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Synthesis of Co-Sn intermetallic nanocatalysts toward selective hydrogenation of citral
Zhou, Junyao1; Yang, Yusen1; Li, Changming2; Zhang, Shitong1; Chen, Yudi1; Shi, Shuxian1; Wei, Min1
2016
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
卷号4期号:33页码:12825-12832
摘要

In this work, three supported Co-Sn intermetallic compound (IMC) catalysts (Co2.9Sn2, CoSn and CoSn2) with a particle size of similar to 20 nm were prepared via a facile hydrotalcite approach, and their catalytic performances were evaluated in the selective hydrogenation of citral to unsaturated alcohols (geraniol and nerol). EXAFS, in situ CO-FTIR and DFT calculation results reveal that the introduction of Sn in Co-Sn IMCs dramatically optimizes the geometric and electronic structures of active Co, in which Sn isolates the Co active-site and electron transfer occurs from Sn to the Co atom. H-2-TPD measurements indicate the presence of four different Co sites (labeled as alpha, beta, gamma and sigma) on the surface of these IMCs; the sample of CoSn IMC shows the largest beta/(gamma + sigma) ratio, which results in the highest selectivity toward unsaturated alcohols (SUA: 67.6%). DFT studies prove that the geometric and electronic effects of the CoSn IMC weaken the hydrogenation of the C=C group, accounting for the largely enhanced hydrogenation selectivity of citral to unsaturated alcohols.

文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1039/c6ta04542a
收录类别SCI
语种英语
关键词[WOS]FISCHER-TROPSCH SYNTHESIS ; LIQUID-PHASE HYDROGENATION ; BETA-UNSATURATED ALDEHYDES ; CATALYTIC-PROPERTIES ; ALPHA,BETA-UNSATURATED ALDEHYDES ; CHEMOSELECTIVE HYDROGENATION ; CO/SIO2 CATALYSTS ; ACETYLENE ; SURFACE ; ADSORPTION
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
WOS类目Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
项目资助者973 Program(2014CB932104) ; National Natural Science Foundation of China ; Specialized Research Fund for the Doctoral Program of Higher Education(20130010110013)
WOS记录号WOS:000382015100016
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21313
专题多相复杂系统国家重点实验室
作者单位1.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714
Zhou, Junyao,Yang, Yusen,Li, Changming,et al. Synthesis of Co-Sn intermetallic nanocatalysts toward selective hydrogenation of citral[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(33):12825-12832.
APA Zhou, Junyao.,Yang, Yusen.,Li, Changming.,Zhang, Shitong.,Chen, Yudi.,...&Wei, Min.(2016).Synthesis of Co-Sn intermetallic nanocatalysts toward selective hydrogenation of citral.JOURNAL OF MATERIALS CHEMISTRY A,4(33),12825-12832.
MLA Zhou, Junyao,et al."Synthesis of Co-Sn intermetallic nanocatalysts toward selective hydrogenation of citral".JOURNAL OF MATERIALS CHEMISTRY A 4.33(2016):12825-12832.
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