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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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Enantio-differentiating hydrogenation of methyl acetoacetate over tartaric acid-modified nickel catalysts: effects of preparation method of supported nickel on activity and selectivity of catalysts

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Title
Enantio-differentiating hydrogenation of methyl acetoacetate over tartaric acid-modified nickel catalysts: effects of preparation method of supported nickel on activity and selectivity of catalysts
Other Titles
Enantio-differentiating hydrogenation of methyl acetoacetate over tartaric acid-modified nickel catalysts: effects of preparation method of supported nickel on activity and selectivity of catalysts
Author
Jo, DonghyunLee, Jae SungLee, Kyung Hee
Keywords
MODIFIED RANEY-NICKEL; ENANTIOSELECTIVE HYDROGENATION; DEPOSITION-PRECIPITATION; NI(II) PHASE; NI-SIO2 CATALYSTS; PROCHIRAL KETONES; SILICA CATALYST; PARTICLE-SIZE; REDUCTION; MECHANISM
Issue Date
2004-11
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, v.222, no.1-2, pp.199 - 205
Abstract
Enantio-differentiating hydrogenation of methyl acetoacetate was carried out over supported nickel catalysts modified by (R,R)-tartaric acid and NaBr. The types of support and the preparation methods affected the enantiomeric excess of the obtained product, methyl (R)-3-hydroxybutyrate. Nickel supported on aluminum oxide gave the best enantio-selectivity. Silica-supported catalysts showed lower selectivities. In particular, precipitation deposition of nickel on silica forms nickel silicate, which was difficult to be reduced and constituted a lattice defect of nickel surface. Even reduced nickel surface could be contaminated by silicon in nickel silicate. This defect and the surface contamination may disrupt the arranged adsorption of tartaric acid and reduce the enantio-selectivity of the catalysts. (C) 2004 Elsevier B.V. All rights reserved
URI
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DOI
10.1016/j.molcata.2004.08.001
ISSN
1381-1169
Appears in Collections:
ECHE_Journal Papers
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