - Trchova, Miroslava
AU  - Stejskal, Jaroslav
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1594
AB  - Polypyrrole nanotubes (PPy-NTs) were prepared by the oxidation of pyrrole with iron(III) chloride in the presence of a structure-guiding agent, methyl orange. Upon carbonization of the salt form of PPy-NTs, the conducting nitrogen-containing nanotubular carbonaceous material (C-PPy-NT) was obtained. The morphology, structure, and physicochemical properties of PPy-NTs in salt and base form as well as C-PPy-NTs were investigated by transmission electron microscopy, Fourier transform infrared and Raman spectroscopies, conductivity measurements, elemental microanalysis, inductively coupled plasma optical emission spectroscopy, X-ray photoelectron spectroscopy, and nitrogen physisorption. Results of the material characterization were linked to their electrochemical behavior. Specific capacitance of around 120 F g(-1) at low potential sweep rate of 5 mV s(-1) was observed for original PPy-NTs. However, when the potential sweep rate was increased to 100 mV s(-1), PPy-NT salt retained the value of specific capacitance, while the capacitance of PPy-NT base decreased by 70%. Upon carbonization of PPy-NT salt, the specific capacitance was doubled and capacitance fade measured in the interval 5-100 mV s(-1) was determined to be around 45%. It is proposed that the absolute value of specific capacitance is determined by specific surface area and surface functional groups, while the capacitance fade is determined by the conductivity of the electrode material. In this manner, a linear relationship between the percent of capacitance fade and the logarithm of the conductivity was revealed. C-PPy-NTs were also tested as an electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. High ORR activity was observed, characterized by the onset potential of -0.1 V versus saturated calomel electrode and the apparent number of electrons consumed per oxygen molecule higher than 3. Appreciable ORR activity can be linked with a high fraction of mesopores and the presence of surface functional groups, especially pyridinic and pyrrolic nitrogens, and also with a high degree of structural disorder.
PB  - American Chemical Society (ACS)
T2  - Journal of Physical Chemistry C
T1  - Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes
VL  - 118
IS  - 27
SP  - 14770
EP  - 14784
DO  - 10.1021/jp502862d
ER  - 

@article{
author = "Ciric-Marjanovic, Gordana and Mentus, Slavko and Pasti, Igor and Gavrilov, Nemanja and Krstić, Jugoslav and Travas-Sejdic, Jadranka and Strover, Lisa T. and Kopecka, Jitka and Moravkova, Zuzana and Trchova, Miroslava and Stejskal, Jaroslav",
year = "2014",
abstract = "Polypyrrole nanotubes (PPy-NTs) were prepared by the oxidation of pyrrole with iron(III) chloride in the presence of a structure-guiding agent, methyl orange. Upon carbonization of the salt form of PPy-NTs, the conducting nitrogen-containing nanotubular carbonaceous material (C-PPy-NT) was obtained. The morphology, structure, and physicochemical properties of PPy-NTs in salt and base form as well as C-PPy-NTs were investigated by transmission electron microscopy, Fourier transform infrared and Raman spectroscopies, conductivity measurements, elemental microanalysis, inductively coupled plasma optical emission spectroscopy, X-ray photoelectron spectroscopy, and nitrogen physisorption. Results of the material characterization were linked to their electrochemical behavior. Specific capacitance of around 120 F g(-1) at low potential sweep rate of 5 mV s(-1) was observed for original PPy-NTs. However, when the potential sweep rate was increased to 100 mV s(-1), PPy-NT salt retained the value of specific capacitance, while the capacitance of PPy-NT base decreased by 70%. Upon carbonization of PPy-NT salt, the specific capacitance was doubled and capacitance fade measured in the interval 5-100 mV s(-1) was determined to be around 45%. It is proposed that the absolute value of specific capacitance is determined by specific surface area and surface functional groups, while the capacitance fade is determined by the conductivity of the electrode material. In this manner, a linear relationship between the percent of capacitance fade and the logarithm of the conductivity was revealed. C-PPy-NTs were also tested as an electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. High ORR activity was observed, characterized by the onset potential of -0.1 V versus saturated calomel electrode and the apparent number of electrons consumed per oxygen molecule higher than 3. Appreciable ORR activity can be linked with a high fraction of mesopores and the presence of surface functional groups, especially pyridinic and pyrrolic nitrogens, and also with a high degree of structural disorder.",
publisher = "American Chemical Society (ACS)",
journal = "Journal of Physical Chemistry C",
title = "Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes",
volume = "118",
number = "27",
pages = "14770-14784",
doi = "10.1021/jp502862d"
}

Ciric-Marjanovic, G., Mentus, S., Pasti, I., Gavrilov, N., Krstić, J., Travas-Sejdic, J., Strover, L. T., Kopecka, J., Moravkova, Z., Trchova, M.,& Stejskal, J.. (2014). Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes. in Journal of Physical Chemistry C
American Chemical Society (ACS)., 118(27), 14770-14784.
https://doi.org/10.1021/jp502862d

Ciric-Marjanovic G, Mentus S, Pasti I, Gavrilov N, Krstić J, Travas-Sejdic J, Strover LT, Kopecka J, Moravkova Z, Trchova M, Stejskal J. Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes. in Journal of Physical Chemistry C. 2014;118(27):14770-14784.
doi:10.1021/jp502862d .

