Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary estimation of the stability of composite electrocatalysts based on Pt. The changes in CV currents of platinum nanoparticles supported on TiO2 were compared to the changes of those supported on commercial carbon. TiO2 was synthesized by sol-gel method and Pt was deposited from Pt colloidal dispersion synthesized by microwave-assisted polyol process. It was found that Pt component in both Pt/TiO2 and Pt/C behaves similarly with respect to stability and activity during the cycling. The loss in activity with cycling was linear and strongly depended on sweep rate, i.e., the relative loss is higher at lower sweep rates. The steady state activities for both electrocatalysts were reached at the level of 65 % of initial activity and required more than 100 voltammetric cycles.
Keywords:
Catalytic activity / Metal colloids / Pt supported on TiO2 / Sweep rate dependent stability
Source:
Journal of Electrochemical Science and Engineering, 2016, 6, 1, 29-35
Publisher:
International Association of Physical Chemists (IAPC)
Projects:
Ministry of Education, Science and Technological development of the Republic of Serbia
TY - JOUR
AU - Košević, Milica
AU - Šekularac, Gavrilo
AU - Panić, Vladimir
PY - 2016
UR - http://cer.ihtm.bg.ac.rs/handle/123456789/3415
AB - Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary estimation of the stability of composite electrocatalysts based on Pt. The changes in CV currents of platinum nanoparticles supported on TiO2 were compared to the changes of those supported on commercial carbon. TiO2 was synthesized by sol-gel method and Pt was deposited from Pt colloidal dispersion synthesized by microwave-assisted polyol process. It was found that Pt component in both Pt/TiO2 and Pt/C behaves similarly with respect to stability and activity during the cycling. The loss in activity with cycling was linear and strongly depended on sweep rate, i.e., the relative loss is higher at lower sweep rates. The steady state activities for both electrocatalysts were reached at the level of 65 % of initial activity and required more than 100 voltammetric cycles.
PB - International Association of Physical Chemists (IAPC)
T2 - Journal of Electrochemical Science and Engineering
T1 - On the stability of platinum-composite electrocatalysts prepared with different substrate materials
VL - 6
IS - 1
SP - 29
EP - 35
DO - 10.5599/jese.269
ER -
@article{
author = "Košević, Milica and Šekularac, Gavrilo and Panić, Vladimir",
year = "2016",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/3415",
abstract = "Cyclic voltammetry (CV) measurements were conducted and analyzed for a preliminary estimation of the stability of composite electrocatalysts based on Pt. The changes in CV currents of platinum nanoparticles supported on TiO2 were compared to the changes of those supported on commercial carbon. TiO2 was synthesized by sol-gel method and Pt was deposited from Pt colloidal dispersion synthesized by microwave-assisted polyol process. It was found that Pt component in both Pt/TiO2 and Pt/C behaves similarly with respect to stability and activity during the cycling. The loss in activity with cycling was linear and strongly depended on sweep rate, i.e., the relative loss is higher at lower sweep rates. The steady state activities for both electrocatalysts were reached at the level of 65 % of initial activity and required more than 100 voltammetric cycles.",
publisher = "International Association of Physical Chemists (IAPC)",
journal = "Journal of Electrochemical Science and Engineering",
title = "On the stability of platinum-composite electrocatalysts prepared with different substrate materials",
volume = "6",
number = "1",
pages = "29-35",
doi = "10.5599/jese.269"
}
Košević, M., Šekularac, G.,& Panić, V. (2016). On the stability of platinum-composite electrocatalysts prepared with different substrate materials.
Journal of Electrochemical Science and Engineering
International Association of Physical Chemists (IAPC)., 6(1), 29-35.
https://doi.org/10.5599/jese.269
Košević M, Šekularac G, Panić V. On the stability of platinum-composite electrocatalysts prepared with different substrate materials. Journal of Electrochemical Science and Engineering. 2016;6(1):29-35
Košević Milica, Šekularac Gavrilo, Panić Vladimir, "On the stability of platinum-composite electrocatalysts prepared with different substrate materials" Journal of Electrochemical Science and Engineering, 6, no. 1 (2016):29-35,
https://doi.org/10.5599/jese.269 .
