摘要
采用共沉淀法和金属有机配合物固载法 ,分别制备了负载型金催化剂 ,并考察了焙烧条件对其催化 CO氧化性能的影响 .实验结果表明 ,焙烧温度和时间对催化剂的结构和活性的影响显著 ,不同的金属氧化物负载的金催化剂具有不同的最佳焙烧温度 .DTA- TG分析结果确定了催化剂稳定结构的形成温度 ;XRD测试结果显示 ,在最佳焙烧条件下得到的催化剂 ,其载体为具有一定结晶度的金属氧化物 .
Metal oxide supported gold catalysts were prepared by coprecipitation and organo gold complex grafting method, respectively. The effect of calcination conditions on catalytic performance for CO oxidation over these catalysts was investigated. It was found that calcination conditions have remarkable effects on the structure and activity of the catalysts and different metal oxide supports have different optimum calcination temperatures. DTA TG results are conducive to the determination of the temperature at which the catalysts form the suitable structure. XRD measurements of the catalysts show that the supports of the catalysts with high activity are in a state of poorly crystallized metal oxide.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2001年第4期246-250,共5页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金资助项目 ( 2 98730 41)
