화학공학소재연구정보센터
Catalysis Letters, Vol.90, No.1-2, 1-6, 2003
The water-gas shift reaction over Au-based, bimetallic catalysts. The Au-M (M = Ag, Bi, Co, Cu, Mn, Ni, Pb, Ru, Sn, Tl) on iron(III) oxide system
The bimetallic Au-M/Fe2O3 catalysts were prepared by deposition coprecipitation method with Au/M atomic ratio of 1. All the catalysts were measured for WGS reaction and characterized by TPR/TPO studies. Ruthenium- and nickel-modified catalysts showed higher WGS activities compared to the other systems including unmodified Au/Fe2O3 at low temperature (100 degreesC). At higher temperature (240 degreesC), ruthenium-, nickel-, bismuth-, lead-, copper-, silver-, thallium- and tin-modified catalysts were more active than unmodified Au/Fe2O3.(.) Manganese- and cobalt-modified catalysts were less active than unmodified Au/Fe2O3. TPR analyses indicated a shift in reduction temperature in the bimetallic catalysts, suggesting a degree of interaction between gold and the second metal.