文献类型：期刊文献

英文题名：Ru/CeO2 Catalyst with Optimized CeO2 Support Morphology and Surface Facets for Propane Combustion

作者：Wang, Zheng[1];Huang, Zhenpeng[1];Brosnahan, John T.[2];Zhang, Sen[2];Guo, Yanglong[1];Guo, Yun[1];Wang, Li[1];Wang, Yunsong[1];Zhan, Wangcheng[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA

年份：2019

卷号：53

期号：9

起止页码：5349

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20192006930876);WOS:【SCI-EXPANDED(收录号:WOS:000467641800074)】；

基金：Z.W. and Z.H. appreciate the financial support from the National Key Research and Development Program of China (grant no. 2016YFC0204300), the National Natural Science Foundation of China (grant no. 21577034), and the Fundamental Research Funds for the Central Universities (grant no. 222201717003). Y.G. thanks the National Natural Science Foundation of China (grant no. 21571061).

语种：英文

外文关键词：Catalyst activity - Oxygen - Combustion - Oxygen vacancies - Interface states - Propane - Morphology - Volatile organic compounds

摘要：Tailoring the interfaces between active metal centers and supporting materials is an efficient strategy to obtain a superior catalyst for a certain reaction. Herein, an active interface between Ru and CeO2 was identified and constructed by adjusting the morphology of CeO2 support, such as rods (R), cubes (C), and octahedra (O), to optimize both the activity and the stability of Ru/CeO2 catalyst for propane combustion. We found that the morphology of CeO2 support does not significantly affect the chemical states of Ru species but controls the interaction between the Ru and CeO2, leading to the tuning of oxygen vacancy in the CeO2 surface around the Ru-CeO2 interface. The Ru/CeO2 catalyst possesses more oxygen vacancy when CeO2-R with predominantly exposed CeO2{110} surface facets is used, providing a higher ability to adsorb and activate oxygen and propane. As a result, the Ru/CeO2-R catalyst exhibits higher catalytic activity and stability for propane combustion compared with the Ru/CeO2-C and Ru/CeO2-O catalysts. This work highlights a new strategy for the design of efficient metal/CeO2 catalysts by engineering morphology and associated surface facet of CeO2 support for the elimination of light alkane pollutants and other volatile organic compounds.