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

页码：486 / 491

页数：6