Comparative in Situ DRIFTS-MS Study of 12CO- and 13CO-TPR on CuO/CeO2 Catalyst

被引：103

作者：

Bera, Parthasarathi ^{[1
]}

Lopez Camara, Antonio ^{[1
]}

Hornes, Aitor ^{[1
]}

Martinez-Arias, Arturo ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 24期

关键词：

TRANSFORM INFRARED-SPECTROSCOPY; SELECTIVE CO OXIDATION; CARBON-MONOXIDE; CUO-CEO2; CATALYSTS; COPPER-CERIA; PREFERENTIAL OXIDATION; COMBUSTION METHOD; ROOM-TEMPERATURE; REDOX PROPERTIES; OXIDE SURFACES;

D O I：

10.1021/jp9020504

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 ceria-supported copper oxide catalyst has been examined with respect to interaction with CO by means of CO-TPR tests employing a DRIFTS cell as reactor. Parallel analysis of isotopic shifts in the DRIFTS spectra obtained upon interaction of the catalysts with either (CO)-C-12 or (CO)-C-13 allows unambiguous assignment of the various carbonyl and carbonate-type species formed. The study is complemented by separate examination of the stability of carbonyl species focused to get hints on the nature of CO adsorption centers at the catalyst surface. Joint analysis of gases evolution during the CO-TPR tests and DRIFTS spectra is employed to determine the nature of processes taking place during such tests. Additionally, analysis of the various CO2 isotopes evolving during the course of a TPO run subsequent to (CO)-C-13-TPR test is employed to discard the occurrence of CO disproportionation upon interaction of the catalyst with CO up to 400 degrees C.

引用

页码：10689 / 10695

页数：7

共 46 条

[1] Selective CO oxidation over CuO-CeO2 catalysts prepared via the urea-nitrate combustion method [J].

Avgouropoulos, G ;

Ioannides, T .

APPLIED CATALYSIS A-GENERAL, 2003, 244 (01) :155-167

[2] Adsorption and reaction of CO on CuO-CeO2 catalysts prepared by the combustion method [J].

Avgouropoulos, George ;

Ioannides, Theophilos .

CATALYSIS LETTERS, 2007, 116 (1-2) :15-22

[3] An FTIR study of surface ceria hydroxy groups during a redox process with H-2 [J].

Badri, A ;

Binet, C ;

Lavalley, JC .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (23) :4669-4673

[4] Spectroscopic study of CO adsorption on palladium-ceria catalysts [J].

Bensalem, A ;

Muller, JC ;

Tessier, D ;

BozonVerduraz, F .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (17) :3233-3237

[5] Structural investigation of combustion synthesized Cu/CeO2 catalysts by EXAFS and other physical techniques:: Formation of a Ce1-xCuxO2-δ solid solution [J].

Bera, P ;

Priolkar, KR ;

Sarode, PR ;

Hegde, MS ;

Emura, S ;

Kumashiro, R ;

Lalla, NP .

CHEMISTRY OF MATERIALS, 2002, 14 (08) :3591-3601

[6] 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

[7] A SPECTROSCOPIC CHARACTERIZATION OF THE REDUCTION OF CERIA FROM ELECTRONIC-TRANSITIONS OF INTRINSIC POINT-DEFECTS [J].

BINET, C ;

BADRI, A ;

LAVALLEY, JC .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (25) :6392-6398

[8] FT-IR STUDY OF THE SURFACE OF COPPER-OXIDE [J].

BUSCA, G .

JOURNAL OF MOLECULAR CATALYSIS, 1987, 43 (02) :225-236

[9] FT-IR STUDY OF THE ADSORPTION AND TRANSFORMATION OF FORMALDEHYDE ON OXIDE SURFACES [J].

BUSCA, G ;

LAMOTTE, J ;

LAVALLEY, JC ;

LORENZELLI, V .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (17) :5197-5202

[10] On the role of redox properties of CuO/CeO2 catalysts in the preferential oxidation of CO in H2-rich gases [J].

Caputo, Tiziana ;

Lisi, Luciana ;

Pirone, Raffaele ;

Russo, Gennaro .

APPLIED CATALYSIS A-GENERAL, 2008, 348 (01) :42-53

← 1 2 3 4 5 →