On the stability of platinum-composite electrocatalysts prepared with different substrate materials
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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 stabilitySource:
Journal of Electrochemical Science and Engineering, 2016, 6, 1, 29-35Publisher:
- International Association of Physical Chemists (IAPC)
Funding / projects:
- Ministry of Education, Science and Technological development of the Republic of Serbia
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IHTMTY - JOUR AU - Košević, Milica AU - Šekularac, Gavrilo AU - Panić, Vladimir PY - 2016 UR - https://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", 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. in 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. in Journal of Electrochemical Science and Engineering. 2016;6(1):29-35. doi:10.5599/jese.269 .
Košević, Milica, Šekularac, Gavrilo, Panić, Vladimir, "On the stability of platinum-composite electrocatalysts prepared with different substrate materials" in Journal of Electrochemical Science and Engineering, 6, no. 1 (2016):29-35, https://doi.org/10.5599/jese.269 . .