Facile Design of Highly Effective CuCexCo1-xOy Catalysts with Diverse Surface/Interface Structures toward NO Reduction by CO at Low Temperatures
发表时间：2019-11-01
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- 论文类型：
- 期刊论文
- 第一作者：
- Wang, Xinyang
- 通讯作者：
- Li, XY (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, State Key Lab Fine Chem, Key Lab Ind Ecol & Environm Engn,MOE, Dalian 116024, Peoples R China.; Zhang, DK (reprint author), Univ Western Australia, Ctr Energy M473, 35 Stirling Highway, Crawley, WA 6009, Australia.
- 合写作者：
- Zhang, Dongke,Li, Xinyong,Mu, Jincheng,Fan, Shiying,Wang, Liang,Gan, Guoqiang,Qin, Meichun,Li, Ji,Li, Zeyu
- 发表时间：
- 2019-08-28
- 发表刊物：
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- 收录刊物：
- SCIE
- 文献类型：
- J
- 卷号：
- 58
- 期号：
- 34
- 页面范围：
- 15459-15469
- ISSN号：
- 0888-5885
- 摘要：
- A series of highly effective CuCexCo1-xOy catalysts with diverse surface/interface structures were synthesized and applied to NO reduction by CO from 100 to 400 degrees C. The CuCe0.2Co0.8Oy catalyst exhibited superior catalytic performance, achieving 100% NO reduction at 175 degrees C. The structural and physicochemical properties and the intermediate species were systematically characterized. The results indicated that the surface dispersity of CuO species, the generation of low-oxidation-state metal species (Cu+ and Co2+) and surface oxygen vacancies (SOVs) were greatly enhanced due to stronger interaction between highly dispersed CuO species and supports, which favors for the enhancement of consequent redox properties and the regeneration of SOVs and low-oxidation-state metal ions during NO reduction by CO. The in situ FT-IR (Fourier transform infrared) results illustrated that the adsorption bands of CO2 and N2O on the CuCe0.2Co0.8Oy surface could emerge at lower temperatures, revealing that the CO adsorption/conversion and NO dissociation were significantly promoted by Ce modification.
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- 否
