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N-doped graphene and TiO_2 supported manganese and cerium oxides on low-temperature selective catalytic reduction of NO_x with NH_3

查看全文 作　　者：Chunlin [1]ZHAO;Yanxia [1]WU;Hailong [1]LIANG;Xi [1]CHEN;Jie [1]TANG;Xianzhong [2,3]WANG 高影响力作者 机构地区：[1]Institute of Ceramic Science,China Building Material Academy;[2]Department of Materials Science and Engineering,Pingxiang College;[3]Jiangxi Province Building Materials Industry Catalyst and Carrier Engineering Technology Research Center高影响力机构 出　　处：《Journal of Advanced Ceramics》索引2018年第7卷第3期,共10页高影响力期刊 基　　金：financially supported by the Program of Frontier Exploration Fund of China Building Materials Academy,'the whole process of air pollution control on new technology research' (No. 2016YFC0209302) 摘　　要：A series of N-doped graphene(NG)and TiO_2 supported MnO_x–CeO_2 catalysts were prepared prepared by a hydrothermal method.The catalysts with different molar ratios of Mn/Ce(6:1,10:1,15:1)were investigated for the low-temperature selective catalytic reduction(SCR)of NO_x with NH_3.The synthesized catalysts were characterized by HRTEM,SEM,XRD,BET,XPS,and NH_3-TPD technologies.The characterization results indicated that manganese and cerium oxide particles dispersed on the surface of the TiO_2–NG support uniformly,and that manganese and cerium oxides existed in different valences on the surface of the TiO_2–NG support.At Mn element loading of 8 wt%,MnO_x–CeO_2(10:1)/TiO_2–1%NG displayed superior activity and improved SO_(2 )resistance.On the basis of the catalyst characterization,excellent catalytic performance and SO_2 tolerance at low temperature were attributed to the high content of manganese with high oxidation valence,extensive oxidation of NO into NO_2 by CeO_2 and strong NO adsorption capacity,and electron transfer of N-doped graphene. 关 键 词：LOW-TEMPERATURE selective catalytic reduction (SCR) N-DOPED GRAPHEME (NG) manganeseand CERIUM OXIDES
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