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Date of Publication:2013-01-01

Journal:分子催化

Volume:27

Issue:4

Page Number:316-322

ISSN No.:1001-3555

Abstract:Uniform Pd nanocrystals with cubic shapes were synthesized through a chemical reduction method.These nanoparticles were used as seeds to synthesis nanocubes with larger size and polyhedral nanocrystals with different proportions of{100 } to {111} facets on the surface.The selective hydrogenation of 1,4-butynediol was chosen as a model reaction,it was found that the catalytic properties of Pd nanoparticles are mainly determined by its size and shape.The hydrogenation of 1,4-butynediol on Pd { 111 } was faster than that on Pd { 100 }.All of the Pd nanocrystals stabilized by PVP showed higher selectivity to 1,4-butynediol,and the selectivity of 1,4-butynediol using Pd polyhedron with proper proportion of { 100 } and {111} facets as catalyst can received 96％.

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