Effect of strong metal-support interaction on the catalytic performance of Pd/TiO2 in the liquid-phase semi hydrogenation of phenylacetylene

被引：123

作者：

Weerachawanasak, Patcharaporn ^{[1
]}

Mekasuwandumrong, Okorn ^{[2
]}

Arai, Masahiko ^{[3
]}

Fujita, Shin-Ichiro ^{[3
]}

Praserthdam, Piyasan ^{[1
]}

Panpranot, Joongjai ^{[1
]}

机构：

[1] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand

[2] Silpakorn Univ, Fac Engn & Ind Technol, Dept Chem Engn, Nakhonpathom 730000, Peoples R China

[3] Hokkaido Univ, Grad Sch Engn, Div Chem Proc Engn, Sapporo, Hokkaido, Japan

来源：

JOURNAL OF CATALYSIS | 2009年 / 262卷 / 02期

关键词：

Pd/TiO2; Solvothermal synthesis; Liquid-phase semihydrogenation; Phenylacetylene; Strong metal-support interaction; TiO2 crystallite size; SELECTIVE HYDROGENATION; PALLADIUM NANOPARTICLES; THERMAL-DECOMPOSITION; TITANIUM-DIOXIDE; PHENYL ACETYLENE; SEMIHYDROGENATION; SIZE; SILICA;

D O I：

10.1016/j.jcat.2008.12.011

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Liquid-phase semihydrogenation of phenylacetylene under mild conditions has been investigated on a series of solvothermal-derived nano-TiO2 supported Pd catalysts with various TiO2 crystallite sizes in the range of 9-23 nm. As revealed by CO chemisorption and transmission electron microscopy, all the catalysts exhibited strong metal-support interaction (SMSI) when reduced at 500 degrees C. The catalysts with SMSI show remarkably high catalytic performance in terms of both hydrogenation activities (turnover frequencies (TOFs) 9.1-21.4 s(-1)) and moderate-high selectivities to styrene (86-90%) at complete conversion of phenylacetylene. Without SMSI effect (the catalysts reduced at 40 degrees C), styrene selectivity and catalytic activity depended largely on the Pd particle size in which small Pd particles (formed on small crystallite size TiO2 supports) exhibited lower phenylacetylene conversion and poor styrene selectivity. Moreover, the TOF values of the non-SMSI catalysts were similar to those reported in the literature for other supported Pd catalyst; in liquid-phase semi hydrogenation of phenylacetylene under mild conditions (TOFs 1.3-2.8 s(-1)). (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：199 / 205

页数：7

共 47 条

[21] Comparative study of size-quantized Pd-montmorillonite catalysts in liquid-phase semihydrogenations of alkynes [J].