The effect of CeO2 on the surface and catalytic properties of Pt/CeO2-ZrO2 catalysts for methane dry reforming

被引：215

作者：

Damyanova, S. ^{[1
]}

Pawelec, B. ^{[2
]}

Arishtirova, K. ^{[1
]}

Martinez Huerta, M. V. ^{[2
]}

Fierro, J. L. G. ^{[2
]}

机构：

[1] Bulgarian Acad Sci, Inst Catalysis, BU-1113 Sofia, Bulgaria

[2] CSIC, Inst Catalisis & Petr Quim, Madrid 28049, Spain

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2009年 / 89卷 / 1-2期

关键词：

Dry reforming; Methane; Pt catalysts; Zirconia; Ceria-zirconia substrates; WATER-GAS SHIFT; CARBON-DIOXIDE; MIXED OXIDES; CO2; ZIRCONIA; REDUCTION; CERIA; PERFORMANCE; PLATINUM; SPECTRUM;

D O I：

10.1016/j.apcatb.2008.11.035

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 CO2 reforming of CH4 over Pt catalysts supported on nanocrystalline mesoporous ZrO2 and CeO2-ZrO2 carriers was investigated at atmospheric pressure. The effect of CeO2 content (1-12 wt%) on the surface and catalytic properties of the catalysts was studied. It was found that the pre-treatment temperature and the concentration of CeO2 influence on the morphology of Pt particles. The calcination temperature as high as 1073 K leads to sintering of Pt particles deposited over zirconia- and CeO2-loaded zirconia substrates. Temperature-programmed reduction (TPR) results showed good reductive properties for Pt/CeO2-ZrO2 catalysts due to both, the high surface shell reduction of zirconia and the synergetic effect between Pt and CeO2. X-ray photoelectron spectroscopy (XPS) of reduced catalysts revealed the presence of different Pt oxidation state depending on the catalyst composition. Stabilization of partially oxidized platinum species by ceria was detected for the reduced Pt/CeO2-ZrO2 samples. An activation period was required for the stabilization of the activity of Pt/CeO2-ZrO2 catalysts. The high stability of Pt/CeO2-ZrO2 catalysts was related to the close contact between Pt and CeO2. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：149 / 159

页数：11

共 56 条

[1] THE KINETICS OF CARBON FORMATION FROM CH4 + H2 ON A SILICA-SUPPORTED NICKEL-CATALYST [J].

ALSTRUP, I ;

TAVARES, MT .

JOURNAL OF CATALYSIS, 1992, 135 (01) :147-155

[2]

ANEGGI E, 2006, J ALLOYS COMPD, V408

[3]

[Anonymous], PRACTICAL SURFACE AN

[4] Ionic dispersion of Pt and Pd on CeO2 by combustion method:: Effect of metal-ceria interaction on catalytic activities for NO reduction and CO and hydrocarbon oxidation [J].

Bera, P ;

Patil, KC ;

Jayaram, V ;

Subbanna, GN ;

Hegde, MS .

JOURNAL OF CATALYSIS, 2000, 196 (02) :293-301

[5] Chemical and microstructural investigation of Pt/CeO2 catalysts reduced at temperatures ranging from 473 to 973 K. [J].

Bernal, S ;

Cauqui, MA ;

Cifredo, GA ;

Gatica, JM ;

Larese, C ;

Omil, JAP .

CATALYSIS TODAY, 1996, 29 (1-4) :77-81

[6] The state of zirconia supported platinum catalysts for CO2/CH4 reforming [J].

Bitter, JH ;

Seshan, K ;

Lercher, JA .

JOURNAL OF CATALYSIS, 1997, 171 (01) :279-286

[7] CO2 reforming of CH4 [J].

Bradford, MCJ ;

Vannice, MA .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1999, 41 (01) :1-42

[8] SATELLITE STRUCTURE IN X-RAY PHOTOELECTRON-SPECTRA OF SOME BINARY AND MIXED OXIDES OF LANTHANUM AND CERIUM [J].

BURROUGHS, P ;

HAMNETT, A ;

ORCHARD, AF ;

THORNTON, G .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1976, (17) :1686-1698

[9] Effect of CeO2 loading on the surface and catalytic behaviors of CeO2-Al2O3-supported Pt catalysts [J].

Damyanova, S ;

Bueno, JMC .

APPLIED CATALYSIS A-GENERAL, 2003, 253 (01) :135-150

[10] Surface characterization of zirconia-coated alumina and silica carriers [J].

Damyanova, S ;

Grange, P ;

Delmon, B .

JOURNAL OF CATALYSIS, 1997, 168 (02) :421-430

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