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Catalysis by gold: New insights into the support effect

Paper ID Volume ID Publish Year Pages File Format Full-Text
32094 44899 2013 14 PDF Available
Title
Catalysis by gold: New insights into the support effect
Abstract

•Recent progresses in the effect of support on gold catalysts are reviewed.•The supports for metal catalysts are classified into reducible metal-oxide (RMO) and irreducible oxide (IRO).•Bimetallic and nanoporous gold are ascribed to inversely RMO supported gold catalysts.•Metal–support interactions are compared in Au and platinum group metal systems.

SummaryThe metal–support interaction (MSI) plays an essential role in the catalysis by gold. We summarized the support effect on the catalysis by gold in this review. According to the reducibility of the oxide supports, we divide the supports into two categories: reducible metal-oxide (RMO) and irreducible oxide (IRO) supports. The catalytic mechanisms for low-temperature CO oxidation over RMO supported gold catalysts are discussed based on the recent progress on this topic and the key role of gold–support interface in the catalytic reactions is highlighted. To prolong the perimeters of the gold–support interfaces, one can both decrease the sizes of gold nanoparticles (GNPs) and tune the morphology of the support (e.g., shape, size, etc.). From the point of view of decreasing the size of both gold and the support simultaneously for maximizing the boundary of gold and the support, we classify the gold-based bimetallic catalysts into metal supported gold and inversely metal/RMO supported gold. The nanoporous gold (NPG) synthesized by dealloying bulk Au–Ag alloy can also be considered as an inversely Ag/AgOx supported gold catalyst. Thus, the traditional concept of support can be extended greatly. Finally, the strong metal–support interaction (SMSI) in the Au-based and Pt-based system has been compared to show the distinctive feature of gold catalysts.

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Keywords
Gold; Catalysis; Support effect; Inversely supported gold; Strong metal–support interaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: - Volume 8, Issue 4, August 2013, Pages 403–416
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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