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 . .