Ciric-Marjanovic, Gordana, Mentus, Slavko, Pasti, Igor, Gavrilov, Nemanja, Krstić, Jugoslav, Travas-Sejdic, Jadranka, Strover, Lisa T., Kopecka, Jitka, Moravkova, Zuzana, Trchova, Miroslava, Stejskal, Jaroslav, "Synthesis, Characterization, and Electrochemistry of Nanotubular Polypyrrole and Polypyrrole-Derived Carbon Nanotubes" in Journal of Physical Chemistry C, 118, no. 27 (2014):14770-14784,
https://doi.org/10.1021/jp502862d . .

TY  - JOUR
AU  - Vujković, Milica
AU  - Gavrilov, Nemanja
AU  - Pasti, Igor
AU  - Krstić, Jugoslav
AU  - Travas-Sejdic, Jadranka
AU  - Ciric-Marjanovic, Gordana
AU  - Mentus, Slavko
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1162
AB  - Carbonized nanostructured polyaniline (C.PANI) was hydrothermally treated in 1 mol dm(-3) KOH at 200 degrees C. The treatment caused significant reduction of micropore volume but negligible changes in mesoporous domain, as evidenced by nitrogen adsorption measurements, as well as significant increase of surface N/C and O/C ratios, as evidenced by XPS method. In comparison to the C.PANI precursor, the new material, denoted as C.PANI.HAT200, delivered twice as high gravimetric capacitances, amounting to 363, 220 and 432 F g(-1), in 6 mol dm(-3) KOH, 2 mol dm(-3) KNO3 and 1 mol dm(-3) H2SO4, respectively, when measured potentiodynamically at a scan rate of 5 mV s(-1). Moreover, its exceptionally high electrocatalytic activity towards the oxygen reduction reaction (ORR), almost one order of magnitude higher than that of C.PANI was evidenced in alkaline media, approaching closely a four-electron pathway. The onset potential for ORR matched the one of platinum-based electrocatalyst. Significant improvements of both capacitive and electrocatalytic properties of C.PANI.HAT200 were discussed in correlation to the modification of surface functional groups. These findings affirm the low temperature hydrothermal post-synthetic modification of N-doped nanocarbons as a route of production of advanced multifunctional carbon materials with exceptional characteristics.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Carbon
T1  - Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment
VL  - 64
SP  - 472
EP  - 486
DO  - 10.1016/j.carbon.2013.07.100
ER  - 

@article{
author = "Vujković, Milica and Gavrilov, Nemanja and Pasti, Igor and Krstić, Jugoslav and Travas-Sejdic, Jadranka and Ciric-Marjanovic, Gordana and Mentus, Slavko",
year = "2013",
abstract = "Carbonized nanostructured polyaniline (C.PANI) was hydrothermally treated in 1 mol dm(-3) KOH at 200 degrees C. The treatment caused significant reduction of micropore volume but negligible changes in mesoporous domain, as evidenced by nitrogen adsorption measurements, as well as significant increase of surface N/C and O/C ratios, as evidenced by XPS method. In comparison to the C.PANI precursor, the new material, denoted as C.PANI.HAT200, delivered twice as high gravimetric capacitances, amounting to 363, 220 and 432 F g(-1), in 6 mol dm(-3) KOH, 2 mol dm(-3) KNO3 and 1 mol dm(-3) H2SO4, respectively, when measured potentiodynamically at a scan rate of 5 mV s(-1). Moreover, its exceptionally high electrocatalytic activity towards the oxygen reduction reaction (ORR), almost one order of magnitude higher than that of C.PANI was evidenced in alkaline media, approaching closely a four-electron pathway. The onset potential for ORR matched the one of platinum-based electrocatalyst. Significant improvements of both capacitive and electrocatalytic properties of C.PANI.HAT200 were discussed in correlation to the modification of surface functional groups. These findings affirm the low temperature hydrothermal post-synthetic modification of N-doped nanocarbons as a route of production of advanced multifunctional carbon materials with exceptional characteristics.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Carbon",
title = "Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment",
volume = "64",
pages = "472-486",
doi = "10.1016/j.carbon.2013.07.100"
}

Vujković, M., Gavrilov, N., Pasti, I., Krstić, J., Travas-Sejdic, J., Ciric-Marjanovic, G.,& Mentus, S.. (2013). Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment. in Carbon
Oxford : Pergamon-Elsevier Science Ltd., 64, 472-486.
https://doi.org/10.1016/j.carbon.2013.07.100

Vujković M, Gavrilov N, Pasti I, Krstić J, Travas-Sejdic J, Ciric-Marjanovic G, Mentus S. Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment. in Carbon. 2013;64:472-486.
doi:10.1016/j.carbon.2013.07.100 .

