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题名: Pt L-III-edge XANES and EXAFS studies on gamma-Al2O3 supported Pt catalysts
作者: Jia, JF;  Kou, Y;  Lin, LW;  Xu, ZS;  Zhang, T;  Niu, JZ;  Liang, DB
关键词: XANES ;  Pt ;  gamma-Al2O3
刊名: REACTION KINETICS AND CATALYSIS LETTERS
发表日期: 1998-03-01
卷: 63, 期:2, 页:391-396
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
英文摘要: Pt L-M-edge XANES and EXAFS were employed to investigate the nature of Pt/gamma-Al2O3, Pt-Sn/gamma-Al2O3 and Pt-Fe/gamma-Al2O3 catalysts. The results indicated that Pt species on these catalysts were all in the oxidized states before reduction, and in the metallic states after reduction. The dispersity of the Pt species on the catalysts was very high after reduction. The electronic properties of the highly dispersed Pt species were different from that of the bulk Pt in large crystallites. An interaction between Pt and the metal-oxide modified gamma-Al2O3 support is proposed. The interaction improved the dispersity of the Pt species on the catalysts and is thought to be the reason for the enhanced activity and selectivity for dehydrogenation reactions over these catalysts.
关键词[WOS]: ABSORPTION
语种: 英语
WOS记录号: WOS:000073219500028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138467
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China

Recommended Citation:
Jia, JF,Kou, Y,Lin, LW,et al. Pt L-III-edge XANES and EXAFS studies on gamma-Al2O3 supported Pt catalysts[J]. REACTION KINETICS AND CATALYSIS LETTERS,1998,63(2):391-396.
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