Catalytic performance of Au/ZnO nanocatalysts for CO oxidation
Catalytic performance of Au/ZnO nanocatalysts for CO oxidation
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DOI：
10.1016/j.jcat.2010.05.011
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发表时间：
2010-07-28
影响因子：
7.3
通讯作者：
Figueiredo, J. L.
中科院分区：
文献类型：
--
作者：
Carabineiro, S. A. C.;Machado, B. F.;Figueiredo, J. L.
负载Au（1%wt.）在三种不同的ZnO载体上，通过三种不同的方法：光沉积，双浸渍和超声处理。使用两种商业ZnO载体，沿着ZnO。样品由化学气相沉积法制备的纳米级单晶组成。这些样品通过各种技术进行了广泛的表征。CO氧化用作测试反应以比较催化活性。结果表明，超声法负载Au的化学气相沉积法制备的ZnO在室温下的催化活性为2 mol（co）g（Au）（-1）h（-1）。样品的高分辨率电子显微镜图像显示了ZnO棒上外延取向的一些金纳米晶体。独特的催化剂-底物相互作用可能与该样品的催化活性增加有关，这在任何其他样品中均未观察到。(C)2010年爱思唯尔公司All rights reserved.
Au was loaded (1% wt.) on three different ZnO supports, by three different methods: photodeposition, double impregnation and ultrasonication. Two commercial ZnO supports were used, along with a ZnO. sample consisting of nanosized single crystals prepared by chemical vapour deposition. The samples were extensively characterised by various techniques. CO oxidation was used as a test reaction to compare the catalytic activity. The best results were obtained with ZnO prepared by chemical vapour deposition with Au loaded by ultrasonication that showed an activity of 2 mol(co) g(Au)(-1) h(-1) at room temperature. High-resolution electron microscopy images of the sample showed a number of gold nanocrystals epitaxially oriented on the ZnO rod. The unique catalyst-substrate interaction can be related to the increased catalytic activity of this sample, which was not observed for any of the others. (C) 2010 Elsevier Inc. All rights reserved.