A study on the effect of support's reducibility on the reverse water-gas shift reaction over Pt catalysts

被引：192

作者：

Kim, Sung Su ^{[1
]}

Lee, Hyun Hee ^{[1
]}

Hong, Sung Chang ^{[1
]}

机构：

[1] Kyonggi Univ, Dept Environm Energy Syst Engn, Suwon 442760, Gyeonggi Do, South Korea

来源：

APPLIED CATALYSIS A-GENERAL | 2012年 / 423卷

关键词：

Pt; TiO2; RWGS; Catalyst; CARBON-DIOXIDE HYDROGENATION; NOBLE-METAL CATALYSTS; FORM METHANOL; TEMPERATURE; REDUCTION; PT/TIO2; PT/CEO2; CO; KINETICS; ABSENCE;

D O I：

10.1016/j.apcata.2012.02.021

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：

In this study, the effect of the reducibility of the support on the mechanism of the reverse water gas shift reaction over Pt/TiO2 and Pt/Al2O3 catalysts was examined using a differential and fixed bed reactor. The kinetic study showed that the reverse water gas shift reaction using the Pt/TiO2 and Pt/Al2O3 catalysts were consistent with the redox mechanism. An elementary reaction test and XPS analysis further confirmed that the reverse water gas shift reaction proceeded through the redox mechanism via oxidation and reduction at the Pt sites and reducible support sites on the catalyst surface. In the H-2 TPR and Fr-IR experiments, the Pt/TiO2 was shown to have a new active site located at the metal-support interface. Therefore, the Pt/TiO2 catalyst produced greater CO2 conversion and TOFs due to the presence of the new active site, which resulted from the strong metal-support interaction and higher reducibility of the support relative to the Pt/Al2O3 catalyst. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：100 / 107

页数：8

共 25 条

[1] Effects of reduction temperature and metal-support interactions on the catalytic activity Pt/γ-Al2O3 and Pt/TiO2 for the oxidation of CO in the presence and absence of H2 [J].

Alexeev, OS ;

Chin, SY ;

Engelhard, MH ;

Ortiz-Soto, L ;

Amiridis, MD .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (49) :23430-23443

[2] HYDROGEN-PRODUCTION FROM THE LOW-TEMPERATURE WATER-GAS SHIFT REACTION - KINETICS AND SIMULATION OF THE INDUSTRIAL REACTOR [J].

AMADEO, NE ;

LABORDE, MA .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 1995, 20 (12) :949-956

[3]

[Anonymous], 1995, Handbook of X-ray Photoelectron Spectroscopy. A Reference Book of Standard Spectra for Identification and Interpretation of XPS Data

[4] Synthesis and characterization of a new platinum supported catalyst based on poly-{acrylamide-co-[3-(acryloylamino)propyltrimethylammoniumchloride]} as carrier [J].

Baumgarten, E ;

Fiebes, A ;

Stumpe, A ;

Ronkel, F ;

Schultze, JW .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1996, 113 (03) :469-477

[5] 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

[6] FTIR study of the low-temperature water-gas shift reaction on Au/Fe2O3 and Au/TiO2 catalysts [J].

Boccuzzi, F ;

Chiorino, A ;

Manzoli, M ;

Andreeva, D ;

Tabakova, T .

JOURNAL OF CATALYSIS, 1999, 188 (01) :176-185

[7] ENHANCED ACTIVITY OF PD/TIO2 CATALYSTS FOR THE CO-H-2 REACTION IN THE ABSENCE OF STRONG METAL-SUPPORT INTERACTIONS (SMSI) [J].

BRACEY, JD ;

BURCH, R .

JOURNAL OF CATALYSIS, 1984, 86 (02) :384-391

[8] Study of iron-promoted Cu/SiO2 catalyst on high temperature reverse water gas shift reaction [J].

Chen, CS ;

Cheng, WH ;

Lin, SS .

APPLIED CATALYSIS A-GENERAL, 2004, 257 (01) :97-106

[9] Spectrokinetic investigation of reverse water-gas-shift reaction intermediates over a Pt/CeO2 catalyst [J].

Goguet, A ;

Meunier, FC ;

Tibiletti, D ;

Breen, JP ;

Burch, R .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (52) :20240-20246

[10] HOMOGENEOUS HYDROGENATION OF CARBON-DIOXIDE [J].

JESSOP, PG ;

IKARIYA, T ;

NOYORI, R .

CHEMICAL REVIEWS, 1995, 95 (02) :259-272

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