XAFS study of tin modification of supported palladium catalyst for 1,3-butadiene hydrogenation in the presence of 1-butene
SCIE
SCOPUS
- Title
- XAFS study of tin modification of supported palladium catalyst for 1,3-butadiene hydrogenation in the presence of 1-butene
- Authors
- Choi, SH; Lee, JS
- Date Issued
- 2000-07-25
- Publisher
- ACADEMIC PRESS INC
- 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.
- Keywords
- XAFS; 1,3-butadiene hydrogenation; Pd catalyst; tin modification; SURFACE ORGANOMETALLIC CHEMISTRY; X-RAY-ABSORPTION; CONTROLLED HYDROGENOLYSIS; BIMETALLIC CATALYSTS; FINE-STRUCTURE; METALS; SN(N-C4H9)(4)
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19909
- DOI
- 10.1006/jcat.2000.2893
- ISSN
- 0021-9517
- Article Type
- Article
- Citation
- JOURNAL OF CATALYSIS, vol. 193, no. 2, page. 176 - 185, 2000-07-25
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