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Copper–cerium oxide catalysts supported on monoclinic zirconia: Structural features and catalytic behavior in preferential oxidation of carbon monoxide in hydrogen excess

Paper ID Volume ID Publish Year Pages File Format Full-Text
42559 45931 2009 6 PDF Available
Title
Copper–cerium oxide catalysts supported on monoclinic zirconia: Structural features and catalytic behavior in preferential oxidation of carbon monoxide in hydrogen excess
Abstract

Copper–cerium oxide catalysts supported on monoclinic zirconia CuO/CeO2/ZrO2 were tested in the preferential oxidation of CO in hydrogen-rich gases and the optimal catalyst composition was determined. The state and the structure of copper species in the catalysts were investigated by X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS) analysis. While a small amount of copper incorporated into the surface layers of the CeO2 lattice, the disordered oxide clusters were the main copper species in the catalysts with copper content ≤5 wt.%. The increase in the copper loading (>10 wt.%) led to predominant formation of bulk CuO phase coupled with catalyst deactivation.

Graphical abstractCopper–cerium oxide catalysts supported on monoclinic zirconia exhibited a good performance in preferential oxidation of CO in hydrogen-rich gases. The influence of catalyst composition on the state, structure and catalytic activity of copper species was investigated. The high activity was related to a high concentration of the finely dispersed copper (II) oxide clusters and the copper ions strongly interacting with CeO2.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Preferential CO oxidation; CeO2; ZrO2; Copper oxide clusters; Structure–activity relation; XAFS
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Copper–cerium oxide catalysts supported on monoclinic zirconia: Structural features and catalytic behavior in preferential oxidation of carbon monoxide in hydrogen excess
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 365, Issue 2, 31 August 2009, Pages 159–164
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