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Structures and performance of Pd-Mo-K/Al2O3 catalysts used for mixed alcohol synthesis from synthesis gas
Li, ZR; Fu, YL; Jiang, M; Meng, M; Xie, YN; Hu, TD; Liu, T; Xie YN(谢亚宁); Hu TD(胡天斗); Liu T(刘涛)
2000
发表期刊CATALYSIS LETTERS
卷号65期号:1-3页码:43-48
通讯作者Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China ; Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China
文章类型Article
摘要The structures of the palladium-modified Mo-K/Al2O3 catalyst samples were characterized by the XRD, LRS, and EXAFS techniques and correlated to the catalytic properties of the samples for alcohol synthesis from synthesis gas. It is found that in the oxidic palladium-modified samples a strong interaction of the palladium modifier with the supported K-Mo-O species occurs. This interaction leads to a decrease in the size of the molybdenum species and stabilization of the cationic palladium species on the samples during sulfidation. Upon sulfidation, the sulfided molybdenum species in the palladium-free sample is mainly present as large patches of MoS2-like slabs with their basal sulfur planes interacting with the support surface. With the modification of palladium to the samples, the supported MoS2-like species becomes highly dispersed as revealed by the decrease in the average size of the sulfided molybdenum species. The interaction of the palladium species with the molybdenum component may cause the basal planes of the MoS2-like species to become oriented perpendicular to the support surface due to favorable bonding of the MoS2 edge planes to the support through Mo-O-Al bonds. In comparison with the sulfided Pd-free sample, the properties of the Pd-modified samples for alcohol synthesis from synthesis gas are much improved, which most probably results from the synergic interaction of the palladium with the molybdenum species that gives rise to the appearance of the active sites.
关键词sulfided Pd-Mo-K Al2O3 catalysts structure characterizations mixed alcohol synthesis
学科领域Chemistry
研究领域[WOS]Chemistry ; Chemistry
DOI10.1023/A:1019017321625
URL查看原文
语种英语
研究领域[WOS]Chemistry ; Chemistry
WOS类目Chemistry, Physical
WOS记录号WOS:000085878200007
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被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/236805
专题多学科研究中心
中国科学院高能物理研究所_中国散裂中子源
作者单位中国科学院高能物理研究所
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Li, ZR,Fu, YL,Jiang, M,et al. Structures and performance of Pd-Mo-K/Al2O3 catalysts used for mixed alcohol synthesis from synthesis gas[J]. CATALYSIS LETTERS,2000,65(1-3):43-48.
APA Li, ZR.,Fu, YL.,Jiang, M.,Meng, M.,Xie, YN.,...&刘涛.(2000).Structures and performance of Pd-Mo-K/Al2O3 catalysts used for mixed alcohol synthesis from synthesis gas.CATALYSIS LETTERS,65(1-3),43-48.
MLA Li, ZR,et al."Structures and performance of Pd-Mo-K/Al2O3 catalysts used for mixed alcohol synthesis from synthesis gas".CATALYSIS LETTERS 65.1-3(2000):43-48.
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