文献类型：期刊文献

英文题名：A highly effective Ni-modified MnOx catalyst for total oxidation of propane: the promotional role of nickel oxide

作者：Xie, Yujie[1];Guo, Yun[1];Guo, Yanglong[1];Wang, Li[1];Zhan, Wangcheng[1];Wang, Yunsong[1];Gong, Xueqing[1];Lu, Guanzhong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2016

卷号：6

期号：55

起止页码：50228

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20162402494044);WOS:【SCI-EXPANDED(收录号:WOS:000377577800109)】；

基金：This work was supported financially by the National High Technology Research and Development Program of China (2012AA111717), the Commission of Science and Technology of Shanghai Municipality (15DZ1205305) and Fundamental Research Funds for the Central Universities (WJ1514020).

语种：英文

外文关键词：Oxygen vacancies - Catalytic oxidation - Nickel oxide - Precipitation (chemical) - Propane - Binary alloys - Catalyst activity

摘要：Nickel promoted manganese oxide (MnNiOx) was prepared by the co-precipitation method and used as a catalyst for propane deep oxidation. The results show that the doping of Ni can effectively improve the catalytic performance of MnOx for propane total oxidation, and when Ni/Mn is 0.2, the MnNi0.2Ox catalyst exhibits the highest catalytic activity, for instance, the reaction temperature of 90% propane conversion (T-90) was only similar to 240 degrees C, and it demonstrates good thermal stability in the operation at temperatures alternating between 220 degrees C and 350 degrees C. It was found that an Mn-Ni-O solid solution can be formed by adding a moderate Ni amount into MnOx, resulting in changes in catalytically active sites by the synergetic interaction of Mn-Ni, such as a higher surface concentration of Mn4+ and oxygen vacancies, higher oxygen mobility and better reducibility. And the outstanding catalytic property of MnNi0.2Ox can be also related to its high surface area. Furthermore, the in situ DRIFT technique was used to investigate the reaction process of propane oxidation over the MnOx and MnNi0.2Ox catalysts, and the results suggest that the reaction mechanism is hardly changed after Ni doping in MnOx.