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|Title:||Oxygen reduction on methanol-tolerant carbon-supported PtxSy nanoparticles prepared by a single-step low-temperature method|
|Author:||Carbonio, Emilia A.|
Rodrigues-Filho, Ubirajara P.
Gonzalez, Ernesto R.
|Abstract:||In direct methanol fuel cells (DMFCs), the methanol crossover from the anode to the cathode is a major cause of power density loss because of the overpotential arising due to the parasitic reaction of methanol oxidation at the cathode. Catalysts modified with S have shown better methanol tolerance; however, the preparation routes often require high temperatures or pressures and very long times, making these expensive and unlikely to be used in large scale. Here, we report on a single-step low-temperature method used to prepare a carbon-supported PtxSy catalyst. Moreover, we show that the catalyst shows lower depolarization in the presence of methanol and study the effect of reductive thermal treatment and electrochemical potential cycling.|
|Subject:||Reação de redução de oxigênio|
Oxygen reduction reaction
|Appears in Collections:||IFGW - Artigos e Outros Documentos|
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