XPS and DRIFTS operando studies of an inverse CeO2/CuO WGS catalyst: deactivating role of interfacial carbonates in redox activity

被引：30

作者：

Lopez Camara, Antonio ^{[1
]}

Monte, Manuel ^{[1
]}

Martinez-Arias, Arturo ^{[1
]}

Carlos Conesa, Jose ^{[1
]}

机构：

[1] CSIC, Inst Catalisis & Petroleoquim, Madrid 28049, Spain

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2012年 / 2卷 / 12期

关键词：

GAS-SHIFT REACTION; IN-SITU; INFRARED-SPECTROSCOPY; CO OXIDATION; WATER; CERIA; COPPER; ADSORPTION; H2O; H-2;

D O I：

10.1039/c2cy20399e

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：

An inverse CeO2/CuO catalyst has been examined by XPS and DRIFTS spectroscopies under reactant mixtures relevant to the low temperature WGS process. It is shown that the presence of H2O in the reactant mixture promotes catalyst reduction by facilitating the decomposition of interfacial carbonate species which hinder the redox processes leading to generation of the species catalytically active in WGS.

引用

页码：2436 / 2439

页数：4

共 25 条

[1] Unraveling the Active Site in Copper-Ceria Systems for the Water-Gas Shift Reaction: In Situ Characterization of an Inverse Powder CeO2-x/CuO-Cu Catalyst [J].

Barrio, Laura ;

Estrella, Michael ;

Zhou, Gong ;

Wen, Wen ;

Hanson, Jonathan C. ;

Hungria, Ana B. ;

Hornes, Aitor ;

Fernandez-Garcia, Marcos ;

Martinez-Arias, Arturo ;

Rodriguez, Jose A. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (08) :3580-3587

[2] Comparative in Situ DRIFTS-MS Study of 12CO- and 13CO-TPR on CuO/CeO2 Catalyst [J].

Bera, Parthasarathi ;

Lopez Camara, Antonio ;

Hornes, Aitor ;

Martinez-Arias, Arturo .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (24) :10689-10695

[3] IR study of polycrystalline ceria properties in oxidised and reduced states [J].

Binet, C ;

Daturi, M ;

Lavalley, JC .

CATALYSIS TODAY, 1999, 50 (02) :207-225

[4] H2O ADSORPTION ON CU2O(100) [J].

COX, DF ;

SCHULZ, KH .

SURFACE SCIENCE, 1991, 256 (1-2) :67-76

[5] On the issue of the deactivation of Au-ceria and Pt-ceria water-gas shift catalysts in practical fuel-cell applications [J].

Deng, WL ;

Flytzani-Stephanopoulos, M .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (14) :2285-2289

[6] Inner-shell photoelectron spectroscopy of size-selected Cu-clusters on Si [J].

Ferretti, N. ;

Balkaya, B. ;

Vollmer, A. ;

Neeb, M. ;

Eberhardt, W. .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 2007, 156 :124-127

[7] Structure-activity relationship in nanostructured copper-ceria-based preferential CO oxidation catalysts [J].

Gamarra, D. ;

Munuera, G. ;

Hungria, A. B. ;

Fernandez-Garcia, M. ;

Conesa, J. C. ;

Midgley, P. A. ;

Wang, X. Q. ;

Hanson, J. C. ;

Rodriguez, J. A. ;

Martinez-Arias, A. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (29) :11026-11038

[8] Operando DRIFTS and XANES Study of Deactivating Effect of CO2 on a Ce0.8Cu0.2O2 CO-PROX Catalyst [J].

Gamarra, Daniel ;

Fernandez-Garcia, Marcos ;

Belver, Carolina ;

Martinez-Arias, Arturo .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (43) :18576-18582

[9] Preferential oxidation of CO in rich H2 over CuO/CeO2: Operando-DRIFTS analysis of deactivating effect of CO2 and H2O [J].

Gamarra, Daniel ;

Martinez-Arias, Arturo .

JOURNAL OF CATALYSIS, 2009, 263 (01) :189-195

[10] Studies of the water-gas-shift reaction with ceria-supported precious metals [J].

Gorte, RJ ;

Zhao, S .

CATALYSIS TODAY, 2005, 104 (01) :18-24

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