助剂改性对贵金属催化剂CO选择氧化活性中心的影响  

Influences of Promoters on Active Centers over Noble Metal Catalysts for CO Selective Oxidation

作　　者：王芳[1] 吕功煊[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,兰州730000

出　　处：《化学进展》2010年第8期1538-1549,共12页Progress in Chemistry

基　　金：国家重点基础研究发展计划(973)项目(No.2007CB613305;2009CB22003)资助

摘　　要：本文综述了近年来关于助剂改性对贵金属催化剂活性中心的构建及其一氧化碳PROX反应催化性能影响的最新研究进展,详尽地比较了碱(土)金属、过渡金属以及稀土氧化物对Au催化剂和Pt催化剂的影响。此外,还对CO氧化反应的机理、负载型贵金属催化剂在不同反应过程和存储条件下的失活原因进行了讨论。最后,提出了一些尚未解决或者仍需进一步研究的问题,并展望了CO选择氧化催化剂的研究和发展方向。The current research progresses about influences of promoters on constructing active centers on noble metal catalysts and their catalytic performances for CO preferential oxidation（PROX） in H2-rich stream have been reviewed.Effects of alkali（alkaline earth） metals,transitional-metals and rare earth oxides on the catalytic performance of Au catalysts and Pt group catalysts for PROX reaction are compared in detail.In addition,the reaction mechanism for CO preferential oxidation,the reasons for deactivation of supported noble metal catalysts in different storage and reaction conditions have been summarized.Finally,some problems unsolved and need to be further studied are advanced.The prospects for development of catalysts for PROX reaction are also discussed.

关 键 词：贵金属 CO选择氧化 催化剂失活 反应机理 助剂 

分 类 号：O643.3[理学—物理化学] O614[理学—化学]