Influence of the support in selective CO oxidation on Pt catalysts for fuel cell applications |
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Authors: | Mariana MVM Souza Nielson FP Ribeiro Martin Schmal |
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Affiliation: | 1. Escola de Química, Federal University of Rio de Janeiro, Centro de Tecnologia, Bloco E, sala 206, CEP 21940-900, Rio de Janeiro/RJ, Brazil;2. NUCAT/COPPE/UFRJ,Centro de Tecnologia, Bloco G, sala 228, CEP 21945-970, Rio de Janeiro/RJ, Brazil |
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Abstract: | One crucial requirement for the proton exchange membrane fuel cells (PEMFC) is to feed clean hydrogen to the anode, which is rapidly poisoned by traces of CO present from the upstream hydrocarbon reforming and water–gas shift processes. The removal of CO can be achieved by using catalysts able to selectively oxidize CO in the presence of excess hydrogen. Herein we report the effect of the support on Pt catalysts for total and selective oxidation (SELOX) of CO. The catalysts supported on ceria and zirconia presented higher activity than alumina and silica supported catalysts in SELOX reaction at low temperatures, but with lower CO conversions. |
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Keywords: | Selective oxidation Carbon monoxide Platinum Ceria Zirconia |
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