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Metal Phosphides Derived from Hydrotalcite Precursors toward the Selective Hydrogenation of Phenylacetylene
Chen, Yudi1; Li, Changming2; Zhou, Junyao1; Zhang, Shitong1; Rao, Deming1; He, Shan1; Wei, Min1; Evans, David G.1; Duan, Xue1
2015-10-01
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume5Issue:10Pages:5756-5765
Abstract

We report a new synthetic strategy for the fabrication of several supported nickel phosphides (Ni12P5, Ni2P, and NiP2) with particle size ranging from 5 to 15 nm via a two-step procedure: preparation of supported Ni particles from layered double hydroxide precursors, followed by a further reaction with a certain amount of red phosphorus. The selective hydrogenation of phenylacetylene over these metal phosphides was evaluated, and the as-prepared Ni2P/Al2O3 catalyst shows a much higher selectivity to styrene (up to 88.2%) than Ni12P5/Al2O3 (48.0%), NiP2/Al2O3 (65.9%), and Ni/Al2O3 (0.7%) catalysts. EXAFS and in situ IR measurements reveal that the incorporation of P increases the bond length of Ni-Ni, which imposes a key influence on the adsorption state of alkene intermediates: as the Ni-Ni bond length extends to 0.264 nm, the alkene intermediate undergoes di-pi(C=C) adsorption, facilitating its desorption and the resulting enhanced selectivity. Moreover, electron transfer occurs from Ni to P, as confirmed by EXAFS, XPS, and in situ CO-IR experiment, in which the positively charged Ni reduces the desorption energy of alkene and thus improves the reaction selectivity.

KeywordMetal Phosphides Ldhs Selective Hydrogenation Exafs In Situ Ir
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1021/acscatal.5b01429
Indexed BySCI
Language英语
WOS KeywordLAYERED DOUBLE HYDROXIDES ; NICKEL PHOSPHIDE ; HYDROPROCESSING CATALYSTS ; ABSORPTION-SPECTROSCOPY ; INTERMETALLIC COMPOUNDS ; SUPPORTED CATALYSTS ; MODEL-COMPOUND ; NI ; NANOPARTICLES ; PERFORMANCE
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000362391500011
Citation statistics
Cited Times:50[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19618
Collection多相复杂系统国家重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
Chen, Yudi,Li, Changming,Zhou, Junyao,et al. Metal Phosphides Derived from Hydrotalcite Precursors toward the Selective Hydrogenation of Phenylacetylene[J]. ACS CATALYSIS,2015,5(10):5756-5765.
APA Chen, Yudi.,Li, Changming.,Zhou, Junyao.,Zhang, Shitong.,Rao, Deming.,...&Duan, Xue.(2015).Metal Phosphides Derived from Hydrotalcite Precursors toward the Selective Hydrogenation of Phenylacetylene.ACS CATALYSIS,5(10),5756-5765.
MLA Chen, Yudi,et al."Metal Phosphides Derived from Hydrotalcite Precursors toward the Selective Hydrogenation of Phenylacetylene".ACS CATALYSIS 5.10(2015):5756-5765.
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