Influência de M/C (M = Mo, Cu, Fe e W) incorporado à camada difusora do eletrodo de difusão de gás frente à reação de oxidação de hidrogênio na presença de CO

Química Nova

Luis Gustavo Da Silva Pereira¹  Maristela Elisabete Pereira¹  Edson Antonio Ticianelli¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos Departamento de Físico-QuímicaSão Carlos SP ,Brasil

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

DOI  :  10.1590/S0100-40422007000700027

来源: SciELO

【 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】

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