Oxygen Reduction on Methanol-Tolerant Carbon-Supported PtxSy Nanoparticles Prepared by a Single-Step Low-Temperature Method

Carbonio, Emilia A.; Rodrigues-Filho, Ubirajara P.; Mesquita, Alexandre [UNESP]; Landers, Richard; Gonzalez, Ernesto R.

Oxygen Reduction on Methanol-Tolerant Carbon-Supported PtxSy Nanoparticles Prepared by a Single-Step Low-Temperature Method

Data

2019-09-01

Autores

Carbonio, Emilia A.

Rodrigues-Filho, Ubirajara P.

Mesquita, Alexandre

Landers, Richard

Gonzalez, Ernesto R.

Editor

Springer

Tipo

Artigo

Resumo

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.