期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 58, 期 51, 页码 22702-22708出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b03315
关键词
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资金
- National Natural Science Foundation of China [21376019, 21676013]
- Beijing Engineering Center for Hierarchical Catalysts
The structure of the catalyst plays an important regulatory role in heterogeneous catalysis. Herein, we report the preparation of a novel NiRu bimetallic catalyst Ru/Ni/Ni(Al)O-x, confined by a weak crystalline Ni(Al)O-x matrix, by the reduction of an NiAIRu-layered double hydroxide (LDH) precursor in hydrogen atmosphere. Doping Ru3+ in LDH can facilitate the reduction of Ni2+ by hydrogen spillover and obviously decrease the size of Ni particles. The catalytic performance was evaluated by dimethyl terephthalate (DMT) hydrogenation to dimethyl cyclohexane-1,4-dicarboxylate (DMCD). The Ru/Ni/Ni(Al)O-x sample showed an enhanced catalytic activity with the conversion rate of DMT 99.3% and the selectivity of DMCD 93.2%. The reduction temperature can greatly affect the microstructure evolution and accordingly the catalytic performance. The synergistic effect of metal Ru and Ni is proposed to enhance the ability to activate H-2 and to adsorb DMT on the Ni(Al)O-x matrix.
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