文献类型：期刊文献

英文题名：Titania-Samarium-Manganese Composite Oxide for the Low-Temperature Selective Catalytic Reduction of NO with NH3

作者：Xu, Qan[1,2];Fang, Zhilin[1,2];Chen, Yiyuan[1,2];Guo, Yanglong[1,2];Guo, Yun[1,2];Wang, Li[1,2];Wang, Yunsong[1,2];Zhang, Jinshui[3];Zhan, Wangcheng[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[3]Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350108, Peoples R China

年份：2020

卷号：54

期号：4

起止页码：2530

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20201008262668);WOS:【SCI-EXPANDED(收录号:WOS:000514759000049)】；

基金：Q.X. and W.Z. acknowledge financial support from the National Key Research and Development Program of China (2016YFC0204300), the National Natural Science Foundation of China (21922602, 21577034), the Science and Technology Commission of Shanghai Municipality (16ZR1407900), and the Shanghai Pujiang Program. Y.G. thanks the National Natural Science Foundation of China (21333003) and the Fundamental Research Funds for the Central Universities (222201717003). J.Z. thanks the National Natural Science Foundation of China (21972022).

语种：英文

外文关键词：Binary alloys - Ammonia - Nitrogen oxides - Titanium dioxide - Temperature - Manganese oxide - Samarium compounds - Catalyst selectivity - Reduction

摘要：A novel Ti-doped Sm-Mn mixed oxide (TiSmMnOx) was first designed for the selective catalytic reduction (SCR) of NOx with NH3 at a low temperature. The TiSmMnOx catalyst exhibited a superior catalytic performance, in which NOx, conversion higher than 80% and N-2 selectivity above 90% could be achieved in a wide-operating temperature window (60-225 degrees C). Specially, the catalyst also showed high durability against the large space velocity and excellent SO2/H2O resistance. Ti incorporation can efficiently inhibit MnOx crystallization and tune the MnOx phase during calcination at a high temperature. Subsequently, a high specific surface area as well as an increased amount of acid sites on the TiSmMnOx catalysts were produced. Further, the reducibility of the Sm-doped MnOx catalyst was modulated, facilitating NO oxidation and inhibiting NH3 nonselective oxidation. Consequently, a superior SCR activity was achieved at a low temperature and the operating temperature window of the TiSmMnOx catalyst was significantly widened. These findings may provide new insights into the reasonable design and development of the new non-vanadium catalysts with a high NH3-SCR activity for industrial application.