The effect of M/C (M = Mo, Cu, Fe and W) in the diffusion layer of gas diffusion electrodes on the hydrogen oxidation reaction in the presence of carbon monoxide

Química Nova

Ticianelli, Edson Antonio¹  Universidade de São Paulo, São Carlos, Brasil¹  Pereira, Luis Gustavo da Silva¹  Pereira, Maristela Elisabete¹ 

关键词: PEMFC;    carbon monoxide;    water-gas shift.;   

DOI  :  10.1590/S0100-40422007000700027

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The performance of proton exchange membrane fuel cells (PEMFC) with Pt-based anodes is drastically lowered when CO-containing hydrogen is used to feed the system, because of the strong adsorption of CO on platinum. In the present work the effects of the presence of a conversion layer of CO to CO2 composed by several M/C materials (where M = Mo, Cu, Fe and W) in gas diffusion anodes formed by Pt catalysts were investigated. The diffusion layers formed by Mo/C e W/C show good CO-tolerance, and this was attributed to the CO removal by parallel occurrence of the water-gas shift reaction and the so-called bifunctional mechanism.

【 授权许可】

Unknown