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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
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  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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XAFS study of tin modification of supported palladium catalyst for 1,3-butadiene hydrogenation in the presence of 1-butene

Cited 34 times inthomson ciCited 35 times inthomson ci
Title
XAFS study of tin modification of supported palladium catalyst for 1,3-butadiene hydrogenation in the presence of 1-butene
Other Titles
XAFS study of tin modification of supported palladium catalyst for 1,3-butadiene hydrogenation in the presence of 1-butene
Author
Choi, Sun HeeLee, Jae Sung
Keywords
SURFACE ORGANOMETALLIC CHEMISTRY; X-RAY-ABSORPTION; CONTROLLED HYDROGENOLYSIS; BIMETALLIC CATALYSTS; FINE-STRUCTURE; METALS; SN(N-C4H9)(4)
Issue Date
2000-07
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF CATALYSIS, v.193, no.2, pp.176 - 185
Abstract
Alumina-supported palladium catalyst, which is active for the hydrogenation of 1,3-butadiene, was modified by tin using various tin precursors. The structure of modified catalysts was studied by XAFS and TPR. Before modification, palladium on alumina existed in an electron-deficient hydride state, which was revealed by a shift to a higher Pd K-edge energy in XANES and by an increased Pd-Pd distance in EXAFS fitting. However, tin modification caused the palladium edge energy to decrease to the value of zero valent palladium metal and destroyed the Pd ensembles by making Pd-Sn bonds, irrespective of the nature of tin precursor. This was responsible for the increased 1-butene selectivity in the hydrogenation of 1,3-butadiene in the presence of 1-butene. A carbonaceous species was formed in the catalyst modified with an organic tin precursor, while the inorganic tin modification produced a tin oxide-like species in addition to the formation of Sn-Pd bonds. (C) 2000 Academic Press
URI
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DOI
10.1006/jcat.2000.2893
ISSN
0021-9517
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ECHE_Journal Papers
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