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Study of Sm2O3-doped CeO2–Al2O3-supported Pt catalysts for partial CH4 oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
41438 45889 2011 12 PDF Available
Title
Study of Sm2O3-doped CeO2–Al2O3-supported Pt catalysts for partial CH4 oxidation
Abstract

The effect of xSm2O3 addition to yCeO2–Al2O3-supported Pt catalysts (where x and y are the Sm2O3 and CeO2 content, respectively, giving x + y = 12 wt.%) on the surface, structure and catalytic properties of the catalysts was studied. The samples were characterized using various techniques, such as N2 adsorption–desorption isotherms, XRD, XPS, FTIR and TPR. The catalytic properties of the catalysts were evaluated in the reaction of partial oxidation of methane. The relationship between the catalytic performance and physichochemical properties of Pt/xSm2O3–yCeO2–Al2O3 catalysts was evaluated. The improvement of the catalytic activity and stability observed for Sm2O3-doped CeO2–Al2O3-supported Pt catalysts was attributed to the increase of the platinum metallic dispersion, reducibility and oxygen storage capacity. An optimum interaction between the platinum oxide species and the total surface oxygen vacancies was observed at Sm2O3 content of 3 wt.% revealed by TPR.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (68 K)Download as PowerPoint slideHighlights► Sm-doped CeO2 over alumina has bifunctional effect on supported Pt catalysts. ► Addition of Sm increases the reducibility and dispersion of Pt. ► Pt/SmCeAl catalysts show the best catalytic performance in partial oxidation of methane.

Keywords
Pt catalysts; Sm2O3–CeO2–Al2O3 oxides; Partial oxidation of methane; Sol–gel method; Characterization
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Study of Sm2O3-doped CeO2–Al2O3-supported Pt catalysts for partial CH4 oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 399, Issues 1–2, 31 May 2011, Pages 134–145
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