摘要
应用ＸＲＤ、ＥＳＲ及ＸＰＳ方法研究了ＣｕＯ／ＣｅＯ２／γ－Ａｌ２Ｏ３催化剂的体相及表面结构，并对催化剂表面氧物种进行了表征．实验结果表明，ＣｅＯ２使Ｃｕ２＋还原为低价钢离子和增加钢化合物的分散性．催化剂中ＣｅＯ２含量高时，表面有Ｏ２－和Ｏ－物种，而ＣｅＯ２含量低时，只有Ｏ２－物种．
he structure of bulk phase and surface of CuO/CeO2/Y-Al2O3 was studied by XRD,ESR and XPS methods,and the surface oxygen was characterized by XPS. The results indicated that the presence of CeO2 made Cu2+ easily to be reduced to copper ion with lower valence, and increased the dispersion of copper oxides.O2-and O-coexisted on the surface of the catalyst with high CeO2 loading, but only O2-species existed on the surface of the catalyst with low Ceo2 loading.
基金
国家自然科学基金
关键词
氧化铜
氧化锗
催化剂
结构
氧物种
uo/Ceo2/γ-Al_2_O3catalyst,surface structure,bulk phase structure,surface oxygen species
