文献类型：期刊文献

英文题名：Tuning the composition of metastable COxNiyMg100-x-y(OH)(OCH3) nanoplates for optimizing robust methane dry reforming catalyst

作者：Fan, Xiaoli[1];Liu, Zhiting[1];Zhu, Yi-An[1];Tong, Gangsheng[2];Zhang, Jingdong[3];Engelbrekt, Christian[3];Ulstrup, Jens[3];Zhu, Kake[1];Zhou, Xinggui[1]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, UNILAB, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Instrumental Anal Ctr, Shanghai 200240, Peoples R China;[3]Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark

年份：2015

卷号：330

起止页码：106

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20153001072232);WOS:【SCI-EXPANDED(收录号:WOS:000362603200010)】；

基金：KZ is grateful for financial support from the National Natural Science Foundation of China (21006024), the Fundamental Research Funds for the Central Universities (WA 1514011 and WB 1213004-1), and New Century Excellent Talents in University (NCET-11-0644). FP7 Staff-exchange (KZ) under the ELECTRONANOMAT program (Grant Agreement PIRSES-GA-2012-318990), sponsored by the Marie-Curie Act program of the EU, is acknowledged. XZ is grateful for financial support from the National Natural Science Foundation of China (91434117).

语种：英文

外文关键词：Methane; Carbon dioxide; Reforming; Reaction kinetics; Coke deposition; Cobalt; Nickel; Solvothermal synthesis

摘要：Finding controllable, low-cost, and scalable ways to generate Ni-based catalysts is the bottleneck for methane dry reforming catalyst design. A new method for generating trimetallic CoxNiyMg100-x-yO solid solution platelets enclosed by (111) facets has been developed from the topotactic pyrolysis of the metastable precursor CoxNiyMg100-x-y(OH)(OCH3) derived from solvothermal synthesis. The catalyst composition and reaction conditions have been modulated to achieve maximum coke resistance and catalyst stability. Long-term stability for 1000 h time on stream at 800 degrees C has been achieved for the optimized Co0.075Ni7.425Mg92.5O catalyst. The role of Co in the catalyst has been disclosed through kinetic measurements and detailed characterization of the spent catalysts. Co is enriched on the Co-Ni alloy surface under reforming conditions and accelerates the gasification of coke intermediates. Co also enhances the chemisorption of oxygen and reduces the activation energy for methane fragmentation, which is the rate-determining step for the overall reaction. (C) 2015 Elsevier Inc. All rights reserved.