Determination of the dispersion of supported Pt particles by gas-phase and liquid-phase measurements

被引：12

作者：

Kivrak, Hilal ^{[1
]}

Mastalir, Agnes ^{[2
]}

Kiraly, Zoltan ^{[3
]}

Uner, Deniz ^{[1
]}

机构：

[1] Middle E Tech Univ, Dept Chem Engn, TR-06531 Ankara, Turkey

[2] Univ Szeged, Dept Organ Chem, H-6720 Szeged, Hungary

[3] Univ Szeged, Dept Colloid Chem, H-6720 Szeged, Hungary

来源：

CATALYSIS COMMUNICATIONS | 2009年 / 10卷 / 06期

基金：

匈牙利科学研究基金会;

关键词：

Microcalorimetry; Pt; CS2; poisoning; Styrene hydrogenation; SENSITIVE HYDROGEN ADSORPTION; PALLADIUM PARTICLES; ISOBUTANE DEHYDROGENATION; PT/SN CATALYSTS; SURFACE; PD; OXYGEN; SIZE; NANOPARTICLES; RUTHENIUM;

D O I：

10.1016/j.catcom.2008.12.049

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：

The dispersion of a Pt/gamma-Al2O3 catalyst was investigated by various experimental techniques. The values obtained by gas-phase hydrogen and carbon monoxide adsorption and transmission electron microscopy (TEM) were consistent for the metal:adsorbate stoichiometry of 1:1. However, these methods overestimated the number of active sites available for a liquid-phase reaction. For the hydrogenation of styrene in the presence Of CS2 as a catalyst poison, only the defect sites were found to be active in the catalytic reaction. The defect sites were related to the initial coverage dependent region of the adsorption heats measured by gas-phase microcalorimetry. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1002 / 1005

页数：4

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