文献类型：期刊文献

英文题名：Understanding Co-Mo Catalyzed Ammonia Decomposition: Influence of Calcination Atmosphere and Identification of Active Phase

作者：Duan, Xuezhi[1];Ji, Jian[2];Yan, Xiaodong[1];Qian, Gang[1];Chen, De[3];Zhou, Xinggui[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2016

卷号：8

期号：5

起止页码：938

外文期刊名：CHEMCATCHEM

收录：;EI(收录号：20160601892230);WOS:【SCI-EXPANDED(收录号:WOS:000372152100011)】；

基金：This work is financially supported by the Natural Science Foundation of China (21306046 and 21506054), the Fundamental Research Funds for the Central Universities (WB1514056) and the 111 Project of Ministry of Education of China (B08021).

语种：英文

外文关键词：ammonia; cobalt; heterogeneous catalysis; molybdenum; nitrides

摘要：To elucidate the effect of textural and chemical properties of catalysts and to discriminate the active phase are fundamental issues in heterogeneous catalysis, but they are often complicated by the nature of support adding a new dimension. In this work, metal amine metallate (Co(en)(3)MoO4) precursor was directly treated by calcination and prenitridation to understand these two issues in Co-Mo catalyzed ammonia decomposition. The calcination atmosphere (i.e., Ar and Air) is found to remarkably affect the textural and chemical properties of catalysts, and air atmosphere is favorable for higher stable reactivity despite incomplete nitridation of the catalyst. Further prenitridation of the sample from the calcination of Co(en)(3)MoO4 under air gives rise to higher catalytic activity, and Co3Mo3N is suggested as the dominant active phase of Co-Mo catalysts. The insights revealed here shed new light on the design of Co-Mo catalysts for ammonia decomposition.