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Enhanced carbon monoxide oxidation activity over gold–ceria nanocomposites

Paper ID Volume ID Publish Year Pages File Format Full-Text
48221 46496 2008 7 PDF Available
Title
Enhanced carbon monoxide oxidation activity over gold–ceria nanocomposites
Abstract

The composites with nanosized gold loaded in nanoporous ceria were prepared on a large scale by a facial and environment-benign sol–gel process. These materials were characterized by XRD, ICP, BET, UV–vis absorption, XPS, HRTEM and EDX. The main factors such as size and surface state of the Au and defect in the ceria could be adjusted by acid treatment of the composites in ascorbic acid solution to improve the activity and decrease the content of noble metal Au in the materials. Enhanced catalytic activities were obtained for the CO oxidation reaction over the catalysts due to the small crystal sizes with narrow size distributions of gold nanoparticles, a large amount of defects in the nanoporous ceria support, as well as a high ratio of Au3+/Au0 in the nanocomposites.

Keywords
Gold–ceria nanocomposites; Enhanced catalytic activity; Low content of Au; CO oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 84, Issues 3–4, 1 December 2008, Pages 790–796
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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