Structure-Dependent Selective Hydrogenation of α,β-Unsaturated Aldehydes over Platinum Nanocrystals Decorated with Nickel

被引：18
|
作者：
Jiang, Zhi [1 ,2 ]
Zhao, Yonghui [1 ]
Kong, Lingzhao [1 ]
Liu, Ziyu [1 ]
Zhu, Yan [1 ]
Sun, Yuhan [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Adv Res Inst, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai 201210, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHEMPLUSCHEM | 2014年 / 79卷 / 09期
基金：
中国国家自然科学基金;
关键词：
bimetallic catalysts; electronic structure; hydrogenation; nickel; platinum; UNSATURATED ALDEHYDES; CATALYSTS; CROTONALDEHYDE; NANOPARTICLES; SURFACE; ALLOY; CO; ADSORPTION; OXIDATION; ACROLEIN;
D O I：
10.1002/cplu.201402109
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The shape sensitivity of monometallic Pt and bimetallic Pt-Ni nanocrystals in alpha,beta-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 Pt-Ni cubic/octahedral shapes, Pt3Ni cubes enhanced the selective hydrogenation of the C=O double bond and suppressed the selective hydrogenation of the C=C double bond of the alpha,beta-unsaturated aldehyde. The Pt, Pt3Ni, or PtNi octahedral shape is an unfavorable structure for C=O 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 Pt-Ni nanocrystals play a key role in controlling the selective hydrogenation of C=C and C=O bonds of alpha,beta-unsaturated aldehydes.
引用
收藏
页码：1258 / 1262
页数：5
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