一氧化碳氧化的钯催化剂研究──Ⅱ．催化剂性能表征  

STUDY ON ALUMINA-SUPPORTED PALLADIUM CATALYSTS FOR CO OXIDATION──Ⅱ. CHARACTERIZATION OF Pd/α,δ-Al_2O_3 CATALYSTS

作　　者：戚建英[1] 杨启云[1] 李贤均[1] 

机构地区：[1]云南教育学院化学系,四川大学化学系

出　　处：《化学研究与应用》1996年第2期213-216,共4页Chemical Research and Application

摘　　要：分别用Ｘ－光电子能谱、Ｘ－射线衍射、氢氧滴定及红外光谱对催化剂Ｐｄ／α、δ－Ａｌ_２Ｏ_３进行了表征。结果表明：催化剂的活性组份Ｐｄ是以氧化钯ＰｄＯ和氯氧化钯Ｃｌ－Ｐｄ－Ｏ－Ａｌ－两种形式存在。当催化剂经８００℃高温焙烧后，绝大部分Ｃｌ－Ｐｄ－Ｏ－Ａｌ－转化为ＰｄＯ，高温促进ＰｄＯ烧结，活性中心减少，从而解释了催化剂Ｐｄ／α，δ－Ａｌ_２Ｏ_３经高温焙烧后活性降低的原因。Catalyst Pb/α,δ-Al_2O_3 has been characterized by XPS, XRD, IR and H_2-O_2 titrition. The Results indicated that there were two species, PdO and Cl-Pd-O-Al,on the alumina surface. After the catalyst was heated at 800℃,the majority of CL-Pd-O-Al was converted into PdO, while PdO was sintered and the numbers of active centers decreased. The activity of Pd/α,δ-Al_2O_3 was decreased after the catalyst was heated at 800℃,however the stability of the catalyst increased.

关 键 词：钯 催化剂 一氧化碳 催化活性 

分 类 号：O643.361[理学—物理化学] O613.71[理学—化学]