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

Paper ID Volume ID Publish Year Pages File Format Full-Text
41004 45874 2012 8 PDF Available
Title
A study on the effect of support's reducibility on the reverse water-gas shift reaction over Pt catalysts
Abstract

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 H2 TPR and FT-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.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (104 K)Download as PowerPoint slideHighlight► The Pt/TiO2 catalyst shows a high level of activity in the RWGS reaction. ► Catalytic activity was dependent on Pt dispersion and support's reducibility. ► The RWGS reaction was in agreement with the surface redox mechanism.

Keywords
Pt; TiO2; RWGS; Catalyst
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A study on the effect of support's reducibility on the reverse water-gas shift reaction over Pt catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 423–424, 7 May 2012, Pages 100–107
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us