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Structure‐Dependent Selective Hydrogenation of α,β‐Unsaturated Aldehydes over Platinum Nanocrystals Decorated with Nickel
Author(s) -
Jiang Zhi,
Zhao Yonghui,
Kong Lingzhao,
Liu Ziyu,
Zhu Yan,
Sun Yuhan
Publication year - 2014
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402109
Subject(s) - bimetallic strip , platinum , octahedron , nanocrystal , nickel , aldehyde , molecule , catalysis , conjugated system , materials science , chemistry , inorganic chemistry , crystallography , photochemistry , crystal structure , organic chemistry , nanotechnology , polymer
The shape sensitivity of monometallic Pt and bimetallic PtNi nanocrystals in α,β‐unsaturated aldehydes is studied by using a cubic shape enclosed by six {100} facets as well as an octahedral shape surrounded by eight {111} facets. Compared with monometallic Pt and bimetallic PtNi cubic/octahedral shapes, Pt 3 Ni cubes enhanced the selective hydrogenation of the CO double bond and suppressed the selective hydrogenation of the CC double bond of the α,β‐unsaturated aldehyde. The Pt, Pt 3 Ni, or PtNi octahedral shape is an unfavorable structure for CO hydrogenation and enables the activation of the whole conjugated system of the molecule, which leads to complete hydrogenation to form the saturated alcohol product. The synergistic effects of the surface structure and electronic properties of Pt or PtNi nanocrystals play a key role in controlling the selective hydrogenation of CC and CO bonds of α,β‐unsaturated aldehydes.