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用溶剂化金属原子浸渍法制备了不同金含量的高分散Au/TiO2 催化剂 .XRD和TEM测定结果表明 ,随着金含量的增加 ,金颗粒度增大 ,但直径都在 1 8～ 3 5nm范围内 .XPS研究表明金处于金属态 .Au/TiO2 在低温下就显示出较高的CO氧化活性 ,32 3K时CO的转化率可达到 10 0 % .金颗粒度为 1 8nm的Au/TiO2 催化剂活性最高
Highly dispersed Au / TiO2 catalysts with different gold content were prepared by solvated metal atom impregnation method.The results of XRD and TEM showed that the gold particle size increased with the increase of gold content, but the diameter was in the range of 18 ~ 35nm .XPS studies show that the gold is in the metal state.Au / TiO2 shows higher CO oxidation activity at low temperature, the conversion rate of CO can reach 100% at 32K.Au / TiO2 catalyst with a gold particle size of 18nm The highest activity