Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 191, Issue 2, Pages 289-294Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1381-1169(02)00212-1
Keywords
hydrogenation; alkene; metal phosphate; palladium; platinum; selectivity
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Platinum(0) and palladium(0) catalysts have been prepared by first exchanging the acidic protons in a variety of metal(IV) phosphates with platinum or palladium ions followed by their reduction to metal. The resulting supported catalysts were examined for their effectiveness in the hydrogenation of 1-octene, 1-, 3-, 4-methylcyclohexenes and cyclododecene. Rates of reduction and stereoselectivity were compared with a standard commercial palladium-on-charcoal catalyst and were found to vary widely by a factor of about 500, depending on the support used. Data are reported as relative rates of reduction. Steric effects due to substrate/support interaction played a major role in selectivity to hydrogenation. (C) 2002 Elsevier Science.B.V. All rights reserved.
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