Vujković, Milica, Gavrilov, Nemanja, Pasti, Igor, Krstić, Jugoslav, Travas-Sejdic, Jadranka, Ciric-Marjanovic, Gordana, Mentus, Slavko, "Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment" in Carbon, 64 (2013):472-486,
https://doi.org/10.1016/j.carbon.2013.07.100 . .

TY  - JOUR
AU  - Janošević, Aleksandra
AU  - Pasti, Igor
AU  - Gavrilov, Nemanja
AU  - Mentus, Slavko
AU  - Krstić, Jugoslav
AU  - Mitrić, Miodrag
AU  - Travas-Sejdic, Jadranka
AU  - Ciric-Marjanovic, Gordana
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1001
AB  - Microporous conducting nitrogen-containing nanostructured carbon with excellent catalytic activity for the electrochemical synthesis of hydrogen peroxide was synthesized by the carbonization of self-assembled polyaniline 3,5-dinitrosalicylate nanorods. Carbonization was carried out by means of gradual heating in a nitrogen atmosphere up to 800 degrees C. Carbonized polyaniline nanorods containing 9.8 wt.% of nitrogen had a conductivity of 0.35 S cm(-1). The electrical characteristics, morphology, textural parameters, elemental composition, molecular structure and crystallinity of novel carbonized nanostructured polyaniline were investigated by conductivity measurements, scanning and transmission electron microscopies, nitrogen adsorption-desorption measurements, elemental microanalysis, XPS, FTIR and Raman spectroscopies, and XRD, respectively. The electrocatalytic activity of carbonized polyaniline nanorods towards oxygen reduction in alkaline conditions has been studied by the voltammetry with the rotating disk electrode.
PB  - Elsevier
T2  - Microporous and Mesoporous Materials
T1  - Microporous conducting carbonized polyaniline nanorods: Synthesis, characterization and electrocatalytic properties
VL  - 152
SP  - 50
EP  - 57
DO  - 10.1016/j.micromeso.2011.12.002
ER  - 

@article{
author = "Janošević, Aleksandra and Pasti, Igor and Gavrilov, Nemanja and Mentus, Slavko and Krstić, Jugoslav and Mitrić, Miodrag and Travas-Sejdic, Jadranka and Ciric-Marjanovic, Gordana",
year = "2012",
abstract = "Microporous conducting nitrogen-containing nanostructured carbon with excellent catalytic activity for the electrochemical synthesis of hydrogen peroxide was synthesized by the carbonization of self-assembled polyaniline 3,5-dinitrosalicylate nanorods. Carbonization was carried out by means of gradual heating in a nitrogen atmosphere up to 800 degrees C. Carbonized polyaniline nanorods containing 9.8 wt.% of nitrogen had a conductivity of 0.35 S cm(-1). The electrical characteristics, morphology, textural parameters, elemental composition, molecular structure and crystallinity of novel carbonized nanostructured polyaniline were investigated by conductivity measurements, scanning and transmission electron microscopies, nitrogen adsorption-desorption measurements, elemental microanalysis, XPS, FTIR and Raman spectroscopies, and XRD, respectively. The electrocatalytic activity of carbonized polyaniline nanorods towards oxygen reduction in alkaline conditions has been studied by the voltammetry with the rotating disk electrode.",
publisher = "Elsevier",
journal = "Microporous and Mesoporous Materials",
title = "Microporous conducting carbonized polyaniline nanorods: Synthesis, characterization and electrocatalytic properties",
volume = "152",
pages = "50-57",
doi = "10.1016/j.micromeso.2011.12.002"
}

Janošević, A., Pasti, I., Gavrilov, N., Mentus, S., Krstić, J., Mitrić, M., Travas-Sejdic, J.,& Ciric-Marjanovic, G.. (2012). Microporous conducting carbonized polyaniline nanorods: Synthesis, characterization and electrocatalytic properties. in Microporous and Mesoporous Materials
Elsevier., 152, 50-57.
https://doi.org/10.1016/j.micromeso.2011.12.002

Janošević A, Pasti I, Gavrilov N, Mentus S, Krstić J, Mitrić M, Travas-Sejdic J, Ciric-Marjanovic G. Microporous conducting carbonized polyaniline nanorods: Synthesis, characterization and electrocatalytic properties. in Microporous and Mesoporous Materials. 2012;152:50-57.
doi:10.1016/j.micromeso.2011.12.002 .

Janošević, Aleksandra, Pasti, Igor, Gavrilov, Nemanja, Mentus, Slavko, Krstić, Jugoslav, Mitrić, Miodrag, Travas-Sejdic, Jadranka, Ciric-Marjanovic, Gordana, "Microporous conducting carbonized polyaniline nanorods: Synthesis, characterization and electrocatalytic properties" in Microporous and Mesoporous Materials, 152 (2012):50-57,
https://doi.org/10.1016/j.micromeso.2011.12.002 . .