Heats of adsorption of linear CO species adsorbed on the Au○ and Ti+δ sites of a 1% Au/TiO2 catalyst using in situ FTIR Spectroscopy under adsorption equilibrium

被引:88
作者
Derrouiche, S [1 ]
Gravejat, P [1 ]
Bianchi, D [1 ]
机构
[1] Univ Lyon 1, LACE, UMR 5634, F-69622 Villeurbanne, France
关键词
D O I
10.1021/ja0470719
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The heats of adsorption of two linear CO species adsorbed on the Audegrees particles (denoted L-Audegrees) and on the Ti+delta sites (denoted LTi+delta) of a 1% Au/TiO2 catalyst are determined as the function of their respective coverage by using the AEIR procedure (adsorption equilibrium infrared spectroscopy) previously developed. Mainly, the evolutions of the IR band area of each adsorbed species (2184 cm(-1) for LTi+delta and at 2110 cm(-1) for L-Audegrees) as a function of the adsorption temperature T-a, at a constant CO adsorption pressure P-CO, provide the evolutions of the coverages theta(LTi+delta) and theta(LAudegrees). of each adsorbed CO species with T-a in isobar conditions that give the individual heats of adsorption. It is shown that they linearly vary from 74 to 47 kJ/mol for L-Audegrees and from 50 to 40 kJ/mol for LTi+delta at coverages 0 and 1, respectively. These values are consistent with literature data on model Au particles and TiO2. In particular, it is shown that the mathematical formalism supporting the AEIR procedure can be applied to literature data on Au-containing solids (single crystals and model particles).
引用
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页码:13010 / 13015
页数:6
相关论文
共 48 条
[1]  
BIANCHI D, 2002, CURR TOP CATAL, V3, P161
[2]   Au/TiO2 nanosized samples:: A catalytic, TEM, and FTIR study of the effect of calcination temperature on the CO oxidation [J].
Boccuzzi, F ;
Chiorino, A ;
Manzoli, M ;
Lu, P ;
Akita, T ;
Ichikawa, S ;
Haruta, M .
JOURNAL OF CATALYSIS, 2001, 202 (02) :256-267
[3]   FTIR study of the electronic effects of CO adsorbed on gold nanoparticles supported on titania [J].
Boccuzzi, F ;
Chiorino, A ;
Manzoli, M .
SURFACE SCIENCE, 2000, 454 (01) :942-946
[4]   THERMODYNAMIC AND VIBRATIONAL CHARACTERIZATION OF CO ADSORPTION ON VARIOUSLY PRETREATED ANATASE [J].
BOLIS, V ;
FUBINI, B ;
GARRONE, E ;
MORTERRA, C .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1989, 85 :1383-1395
[5]   Comparison of the coverage of the linear CO species on Pt/Al2O3 measured under adsorption equilibrium conditions by using FTIR and mass spectroscopy [J].
Bourane, A ;
Dulaurent, O ;
Bianchi, D .
JOURNAL OF CATALYSIS, 2000, 195 (02) :406-411
[6]   Heats of adsorption of the linear CO species adsorbed on a Ir/Al2O3 catalyst using in situ FTIR spectroscopy under adsorption equilibrium [J].
Bourane, A ;
Nawdali, M ;
Bianchi, D .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (10) :2665-2671
[7]   Heats of adsorption of the linear CO species on a Pt/Al2O3 catalyst using FTIR spectroscopy.: Comparison between TPD and adsorption equilibrium procedures [J].
Bourane, A ;
Dulaurent, O ;
Chandes, K ;
Bianchi, D .
APPLIED CATALYSIS A-GENERAL, 2001, 214 (02) :193-202
[8]   Heats of adsorption of linear and multibound adsorbed CO species on a Pt/Al2O3 catalyst using in Situ infrared spectroscopy under adsorption equilibrium [J].
Bourane, A ;
Dulaurent, O ;
Bianchi, D .
JOURNAL OF CATALYSIS, 2000, 196 (01) :115-125
[9]   CO adsorption on a Pd/TiO2(110) model catalyst [J].
Bowker, M ;
Stone, P ;
Bennett, R ;
Perkins, N .
SURFACE SCIENCE, 2002, 497 (1-3) :155-165
[10]   APPLICATIONS OF ADSORPTION MICROCALORIMETRY TO THE STUDY OF HETEROGENEOUS CATALYSIS [J].
CARDONAMARTINEZ, N ;
DUMESIC, JA .
ADVANCES IN CATALYSIS, 1992, 38 :149-244