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Catalytic activity improvement of Ni3Al foils for methanol decomposition by oxidation–reduction pretreatment

Paper ID Volume ID Publish Year Pages File Format Full-Text
41607 45894 2011 7 PDF Available
Title
Catalytic activity improvement of Ni3Al foils for methanol decomposition by oxidation–reduction pretreatment
Abstract

A two-step pretreatment, oxidation in air followed by reduction in hydrogen, was performed on Ni3Al foils to improve the catalytic activity for methanol decomposition. A two-layer structure, Ni/Al2O3, was formed over the foil surface which was oxidized at 973 K and reduced, whereas a three-layer structure, Ni/NiAl2O4/Al2O3, was formed over the foil surface that was oxidized at 1173 K and reduced. In both cases the outmost Ni layer consisted of polycrystals and continuously covered the underlying oxides. Both pretreated foils exhibited lower onset temperature and enhanced catalytic activity for methanol decomposition into H2 and CO, compared to the untreated foil, and the difference between them was very small. In addition, they exhibited a good stability in catalytic performance at 673 K. The results demonstrate that the oxidation–reduction pretreatment effectively improves the catalytic performance of Ni3Al foil by the formation of an outmost Ni layer on the foil surface.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (101 K)Download as PowerPoint slideHighlights► The Ni/Al2O3 layer formed over the Ni3Al foil reduced after oxidation at 973 K. ► The Ni/NiAl2O4/Al2O3 layer formed over the Ni3Al foil reduced after oxidation at 1173 K. ► Both pretreated foils exhibited considerably improved catalytic activity for methanol decomposition. ► High activity was attributed to the formation of the outmost Ni layer.

Keywords
Ni3Al foil; Ni catalysts; Oxidation–reduction; Pretreatment; Methanol decomposition
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Catalytic activity improvement of Ni3Al foils for methanol decomposition by oxidation–reduction pretreatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 398, Issues 1–2, 15 May 2011, Pages 161–167
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
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Any Questions? feel free to contact us