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Type: Artigo
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.
Mesquita, Alexandre
Landers, Richard
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
Country: Estados Unidos
Editor: Springer Nature
Rights: fechado
Identifier DOI: 10.1007/s12678-019-00522-9
Date Issue: 2019
Appears in Collections:IFGW - Artigos e Outros Documentos

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