Abstract: The 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.
Keywords: ethanol steam reforming; hydrogen; gold; cerium-zirconium-cobalt mixed oxides
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Vargas, J.C.; Ivanova, S.; Thomas, S.; Roger, A.-C.; Pitchon, V. Influence of Gold on Ce-Zr-Co Fluorite-Type Mixed Oxide Catalysts for Ethanol Steam Reforming. Catalysts 2012, 2, 121-138.
Vargas JC, Ivanova S, Thomas S, Roger A-C, Pitchon V. Influence of Gold on Ce-Zr-Co Fluorite-Type Mixed Oxide Catalysts for Ethanol Steam Reforming. Catalysts. 2012; 2(1):121-138.
Vargas, Julio Cesar; Ivanova, Svetlana; Thomas, Sébastien; Roger, Anne-Cécile; Pitchon, Véronique. 2012. "Influence of Gold on Ce-Zr-Co Fluorite-Type Mixed Oxide Catalysts for Ethanol Steam Reforming." Catalysts 2, no. 1: 121-138.