期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 57, 期 46, 页码 15606-15612出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.8b03987
关键词
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资金
- National Key Research and Development Programme [2017YFA0206804]
- National Natural Science Foundation of China (NSFC)
- Fundamental Research Funds for the Central Universities [buctylkxj01]
Oxidant-free dehydrogenation of alcohols has attracted considerable attention, owing to the largely improved utility value of alcohols. Herein, mixed metal oxides (MMOs) via topological transformation of Mg-Al hydrotalcite precursors were prepared and used as support for the immobilization of metallic Ag nanoparticles. The resulting Ag/MgAl-MMO shows an excellent catalytic performance toward oxidant-free dehydrogenation of benzyl alcohol (conversion of benzyl alcohol: 95.9%; selectivity of benzaldehyde: 93.3%), which is close to platinum-group catalysts commonly used in this reaction. A combination study based on a series of characterization methods reveals a synergistic catalysis between Ag and medium-strong acid/basic sites (Mg delta+-O delta-) from support: Ag delta+ facilitates the breakage of alpha-C-H bond while Mg delta+-O delta- accelerates the cleavage of O-H bond. This work provides an effective approach to enhance catalytic behavior toward dehydrogenation reactions by virtue of metal-support interactions.
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