Effects of synthesis methods on catalytic activities of CoOx–TiO2 for low-temperature NH3-SCR of NO

查看全文 作　　者：Li [1]Zhu;Yiqing [1]Zeng;Shule [1]Zhang;Jinli [1]Deng;Qin [1]Zhong

机构地区：[1]School of Chemical Engineering,Nanjing University of Science and Technology

出　　处：《Journal of Environmental Sciences》索引2017年第29卷第4期,共11页

基　　金：financially supported by the Key Project of Chinese National Programs for Research and Development(No.2016YFC0203800);the National Natural Science Foundation of China(Nos.51408309 and 51578288);the Science and Technology Support Program of Jiangsu Province(No.E2014713);the Natural Science Foundation of Jiangsu Province(No.BK20140777);the Industry-Academia Cooperation Innovation Fund Projects of Jiangsu Province(No.BY2014004-10);the Jiangsu Province Scientific and Technological Achievements into a Special Fund Project(No.BA2015062);the Top-notch Academic Programs of Jiangsu Higher Education Institutions 摘　　要：A series of cobalt doped TiO_2(Co-TiO_2) and Co Oxloaded TiO_2(Co/TiO_2) catalysts prepared by sol–gel and impregnation methods respectively were investigated on selective catalytic reduction with NH_3(NH_3-SCR) of NO. It was found that Co-TiO_2 catalyst showed more preferable catalytic activity at low temperature range. From characterization results of XRD,TEM, Raman and FT-IR, Co species were proved to be doped into TiO_2 lattice by replaced Ti atoms. After being characterized and analyzed by NH_3-TPD, PL, XPS, EPR and DRIFTS, it was found that the better NH_3-SCR activities of Co-TiO_2 catalysts, compared with Co/TiO_2 catalyst, were ascribed to the formation of more oxygen vacancies which further promoted the production of more superoxide ions(O-2). The superoxide ions were crucial for the formation of low temperature SCR reaction intermediates(NO-3) by reacting with adsorbed NO molecule. Therefore, these aspects were responsible for the higher low temperature NH_3-SCR activity of Co-TiO_2 catalysts. 关键词：催化活性二氧化钛 SCR 高低温 TIO2催化剂合成方法氧化钴选择性催化还原

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Effects of synthesis methods on catalytic activities of CoOx–TiO2 for low-temperature NH3-SCR of NO

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