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Silver Cluster Catalysts for Green Organic Synthesis

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Title: Silver Cluster Catalysts for Green Organic Synthesis
Authors: Shimizu, Ken-ichi Browse this author →KAKEN DB
Satsuma, Atsushi Browse this author
Keywords: Metal cluster
Green Chemistry
One-pot reaction
Issue Date: Nov-2011
Publisher: Japan Petroleum Institute
Journal Title: Journal of the Japan Petroleum Institute
Volume: 54
Issue: 6
Start Page: 347
End Page: 360
Publisher DOI: 10.1627/jpi.54.347
Abstract: Development of platinum-group-metal (PGM)-free  catalysts for green chemical synthesis is an important topic in synthetic catalysis, because PGM will soon be in short supply in the near future. Our group has paid attention to the catalytic functions of Ag clusters. Here, we summarize our recent work on size- and support-specific catalysis of Ag clusters for green organic synthesis. Ag clusters supported on Al2O3 act as effective heterogeneous catalysts for (1) oxidant-free dehydrogenation of alcohols to carbonyl compounds, (2) coupling of alcohols with amines to form amides and H2, (3) N-alkylation of anilines with alcohols, (4) C_C cross-coupling reaction of alcohols, (5) selective hydrogenation of nitroaromatics, and (6) direct synthesis of N-substituted anilines from nitroaromatics and alcohols. To establish a catalyst design concept, effects of Ag particle size and acid-base character of support oxides are investigated. The structure-activity relationships for all reactions show similar tendencies; metallic Ag clusters with smaller size and acid-base bifunctional nature of the support oxide are preferable. We propose that cooperation between coordinatively unsaturated Ag sites of Ag clusters and acidbase pair sites at the metal-support interface is a key concept for the design of Ag cluster catalysts for the above reactions.
Type: article
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 清水 研一

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