文献类型：期刊文献

英文题名：Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

作者：Zhao, Dan[1];Wang, Chao[1];Yu, Feng[1];Shi, Yulin[1];Cao, Peng[1];Dan, Jianming[1];Chen, Kai[1,2];Lv, Yin[1];Guo, Xuhong[1,2];Dai, Bin[1]

机构：[1]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：8

期号：8

外文期刊名：NANOMATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000443257500059)】；

基金：This research was funded by the National High Technology Research and Development Program of China (863 program) (No. 2015AA03A401), the National Natural Science Foundation of China (No. 21476143, 21661027), and the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT_15R46).

语种：英文

外文关键词：layered double oxide; oxygen vacancies; selective catalytic reduction; low-temperature denitration; flash nanoprecipitation

摘要：A two-dimensional MnAl-layered double oxide (LDO) was obtained by flash nanoprecipitation method (FNP) and used for the selective catalytic reduction of NOx with NH3. The MnAl-LDO (FNP) catalyst formed a particle size of 114.9 nm. Further characterization exhibited rich oxygen vacancies and strong redox property to promote the catalytic activity at low temperature. The MnAl-LDO (FNP) catalyst performed excellent NO conversion above 80% at the temperature range of 100-400 degrees C, and N-2 selectivity above 90% below 200 degrees C, with a gas hourly space velocity (GHSV) of 60,000 h(-1), and a NO concentration of 500 ppm. The maximum NO conversion is 100% at 200 degrees C; when the temperature in 150-250 degrees C, the NO conversion can also reach 95%. The remarkable low-temperature catalytic performance of the MnAl-LDO (FNP) catalyst presented potential applications for controlling NO emissions on the account of the presentation of oxygen vacancies.