2-21　ZrO₂-CeO₂担持Cu触媒を用いたエタノールのCO₂改質に及ぼすAuの添加効果

抄録

From our previous studies, we found that CuCeO₂ZrO₂ composite catalysts prepared by the sol-gel method showed good activity in the CO₂ reforming reaction of ethanol. In the present study, we aimed to further improve the activity by modifying CuCeO₂ZrO₂ composite catalysts with Au addition. AuCuCeO₂ZrO₂ composite catalyst improved the ethanol conversion, and the yields of H₂ and CO were maximized for the 2Au8Cu45Ce45Zr catalyst. TG-DTA measurements of the catalysts after the reaction suggested that Cu metal species of the active catalyst would be less susceptible to oxidation, facilitating the transfer of oxygen to the carbonaceous species to produce CO, which led to decrease in the coke formation for 2Au8Cu45Ce45Zr catalyst.