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Pt/MnOx–CeO2 catalysts for the complete oxidation of formaldehyde at ambient temperature

Paper ID Volume ID Publish Year Pages File Format Full-Text
48482 46509 2008 7 PDF Available
Title
Pt/MnOx–CeO2 catalysts for the complete oxidation of formaldehyde at ambient temperature
Abstract

MnOx–CeO2 mixed oxides with a Mn/(Mn + Ce) molar ratios of 0–1 were prepared by a modified coprecipitation method and investigated for the complete oxidation of formaldehyde. The MnOx–CeO2 with Mn/(Mn + Ce) molar ratio of 0.5 exhibited the highest catalytic activity among the MnOx–CeO2 mixed oxides. Structure analysis by X-ray powder diffraction and temperature-programmed reduction of hydrogen revealed that the formation of MnOx–CeO2 solid solution greatly improved the low-temperature reducibility, resulting in a higher catalytic activity for the oxidation of formaldehyde. Promoting effect of Pt on the MnOx–CeO2 mixed oxide indicated that both the Pt precursors and the reduction temperature greatly affected the catalytic performance. Pt/MnOx–CeO2 catalyst prepared from chlorine-free precursor showed extremely high activity and stability after pretreatment with hydrogen at 473 K. 100% conversion of formaldehyde was achieved at ambient temperature and no deactivation was observed for 120 h time-on-stream. The promoting effect of Pt was ascribed to enhance the effective activation of oxygen molecule on the MnOx–CeO2 support.

Keywords
MnOx–CeO2 mixed oxides; Pt/MnOx–CeO2 catalyst; Complete oxidation; Formaldehyde; Platinum precursor
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Pt/MnOx–CeO2 catalysts for the complete oxidation of formaldehyde at ambient temperature
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 81, Issues 1–2, 30 May 2008, Pages 115–121
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