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中文摘要：
探讨负载型金属氧化物催化剂的表面组分与载体之间的相互作用,有助于理解相关催化剂的催化作用本质.近年来,我们对单组分CuO以及双组分CuO-Mn2O3,CuO-CoO等金属氧化物在γ-Al2O3载体表面的分散行为和存在状态,及其物理化学性质和催化性能(CO+O2和NO+CO模型反应)进行了研究.结果表明,这些金属氧化物在γ-Al2O3载体表面的分散行为和所得负载型催化剂样品的一些物理化学性质及其催化性能均可参照'嵌入模型'来解释.在此基础上,我们讨论了这些样品的'组成-结构-性质'间的关系,并针对表面负载双组分金属氧化物样品提出了表面协同氧空位参与的NO+CO反应机理.
英文摘要：
The investigation of the interaction between the surface dispersed components and the supports is the key to understand the nature of catalytic reactions.A single metal oxide(CuO) and dual metal oxides(CuO-Mn2 O3,CuO-CoO,etc.) were supported on γ-Al2 O3 to produce model catalysts.The dis- persion behavior of these metal oxides on the surface of γ-Al2 O3 and some physicochemical proper- ties were explained using the Incorporation Model.These properties were considered together with their catalytic performances in CO+O2 and NO+CO model reactions to explore 'composition- struc- ture-property' relationships.A possible reaction mechanism involving surface synergetic oxygen vacancy on the supported dual metal oxide catalysts was proposed to approach the nature of NO reduction by CO.
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