Supported Au catalysts for low temperature CO oxidation
Supported Au catalysts for low temperature CO oxidation
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DOI：
10.1016/s0021-9517(02)00111-2
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发表时间：
2003-05-15
影响因子：
7.3
通讯作者：
Costello, CK
中科院分区：
文献类型：
--
作者：
Kung, HH;Kung, MC;Costello, CK
负载型Au催化剂对低温CO氧化反应具有很高的活性。然而，不同实验室对于表面上相似的催化剂所报道的活性可能差别很大。最近的进展，在解决这个困难的总结。样品中残留的氯化物是活性中心的一种非常有效的毒物。水蒸气对催化活性的影响取决于载体和残余氯化物含量。活性位点的模型，它由金属An原子和An阳离子与羟基配体，CO氧化的反应机理，以及反应过程中的失活机制，以及再生方面的现有数据进行了讨论。(C)2003 Elsevier Science（美国）。All rights reserved.
Supported An catalysts are very active for low temperature CO oxidation. However, the reported activity from different laboratories for apparently similar catalysts can differ quite substantially. Recent progress in resolving this difficulty is summarized. Residual chloride in the sample is a very effective poison of the active site. The effect of water vapor on the catalytic activity differs depending on the support and the residual chloride content. A model of the active site, which consists of an ensemble of metallic An atoms and An cations with hydroxyl ligands, the reaction mechanism for CO oxidation, and the mechanism for deactivation during reaction as well as regeneration are discussed with respect to the available data. (C) 2003 Elsevier Science (USA). All rights reserved.