Shape and Size-Tailored Pd Nanocrystals to Study the Structure Sensitivity of 2-Methyl-3-butyn-2-ol Hydrogenation: Effect of the Stabilizing Agent

被引：10
|
作者：
Kiwi-Minsker, Lioubov [1 ]
Crespo-Quesada, Micaela [1 ]
机构：
[1] Ecole Polytech Fed Lausanne, Grp Catalyt React Engn, CH-1015 Lausanne, Switzerland
来源：
TOPICS IN CATALYSIS | 2012年 / 55卷 / 7-10期
基金：
瑞士国家科学基金会;
关键词：
Palladium nanocrystals; Alkyne hydrogenation; Shape and size-controlled synthesis; Poly (vinyl pyrrolidone) (PVP); Di-2-ethylhexylsulfoccinate (AOT); Structure sensitivity; HETEROGENEOUS CATALYSIS; SELECTIVE HYDROGENATION; METAL NANOCRYSTALS; 1,3-BUTADIENE HYDROGENATION; UNSATURATED-HYDROCARBONS; PALLADIUM CATALYSTS; MODEL CATALYSTS; PARTICLE-SIZE; NANOPARTICLES; PLATINUM;
D O I：
10.1007/s11244-012-9815-1
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Uniform Pd nanocrystals of cubic, octahedral and cube-octahedral shapes were synthesized via a solution-phase method using two stabilizers: poly (vinyl pyrrolidone) (PVP) and di-2-ethylhexylsulfoccinate (AOT) and tested in the hydrogenation of 2-methyl-3-butyn-2-ol. The AOT-stabilized Pd nanocrystals were found to be an order of magnitude more active, but less selective than those stabilized by PVP. This could be attributed to a stronger interaction of PVP with surface Pd by adsorbed N-containing groups. The results obtained were rationalized applying a two-site Langmuir-Hinshelwood kinetic model that allowed predicting 3-4 nm cubic or octahedral nanocrystals stabilized by AOT as the optimum active phase ensuring the highest production rate of target MBE.
引用
收藏
页码：486 / 491
页数：6
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