A simple method for CO chemisorption studies under continuous flow: Adsorption and desorption behavior of Pt/Al2O3 catalysts

被引：45
作者：
Karakaya, Canan [1 ]
Deutschmann, Olaf [1 ,2 ]
机构：
[1] KIT, Inst Chem Technol & Polymer Chem, D-76131 Karlsruhe, Germany
[2] KIT, Inst Catalysis Res & Technol, D-76131 Karlsruhe, Germany
来源：
APPLIED CATALYSIS A-GENERAL | 2012年 / 445卷
关键词：
Metal dispersion; CO chemisorption; Pt/Al2O3; Adsorption; Desorption; TEMPERATURE-PROGRAMMED DESORPTION; SURFACE ELEMENTARY STEPS; GAS SHIFT REACTION; LIGHT-OFF TESTS; KINETIC-MODEL; OXIDATION; PLATINUM; ALUMINA; EUROPT-1; PT(111);
D O I：
10.1016/j.apcata.2012.08.022
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：
A simple and rapid method for the determination of metal dispersion of technical catalysts is presented, which is based on temperature-programmed desorption (TPD) of pre-adsorbed CO in a continuous-flow reactor at atmospheric conditions. A commercial Pt/Al2O3 diesel oxidation catalyst is studied as an example. In the TPD spectra, desorption of CO as well as CO2 is considered. Furthermore, a pulse adsorption technique is applied to better understand the adsorption-desorption behavior and the oxidation of CO. Metal dispersion based on the TPD methods presented agrees well with data derived from H-2 and CO chemisorption measurements using commercial set-ups. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：221 / 230
页数：10
相关论文
共 34 条
[1]   The surface heterogeneity of supported platinum catalysts as studied by the interrupted temperature-programmed desorption of carbon monoxide [J].
Arai, M ;
Fukushima, M ;
Nishiyama, Y .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1997, 70 (07) :1545-1549
[2]   Investigation of Pt/γ-Al2O3 catalysts with locally high Pt concentrations for oxidation of CO at low temperatures [J].
Arnby, K ;
Törncrona, A ;
Andersson, B ;
Skoglundh, M .
JOURNAL OF CATALYSIS, 2004, 221 (01) :252-261
[3]  
Bergeret G., 2008, Handbook of heterogeneous catalysis, P738, DOI DOI 10.1002/9783527610044.HETCAT0038
[4]  
Boll W., 2011, THESIS FAKULTAT CHEM
[5]   Loading and Aging Effects in Exhaust Gas After-Treatment Catalysts with Pt As Active Component [J].
Boll, Willi ;
Tischer, Steffen ;
Deutschmann, Olaf .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2010, 49 (21) :10303-10310
[6]  
BOND GC, 1985, APPL CATAL, V18, P221
[7]  
BOND GC, 1985, APPL CATAL, V18, P225
[8]   Oxidation of CO on a Pt/Al2O3 catalyst:: from the surface elementary steps to light-off tests -: V.: Experimental and kinetic model for light-off tests in excess of O2 [J].
Bourane, A ;
Bianchi, D .
JOURNAL OF CATALYSIS, 2004, 222 (02) :499-510
[9]   Oxidation of CO on a Pt/Al2O3 catalyst:: From the surface elementary steps to lighting-off tests -: III.: Experimental and kinetic model for lights-off tests in excess CO [J].
Bourane, A ;
Bianchi, D .
JOURNAL OF CATALYSIS, 2002, 209 (01) :126-134
[10]   Oxidation of CO on a Pt/Al2O3 catalyst:: From the surface elementary steps to light-off tests I.: Kinetic study of the oxidation of the linear CO species [J].
Bourane, A ;
Bianchi, D .
JOURNAL OF CATALYSIS, 2001, 202 (01) :34-44
1234