文献类型：期刊文献

英文题名：Morphology effect of Ru/CeO2 catalysts for the catalytic combustion of chlorobenzene

作者：Huang, Hao[1];Dai, Qiguang[1];Wang, Xingyi[1]

机构：[1]E China Univ Sci & Technol, Res Inst Ind Catalysis, Adv Mat Lab, Shanghai 200237, Peoples R China

年份：2014

卷号：158

起止页码：96

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20141917697821);WOS:【SCI-EXPANDED(收录号:WOS:000339133500012)】；

基金：We would like to acknowledge the financial support from National Basic Research Program of China (No. 2010CB732300) and National Natural Science Foundation of China (No. 21307033, 21277047) and Shanghai Natural Science Foundation (No. 13ZR1411000), Young Teachers in Shanghai Universities, Commission of Science and Technology of Shanghai Municipality (No. 11JC1402900).

语种：英文

外文关键词：Ceria; Ruthenium; Chlorobenzene; Catalytic combustion; Crystal plane dependence

摘要：The present work elucidated the morphology and crystal-plane effects of nanoscale ceria on the activity of Ru/CeO2 catalysts toward catalytic combustion of chlorobenzene taken as a model of chlorinated aromatic hydrocarbons (CAHs). CeO2 nanorods (CeO2-r), nanocubes (CeO2-c) and nano-octahedra (CeO2-o) (enclosed by {110} and {100}, {100} and {111}, respectively) as supports, were prepared by wet impregnation. The status and structure of Ru species is quite dependent on the enclosed various facets. Ru/CeO2-r possesses much more Ru4+, oxygen vacancies and Ru-O-Ce bonds than Ru/CeO2-c and Ru/CeO2-o, indicating that there is a stronger interaction between Ru and CeO2-r. The surface oxygen mobility and reducibility follow the order of Ru/CeO2-r > Ru/CeO2-c > Ru/CeO2-o. The activity test of chlorobenzene oxidation shows that Ru/CeO2-r is more active than that of Ru/CeO2-c and Ru/CeO2-o, with T-10% and T-90% of 160 and 280 degrees C, respectively, which can be related to a larger number of Ru-O-Ce bonds, higher content of Ru4+ and surface oxygen mobility and reducibility. These results confirm that the activity of Ru/CeO2 catalysts for CB oxidation is greatly affected by CeO2 shape/crystal plane. (C) 2014 Published by Elsevier B.V.