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|Type:||Artigo de evento|
|Title:||Development Of New Systems Of Nano-disperse Pt-(2%pt-ce0.9w 0.1o2)/c Electrocatalysts Tolerant To Carbon Monoxide (co) For Pemfc Anodes|
|Abstract:||The nanophase material (powder) of Ce0.9W0.1O 2 was synthesized via coprecipitation of oxalates of cerium (IV) and tungsten cations. Pt-Ce0.9W0.1O2 (2 wt% Pt) was prepared by an alcohol-reduction process using H2PtCl 6.6H2O as source of Pt, Ce0.9W 0.1O2 as support and ethylene glycol as solvent and reducing agent. Pt-Ce0.9W0.1O2 was physically mixed with commercial Pt/C E-TEK (20 w% Pt) to produce the Pt-(2%Pt-Ce 0.9W0.1O2)/C electrocatalyst. The prepared electrocatalysts were characterized by energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and CO stripping. The performances of Pt/C E-TEK and Pt-(2%Pt-Ce0.9W0.1O2)/C electrocatalysts were tested in single fuel cell fed with a mixture H2/CO (100 ppm of CO). The results showed that the mixture of 2%Pt-Ce0.9W 0.1O2 and Pt/C E-TEK increases the CO tolerance in a single fuel cell operating at 85°C compared with Pt/C E-TEK. ©The Electrochemical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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