文献类型：期刊文献

英文题名：Nanosheets-assembled Ni (Co) doped CeO2 microspheres toward NO plus CO reaction

作者：Du, Xuexun[1];Dai, Qiguang[1];Wei, Qinglian[1];Huang, Yongmin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China

年份：2020

卷号：602

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000554006800058)】；

基金：This research is based on work supported by the National Natural Science Foundation of China (NO. 21476071) and Research Centre of Analysis and Test of ECUST.

语种：英文

外文关键词：NO plus CO reaction; Nanosheets-assembled microspheres; CeO2-based composites; Reaction mechanism

摘要：Ni (Co) doped CeO2 were prepared via hydrothermal, sol-gel and solid state methods for NO+ CO reaction (CO + NO -> CO2 + N-2). The catalysts prepared by hydrothermal method (denoted as NiCe-HT and CoCe-HT) exhibited higher NO elimination efficiency than that by the other two methods due to their novel nanosheets-assembled microsphere structures and higher specific surface areas. Further characterization revealed that the better catalytic performance of NiCe-HT than CoCe-HT benefits from the easier reduction behavior, more oxygen vacancies and abundant surface chemical oxygen, leading to the NO complete elimination temperature of 175 degrees C and lifetime more than 40 h. In situ DRIFTS experiments indicated that the addition of Ni and Co into CeO2 can enhance NO and CO adsorption capacity, unstable intermediates were easier to be generated and converted on NiCe-HT than CoCe-HT. Finally, a possible mechanism for NO + CO reaction was proposed to understand the reaction processes.