Dispersion measurement of platinum supported on Yttria-Stabilised Zirconia by pulse H2 chemisorption

被引:27
作者
Fortunato, M. Alves [1 ]
Aubert, D. [1 ]
Capdeillayre, C. [1 ]
Daniel, C. [2 ]
Hadjar, A. [2 ]
Princivalle, A. [1 ]
Guizard, C. [1 ]
Vernoux, P. [1 ,2 ]
机构
[1] CNRS St Gobain CREE, UMR3080, Lab Synth & Fonctionnalisat Ceram, F-84306 Cavaillon, France
[2] Univ Lyon 1, CNRS, UMR 5256, IRCELYON,Inst Rech Catalyse & Environm Lyon, F-69626 Villeurbanne, France
关键词
Hydrogen pulse chemisorption; Pt dispersion; Yttria-Stabilised Zirconia; Oxygen vacancies; Ionic conductor; ELECTROCHEMICAL PROMOTION; CATALYSTS; ADSORPTION; ION;
D O I
10.1016/j.apcata.2011.06.005
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
Platinum nanoparticles were dispersed by wet impregnation on YSZ (8 mol% Y2O3) an ionically conducting support. The Pt dispersion of a series of catalysts was determined by using H-2 pulse chemisorption. Temperature Programmed Reduction (TPR) experiments were performed to characterize the pre-reduction step before dispersion measurements. Finally, a fast and reliable procedure was defined for the Pt dispersion measurements consisting in a pre-reduction step in hydrogen at 500 degrees C before the H-2 pulse chemisorption performed at -28 degrees C. Reproducible Pt dispersion values were obtained in good agreement with those measured by pulse CO chemisorptions and static volumetric titration. In addition, the combination of Diffuse Reflectance Infrared Fourier Transform (DRIFT) spectroscopy and TPR has evidenced the role of surface oxygen vacancies on YSZ support for both H-2 and CO chemisorptions. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:18 / 24
页数:7
相关论文
共 21 条
[1]   Supported platinum catalysts for nitrogen oxide sensors [J].
Benard, S ;
Retailleau, L ;
Gaillard, F ;
Vernoux, P ;
Giroir-Fendler, A .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 55 (01) :11-21
[2]   Yttria-stabilized zirconia supported platinum catalysts (Pt/YSZs) for CH4/CO2 reforming [J].
Chen, YZ ;
Liaw, BJ ;
Kao, CF ;
Kuo, JC .
APPLIED CATALYSIS A-GENERAL, 2001, 217 (1-2) :23-31
[3]   Yttria-stabilized zirconia supported copper oxide catalyst .1. Effect of oxygen vacancy of support on copper oxide reduction [J].
Dow, WP ;
Wang, YP ;
Huang, TJ .
JOURNAL OF CATALYSIS, 1996, 160 (02) :155-170
[4]  
Ertl G., 2008, Handbook of Heterogeneous Catalysis, V1-5, P1
[5]  
ERTL G, 2008, HDB HETEROGENEOUS CA, V2, P738
[6]   CORRELATED INFRARED STUDIES OF PLATINUM SINGLE-CRYSTALS AND SUPPORTED CATALYSTS [J].
FOX, SG ;
BROWNE, VM ;
HOLLINS, P .
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1990, 54 :749-758
[7]   New catalytic concepts from new materials: understanding catalysis from a fundamental perspective, past, present, and future [J].
Haller, GL .
JOURNAL OF CATALYSIS, 2003, 216 (1-2) :12-22
[8]   TEMPERATURE-PROGRAMMED STUDIES OF THE ADSORPTION OF SYNTHESIS GAS ON ZIRCONIUM DIOXIDE [J].
HE, MY ;
EKERDT, JG .
JOURNAL OF CATALYSIS, 1984, 87 (01) :238-254
[9]   Comparative isotope-aided investigation of electrochemical promotion and metal-support interactions 1.: 18O2 TPD of electropromoted Pt films deposited on YSZ and of dispersed Pt/YSZ catalysts [J].
Katsaounis, A ;
Nikopoulou, Z ;
Verykios, XE ;
Vayenas, CG .
JOURNAL OF CATALYSIS, 2004, 222 (01) :192-206
[10]   Electrochemical infrared characterization of carbon-supported platinum nanoparticles: A benchmark structural comparison with single-crystal electrodes and high-nuclearity carbonyl clusters [J].
Park, S ;
Wasileski, SA ;
Weaver, MJ .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (40) :9719-9725