DICP OpenIR
Effect of H-2 on adsorption and desorption behavior of CO over Rh-Mn-Li-Ti/SiO2 catalyst
Chen, WM; Ding, YJ; Wang, T; Jiang, DH; Li, XM; Luo, HY
关键词Infrared Spectroscopy Temperature-programmed Desorption Rhodium Manganese Lithium Titanium Silica Supported Catalyst Hydrogen Carbon Monoxide Adsorption Desorption
刊名CHINESE JOURNAL OF CATALYSIS
2005-12-01
26期:12页:1099-1103
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]SUPPORTED RHODIUM CATALYSTS ; CARBON-MONOXIDE ; HYDROGENATION ; RH/SIO2 ; INSITU ; RH
英文摘要The effect of H-2 on the adsorption and desorption behavior of CO on the Rh-Mn-Li-Ti/SiO2 catalyst was examined by IR spectroscopy and temperature-programmed desorption. The results indicated that the pre-adsorbed H-2 mainly occupied the adsorption sites for linearly adsorbed CO, and the part of subsequently adsorbed CO reacted with adsorbed hydrogen producing carbonyl hydrides. In the mixture of CO and hydrogen, carbonyl hydrides were also formed on Rh sites causing the red shift of the IR band of linearly adsorbed CO, and the high hydrogen concentration enhanced the CO adsorption. At 323 K, the IR band position and intensity of pre-adsorbed CO were not sensitive to the hydrogen. However, with increasing temperature, the presence of hydrogen promoted the desorption of weakly adsorbed CO, and its re-adsorption, as well as the dissociation of strongly adsorbed CO. In addition, the existence of hydrogen intensified the CO adsorption and influenced the structure of Rh giving rise to the increase in Rh dispersion and thereby the amount of CO adsorbed on Rh at 323 K.
语种英语
WOS记录号WOS:000234620700013
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139639
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
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GB/T 7714
Chen, WM,Ding, YJ,Wang, T,et al. Effect of H-2 on adsorption and desorption behavior of CO over Rh-Mn-Li-Ti/SiO2 catalyst[J]. CHINESE JOURNAL OF CATALYSIS,2005,26(12):1099-1103.
APA Chen, WM,Ding, YJ,Wang, T,Jiang, DH,Li, XM,&Luo, HY.(2005).Effect of H-2 on adsorption and desorption behavior of CO over Rh-Mn-Li-Ti/SiO2 catalyst.CHINESE JOURNAL OF CATALYSIS,26(12),1099-1103.
MLA Chen, WM,et al."Effect of H-2 on adsorption and desorption behavior of CO over Rh-Mn-Li-Ti/SiO2 catalyst".CHINESE JOURNAL OF CATALYSIS 26.12(2005):1099-1103.
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