氧化铈的氧化还原性能对VO_x/CeO_2催化剂催化氯苯氧化性能的影响  

Effect of CeO_2 Redox Behavior on the Catalytic Activity of a VO_x/CeO_2 Catalyst for Chlorobenzene Oxidation

作　　者：关业军[1] 李灿[1] 

机构地区：[1]中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁大连116023

出　　处：《催化学报》2007年第5期392-394,共3页

摘　　要：分别采用尿素、氨水和碳酸钠作沉淀剂制备了三种具有不同氧化还原性能的氧化铈载体,并考察了这三种氧化铈载体负载氧化钒催化剂催化氧化消除氯苯的性能.三种氧化钒催化剂在300℃下对氯苯氧化的转换频率依次为4.9,1.6和0.8h-1.该结果表明氧化铈载体的氧化还原性质影响着负载氧化钒催化剂催化氧化消除氯苯的活性,V-O-Ce键中的氧物种在该催化氧化反应中起着重要作用.Three CeO2 samples were prepared by precipitation with urea, ammonia, and sodium carbonate. Vanadium oxide was supported on these CeO2 materials, and their catalytic activity in the total oxidation of chlorobenzene was investigated. Their turnover frequencies for chlorobenzene oxidation are 4.9, 1.6, and 0.8 h^-1 at 300℃ , respectively, and depend on the redox properties of the CeO2 supports. These results demonstrate that the oxygen of the V-O-Ce bond plays an important role in determining the catalytic activity of the VOx/ CeO2 catalyst.

关 键 词：氧化铈 氧化钒 负载型催化剂 氧化还原性能 氯苯 催化氧化 

分 类 号：O643.36[理学—物理化学]