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Study on chemisorption of H-2, O-2, CO and C2H4 on Pt-Ag/SiO2 catalysts by microcalorimetry and FTIR
Li, L; Wang, X; Shen, J; Zhou, L; Zhang, T
关键词Chemisorption Differential Heat Microcalorimetry Pt-ag/sio2
刊名JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
2005
DOI10.1007/s10973-005-6852-z
82期:1页:103-107
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Analytical ; Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]ETHYLENE ADSORPTION ; HYDROCARBONS ; PT/SIO2
英文摘要Adsorption microcalorimetry has been employed to study the interaction of ethylene with the reduced and oxidized Pt-Ag/SiO2 Catalysts with different Ag contents to elucidate the modified effect of Ag towards the hydrocarbon processing on platinum catalysts. In addition, microcalorimetric adsorption of H-2, O-2, CO and FTIR of CO adsorption were conducted to investigate the influence of Ag on the surface structure of Pt catalyst. It is found from the microcalorimetric results of H-2 and O-2 adsorption that the addition of Ag to Pt/SiO2 leads to the enrichment of Ag on the catalyst surface which decreases the size of Pt surface ensembles of Pt-Ag/SiO2 catalysts. The microcalorimetry and FTIR of CO adsorption indicates that there still exist sites for linear and bridged CO adsorption on the surface of platinum catalysts simultaneously although Ag was incorporated into Pt/SiO2. The ethylene microcalorimetric results show that the decrease of ensemble size of Pt surface sites suppresses the formation of dissociative species (ethylidyne) upon the chemsorption of C2H4 on Pt-Ag/SiO2. The differential heat vs. uptake plots for C2H4 adsorption on the oxygen-preadsorbed Pt/SiO2 and Pt-Ag/SiO2 catalysts suggest that the incorporation of Ag to Pt/SiO2 could decrease the ability for the oxidation of C2H4.
语种英语
WOS记录号WOS:000233245600015
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139816
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Nanjing Univ, Dept Chem, Nanjing 210093, Peoples R China
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GB/T 7714
Li, L,Wang, X,Shen, J,et al. Study on chemisorption of H-2, O-2, CO and C2H4 on Pt-Ag/SiO2 catalysts by microcalorimetry and FTIR[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2005,82(1):103-107.
APA Li, L,Wang, X,Shen, J,Zhou, L,&Zhang, T.(2005).Study on chemisorption of H-2, O-2, CO and C2H4 on Pt-Ag/SiO2 catalysts by microcalorimetry and FTIR.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,82(1),103-107.
MLA Li, L,et al."Study on chemisorption of H-2, O-2, CO and C2H4 on Pt-Ag/SiO2 catalysts by microcalorimetry and FTIR".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 82.1(2005):103-107.
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