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Inverse rod-like CeO2 supported on CuO prepared by hydrothermal method for preferential oxidation of carbon monoxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
50588 46803 2012 5 PDF Available
Title
Inverse rod-like CeO2 supported on CuO prepared by hydrothermal method for preferential oxidation of carbon monoxide
Abstract

The CeO2/CuO catalysts were synthesized by the hydrothermal method and characterized via XRD, BET, SEM, H2-TPR, XPS and HRTEM techniques. The results showed that CeO2 with two kinds of morphologies (particle and rod-like CeO2) was highly dispersed on the surface of the catalysts when Ce/Cu molar ratio exceeded 0.25. The rod-like CeO2 exposed more (1 1 1) planes, and this was helpful for oxygen storage and transportation. Moreover, the contact interface between highly dispersed CuO and bulk ceria supplied the active sites not only for CO oxidation but also for H2 oxidation, but the contact interface of highly dispersed ceria and bulk CuO was more favorable for CO oxidation than H2 oxidation.

Graphical abstractIt was clear that the temperature window of CO total conversion over the CeO2/CuO catalysts was wider than that of the traditional CuO/CeO2 catalyst, also the selectivity of the CeO2/CuO catalysts was obviously higher that of the traditional CuO/CeO2 catalyst in the temperature range of performance test. These results showed that the contact interface between highly dispersed CuO and bulk ceria supplied the active sites not only for CO oxidation but also for H2 oxidation, but the contact interface of highly dispersed ceria and bulk CuO was more favorable for CO oxidation than H2 oxidation.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Inverse CeO2/CuO catalysts were synthesized by hydrothermal method for CO-PROX. ► Particle and rod-like CeO2 was highly dispersed on the surface of catalysts. ► Rod-like CeO2 exposed more (1 1 1) planes and helped O2 storage and transportation. ► Contact interface of CuO and bulk CeO2 supplied active sites for CO and H2 oxidation. ► Contact interface of CeO2 and bulk CuO was more favorable for CO oxidation.

Keywords
CeO2/CuO; Rod; Particle; Hydrogen; CO-PROX
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Inverse rod-like CeO2 supported on CuO prepared by hydrothermal method for preferential oxidation of carbon monoxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 23, 5 June 2012, Pages 62–66
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