文献类型：期刊文献

英文题名：CeO2 Wetting Layer on ZrO2 Particle with Sharp Solid Interface as Highly Active and Stable Catalyst for HCl Oxidation Reaction

作者：Sun, Yu[1,2];Cop, Pascal[2,3];Djerdj, Igor[4];Guo, Xiaohan[1];Weber, Tim[2,3];Khalid, Omeir[2,3];Guo, Yanglong[1];Smarsly, Bernd M.[2,3];Over, Herbert[2,3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Justus Liebig Univ, Inst Phys Chem, Heinrich Buff Ring 17, D-35392 Giessen, Germany;[3]Justus Liebig Univ, Zentrum Mat Forsch, Heinrich Buff Ring 16, D-35392 Giessen, Germany;[4]JJ Strossmayer Univ Osijek, Dept Chem, Ulica Cara Hadrijana 8-A, HR-31000 Osijek, Croatia

年份：2019

卷号：9

期号：12

起止页码：10680

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20194607676980);WOS:【SCI-EXPANDED(收录号:WOS:000502169900011)】；

基金：This work was supported by the National Key Research and Development Program of China (2016YFC0204300), National Natural Science Foundation of China (21577035), Commission of Science and Technology of Shanghai Municipality (13521103402, 15DZ1205305) and 111 Project (B08021). Yu Sun gratefully acknowledge the China Scholarship Council for the Joint-Ph.D program between the China Scholarship Council and the Physical Chemistry Institute of Justus-Liebig-University Giessen. We acknowledge support from the Laboratory of Materials Research at the JLU.

语种：英文

外文关键词：CeO2 supported on ZrO2; Deacon reaction; stability; activity; ultrathin layer

摘要：Dry impregnation of CeO2 on ZrO2 particles (CeO2@ZrO2) and calcination at 600 degrees C for 5 h result in a highly dispersed layer of the catalytically active CeO2 phase with an enriched concentration of Ce3+. The distinct morphology of CeO2@ZrO2 is responsible for the high (specific) activity in the gas-phase oxidation of HCl (Deacon reaction). Surprisingly, the CeO2@ZrO2 catalyst calcined at 600 degrees C is chemically even more stable toward chlorination under harsh Deacon condition than that calcined at 900 degrees C, where a solid solution of ZrO2 and CeO2 is formed at the solid interface. The improved stability of the CeO2 layer calcined at 600 degrees C is traced to its sharp interface formed with the ZrO2 support. We expect that this kind of active and stable layer morphology of CeO2 supported on ZrO2 is beneficial for other catalytic oxidation reactions as well, either as an active component or as a supporting material for another active metal component.