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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
关键词Acetylene Hydrogenation Excess Ethylene Silver Pd Single-atom Ftir In Situ Xps Microcalorimetry
刊名ACS CATALYSIS
2015-06-01
DOI10.1021/acscatal.5b00700
5期:6页:3717-3725
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]TIO2 SUPPORTED PD ; BIMETALLIC CATALYSTS ; CO OXIDATION ; PD-AG/AL2O3 CATALYSTS ; STRUCTURE SENSITIVITY ; PALLADIUM CATALYSTS ; SURFACE-STRUCTURES ; SUBSURFACE CARBON ; PERFORMANCE ; NANOPARTICLES
英文摘要Semihydrogenation 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.
语种英语
WOS记录号WOS:000355964300059
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146307
专题中国科学院大连化学物理研究所
作者单位1.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
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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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