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Title

Influence of Gold on Ce-Zr-Co Fluorite-Type Mixed Oxide Catalysts for Ethanol Steam Reforming

AuthorsVargas, Julio César; Ivanova, Svetlana ; Thomas, Sébastien; Roger, Anne-Cécile; Pitchon, Véronique
Issue Date3-Feb-2012
PublisherMultidisciplinary Digital Publishing Institute
CitationCatalysts 2 (1): 121-138 (2012)
AbstractThe effect of gold presence on carbon monoxide oxidation and ethanol steam reforming catalytic behavior of two Ce-Zr-Co mixed oxides catalysts with a constant Co charge and different Ce/Zr ratios was investigated. The Ce-Zr-Co mixed oxides were obtained by the pseudo sol-gel like method, based on metallic propionates polymerization and thermal decomposition, whereas the gold-supported Ce-Zr-Co mixed oxides catalysts were prepared using the direct anionic exchange. The catalysts were characterized using XRD, TPR, and EDXS-TEM. The presence of Au in doped Ce-Zr-Co oxide catalyst decreases the temperature necessary to reduce the cobalt and the cerium loaded in the catalyst and favors a different reaction pathway, improving the acetaldehyde route by ethanol dehydrogenation, instead of the ethylene route by ethanol dehydration or methane re-adsorption, thus increasing the catalytic activity and selectivity into hydrogen.
Publisher version (URL)http://doi.org/10.3390/catal2010121
URIhttp://hdl.handle.net/10261/151949
DOIhttp://dx.doi.org/10.3390/catal2010121
Identifiersdoi: 10.3390/catal2010121
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