On the origin of the catalytic activity of gold nanoparticles for low-temperature CO oxidation
On the origin of the catalytic activity of gold nanoparticles for low-temperature CO oxidation
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DOI：
10.1016/j.jcat.2004.01.001
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发表时间：
2004-04-01
影响因子：
7.3
通讯作者：
Norskov, JK
中科院分区：
文献类型：
--
作者：
Lopez, N;Janssens, TVW;Norskov, JK
结果表明，负载型纳米金颗粒的特殊催化性能可能是由多种因素造成的，对其进行分层排序是有益的。最重要的影响与许多低配位金原子在小颗粒上的可用性有关。与支助机构相互作用有关的影响也可能起作用，但作用要小得多。我们的分析基于一组新的实验结果，比较了不同可还原性和不可还原性氧化物支撑的金的CO氧化速率，分析了大量已发表的活性数据，并分析了金属配位数对电荷转移、层厚度和与载体相互作用的影响的密度泛函计算。(C) 2004爱思唯尔公司版权所有。
It is Suggested that there may be several effects contributing to the special catalytic properties of supported nanosized gold particles, and that it is useful to order them in a hierarchy. The most important effect is related to the availability of many low-coordinated gold atoms on the small particles. Effects related to the interaction with the Support may also contribute, but to a considerably smaller extent. We base the analysis on a new set of experimental results comparing the CO oxidation rates over gold supported on different reducible and nonreducible oxides, on an analysis of a large number of published activity data, and on an analysis of density-functional calculations of the effect of metal coordination numbers in comparison to the role of charge transfer, layer thickness, and interactions with the support. (C) 2004 Elsevier Inc. All rights reserved.