文献类型：期刊文献

英文题名：Catalytic performance of Co-Fe mixed oxide for NH3-SCR reaction and the promotional role of cobalt

作者：Shao, Changzhi;Liu, Xiaofei;Meng, Dongmei;Xu, Qian;Guo, Yanglong;Guo, Yun;Zhan, Wangcheng;Wang, Li;Lu, Guanzhong[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：6

期号：70

起止页码：66169

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20163002635386);WOS:【SCI-EXPANDED(收录号:WOS:000379577800103)】；

基金：This work was supported financially by the National Natural Science Foundation of China (21577034, 21333003, 91545103) and Fundamental Research Funds for the Central Universities (WJ1514020).

语种：英文

外文关键词：Temperature - Catalyst activity - Doping (additives) - Particle size - Hematite - Binary alloys - Cobalt compounds - Catalytic oxidation

摘要：Co-modified iron oxide (Co-FeOx) catalysts were prepared by a citric acid method for the low temperature NH3-SCR of NO in the presence of O-2. The results show that the amount of Co obviously influences the activity and stability of the Co-FeOx catalyst for the NH3-SCR reaction, and when the molar ratio of Co/Fe is 0.2 (Co-Fe-0.2), NO is completely converted at 170 degrees C and the operation temperature window reaches 210 degrees C. After eight reaction cycles, the NO conversion and operation temperature window are hardly changed, and the presence of Co can markedly increase both its SO2 and H2O resistance ability. It was found that doping Co into alpha-Fe2O3 results in the formation of CoFe2O4 crystals, and increases the relative content of Fe3+, surface oxygen amount and oxygen activity. The Co-Fe-0.2 catalyst has the smallest particle size and the largest surface area, and possesses higher reducibility and catalytic activity for NO oxidation to NO2 than alpha-Fe2O3, resulting in an improvement of the "fast-SCR reaction".