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Ag Alloyed Pd Single-Atom Catalysts for Efficient Selective Hydrogenation of Acetylene to Ethylene in Excess Ethylene
Pei, Guang Xian1,2; Liu, Xiao Yan1; Wang, Aiqin1; Lee, Adam F.3; Isaacs, Mark A.3; Li, Lin1; Pan, Xiaoli1; Yang, Xiaofeng1; Wang, Xiaodong1; Tai, Zhijun3; Wilson, Karen3; Zhang, Tao1
KeywordAcetylene Hydrogenation Excess Ethylene Silver Pd Single-atom Ftir In Situ Xps Microcalorimetry
Source PublicationACS CATALYSIS
2015-06-01
DOI10.1021/acscatal.5b00700
Volume5Issue:6Pages:3717-3725
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordTIO2 SUPPORTED PD ; BIMETALLIC CATALYSTS ; CO OXIDATION ; PD-AG/AL2O3 CATALYSTS ; STRUCTURE SENSITIVITY ; PALLADIUM CATALYSTS ; SURFACE-STRUCTURES ; SUBSURFACE CARBON ; PERFORMANCE ; NANOPARTICLES
AbstractSemihydrogenation of acetylene in an ethylene-rich stream is an industrially important process. Conventional supported monometallic Pd catalysts offer high acetylene conversion, but they suffer from very low selectivity to ethylene due to overhydrogenation and the formation of carbonaceous deposits. Herein, a series of Ag alloyed Pd single-atom catalysts, possessing only ppm levels of Pd, supported on silica gel were prepared by a simple incipient wetness coimpregnation method and applied to the selective hydrogenation of acetylene in an ethylene-rich stream under conditions close to the front-end employed by industry. High acetylene conversion and simultaneous selectivity to ethylene was attained over a wide temperature window, surpassing an analogous Au alloyed Pd single-atom system we previously reported. Restructuring of AgPd nanoparticles and electron transfer from Ag to Pd were evidenced by in situ FTIR and in situ XPS as a function of increasing reduction temperature. Microcalorimetry and XANES measurements support both geometric and electronic synergetic effects between the alloyed Pd and Ag. Kinetic studies provide valuable insight into the nature of the active sites within these AgPd/SiO2 catalysts, and hence, they provide evidence for the key factors underpinning the excellent performance of these bimetallic catalysts toward the selective hydrogenation of acetylene under ethylene-rich conditions while minimizing precious metal usage.
Language英语
WOS IDWOS:000355964300059
Citation statistics
Cited Times:162[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/146307
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, State Key Lab Catalysis, iChEM Collaborat Innovat Ctr Chem Energy Mat, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Aston Univ, European Bioenergy Res Inst, Birmingham B4 7ET, W Midlands, England
Recommended Citation
GB/T 7714
Pei, Guang Xian,Liu, Xiao Yan,Wang, Aiqin,et al. Ag Alloyed Pd Single-Atom Catalysts for Efficient Selective Hydrogenation of Acetylene to Ethylene in Excess Ethylene[J]. ACS CATALYSIS,2015,5(6):3717-3725.
APA Pei, Guang Xian.,Liu, Xiao Yan.,Wang, Aiqin.,Lee, Adam F..,Isaacs, Mark A..,...&Zhang, Tao.(2015).Ag Alloyed Pd Single-Atom Catalysts for Efficient Selective Hydrogenation of Acetylene to Ethylene in Excess Ethylene.ACS CATALYSIS,5(6),3717-3725.
MLA Pei, Guang Xian,et al."Ag Alloyed Pd Single-Atom Catalysts for Efficient Selective Hydrogenation of Acetylene to Ethylene in Excess Ethylene".ACS CATALYSIS 5.6(2015):3717-3725.
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