文献类型：期刊文献

英文题名：The promoting effect of S-doping on the NH3-SCR performance of MnOx/TiO2 catalyst

作者：Liu, Xuesong[1,3];Yu, Qifan[1];Chen, Hongfeng[2];Jiang, Peng[1];Li, Jianfa[1];Shen, Zhongyun[2]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[2]Shaoxing Testing Inst Qual & Tech Supervis, Shaoxing 312000, Peoples R China;[3]China Bldg Mat Acad, State Key Lab Green Bldg Mat, Beijing 100024, Peoples R China

年份：2020

卷号：508

外文期刊名：APPLIED SURFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000516818700004)、、WOS

基金：The authors acknowledge financial support from the National Natural Science Foundation of China (No. 51702215), the Science and Technology Department of Zhejiang Province (LGG19B070002), the Science and Technology Program of Shaoxing (2017B70051), Shaoxing University (No. 2016LG1001), National Training Programs of Innovation and Entrepreneurship for Undergraduates (201810349011), Xinmiao Talent Program of Zhejiang Province (2018R432003) and the National Key R&D Program of China (No. 2017YFC0210700).

语种：英文

外文关键词：MnOx/TiO2 catalyst; S-doping; In-situ DRIFT; NH3-SCR

外文摘要：A series of S-doped MnOx/TiO2 catalysts were prepared by sol-gel method for the purpose of enhancing SCR performance. The obtained catalyst with mole ratio of S:Ti = 0.05:1 exhibited the best low temperature SCR performance and the widest active temperature window. According to the results of various analyses, the proper S was doped into TiO2 lattice via the replacement of Ti4+ by S4+ to generate Ti-O-S bond, along with increasing surface area, more surface Mn4+ species and more active oxygen species (O-2(-)). These enhanced properties improved the Bronsted acid sites and redox property of the properly S-doped MnOx/TiO2 catalyst. These advantages of S doping can essentially benefit the dc-NOx ability of MnOx/TiO2 catalysts. Meanwhile, the in situ DRIFT experiments revealed that the adsorbed NH4+ and gas-phase NO2 species were greatly increased after proper S-doping, along with the enhanced reactivity of the adsorbed NH3 and NOx species. Both E-R and L-H mechanisms occurred on the S-doped catalysts, while the promoting effect of S-doping was performed by facilitating the L-H route during SCR reaction.