Cooperative bimetallic catalyst for thio-etherification reaction prepared by crystal-facet engineering of γ-Al2O3 support
Cooperative bimetallic catalyst for thio-etherification reaction prepared by crystal-facet engineering of γ-Al2O3 support
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γ-Al2O3载体晶面工程制备硫醚化反应协同双金属催化剂
DOI:
10.1016/j.cattod.2020.06.062
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发表时间:
2020-06
期刊:
影响因子:
5.3
通讯作者:
Bao Xiaojun
中科院分区:
文献类型:
--
作者:
Wang Lei;Liu Haiyan;Fan Yu;Yuan Pei;Huang Deqi;Oyama S. Ted;Wang Tinghai;Bao Xiaojun
In alumina-based catalysts the properties of the alumina support directly influence the structure (size, morphology, orientation, etc.) of the resulting active phase and ultimately determine the performance of the final catalysts. This paper presents a facile and efficient method for γ-Al2O3to simultaneously expose {111} facets with strong acidity and {110} facets with moderate basicity. It is shown that the metal oxides NiOxand MoOxcan be selectively deposited and subsequently sulfided on the respective facets to form a NiS2-MoS2/Al2O3catalyst with substantially enhanced activity for thio-etherification reaction. By cooperative action of the active sites on the newly exposed facets, the catalyst is shown to have superior activity over a conventional NiMoS/Al2O3catalyst in the thio-etherification reaction between ethanethiol and isoamylene (2-methyl-2-butene) to yield ethylamyl thioethers. Our findings show that tuning the physicochemical properties via crystal facet engineering and inducing cooperative catalysis via preferential deposition of active metals open a novel avenue for the rational design and synthesis of high performance catalysts.
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影响因子:
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