Co_3O_4/CeO_2催化剂的TPR研究  

TPR Study of Co 3O 4/CeO 2 Catalyst

作　　者：边平凤[1] 钟依均[2] 周碧[2] 罗孟飞[2] 

机构地区：[1]浙江医科大学医化教研室 [2]杭州大学催化研究所

出　　处：《科技通报》1998年第2期94-97,共4页Bulletin of Science and Technology

基　　金：浙江省教委资助

摘　　要：用ＴＲＰ技术考察了不同负载量及不同焙烧温度的Ｃｏ３Ｏ４／ＣｅＯ２催化剂的还原性能和还原催化剂的再氧化性能．结果表明，Ｃｏ３Ｏ４／ＣｅＯ２催化剂有４个还原峰（α１、α２、γ１、γ２），α１、α２还原峰归属为分散在ＣｅＯ２表面与ＣｅＯ２发生相互作用的氧化钴的还原，γ１、γ２归属为晶相氧化钴的还原，随着焙烧温度升高，α１、α２峰消失．Ｃｏ３Ｏ４／ＣｅＯ２催化剂经还原后，α２物种最易氧化，其次是γ１物种，γ２物种最难被氧化．The reducibilities of Co 3O 4/CeO 2 catalysts with various loading and calcination temperature were investigated by means of TPR. The reoxidation properties of reduced Co 3O 4/CeO 2 catalyst were also studied. For oxided Co 3O 4/CeO 2 catalyst,four peaks (α 1,α 2,γ 1,γ 2) were found in the TPR patterns. α 1and α 2 were attributed to the reduction of finely dispersed Co ions which was interacting with CeO 2. α 1 and α 2 were attributed to reduction of the bulk cobalt oxide. α 1 and α 2 peak of Co 3O 4/CeO 2 disappeared with calcination temperature increased to 900℃. For reduced Co 3O 4/CeO 2 catalyst,oxidation of α 2 species was easier than that of γ 1 or γ 2 species.

关 键 词：催化剂 TPR 还原反应 氧化钴 氧化铈 

分 类 号：O643.36[理学—物理化学]