Glaspell Garry, Fuoco Lindsay, El-Shall M Samy
Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 21284-2006, USA.
J Phys Chem B. 2005 Sep 22;109(37):17350-5. doi: 10.1021/jp0526849.
We report the microwave synthesis and characterization of Au and Pd nanoparticle catalysts supported on CeO2, CuO, and ZnO nanoparticles for CO oxidation. The results indicate that supported Au/CeO2 catalysts exhibit excellent activity for low-temperature CO oxidation. The Pd/CeO2 catalyst shows a uniform dispersion of Pd nanoparticles with a narrow size distribution within the ceria support. A remarkable enhancement of the catalytic activity is observed and directly correlated with the change in the morphology of the supported catalyst and the efficient dispersion of the active metal on the support achieved by using capping agents during the microwave synthesis. The significance of the current method lies mainly in its simplicity, flexibility, and the control of the different factors that determine the activity of the nanoparticle catalysts.
我们报道了负载在CeO2、CuO和ZnO纳米颗粒上用于CO氧化的Au和Pd纳米颗粒催化剂的微波合成及表征。结果表明，负载型Au/CeO2催化剂对低温CO氧化表现出优异的活性。Pd/CeO2催化剂显示出Pd纳米颗粒在二氧化铈载体中均匀分散且尺寸分布狭窄。观察到催化活性有显著提高，这与负载型催化剂形态的变化以及在微波合成过程中使用封端剂实现活性金属在载体上的有效分散直接相关。当前方法的重要性主要在于其简单性、灵活性以及对决定纳米颗粒催化剂活性的不同因素的控制。
