Cu、Mn复合氧化物及其负载Au催化剂的研究

Studies of Catalytic CuMnO_x and Its Supported Catalyst An for Oxidation of CO

摘要: 研究了Cu、Mn复合氧化物及其负载型An催化剂的物相结构、表面形貌、体相及表面的化学组成,考察了它们对CO氧化的催化活性及在200℃下进行氧化处理的效果.结果表明;Au和Ce加入Cu、Mn复合氧化物中,可提高其对CO氧化的催化活性;对催化剂进行氧化处理后,催化活性有所增加,表明对CO氧化的活性与晶格氧的数量有关;用浸渍法、涂层法所制备的催化剂其活性小于用共沉淀法制备的催化剂.

Abstract: The catalyst of CuMnO_x and its supported catalyst An used for oxidation of CO were studied. The catalytic activity and crystal oxygen and amount of catalytic oxygen was examined by XRD XPS and chemical analysis. The results showed that the activity of Au-Ce/CuMnO_x is higher than that of CuMnO_x which was catalysis of Au and of Ce. By treating CuMnO_x with oxygen at 200℃, the activity of CuMnO_x varied with the quantities of its crystal oxygen. The comparasion study shows that the catalytic activity of supported An by coprecipitation is higher than that by impregnation.