One-Step Pyrolysis Preparation of 1.1.1 Oriented Gold Nanoplatelets Supported on Graphene and Six Orders of Magnitude Enhancement of the Resulting Catalytic Activity.
Angew Chem Int Ed Engl
; 55(2): 607-12, 2016 Jan 11.
Article
em En
| MEDLINE
| ID: mdl-26597312
ABSTRACT
Pyrolysis of chitosan films containing Au(3+) renders 1.1.1 oriented Au nanoplatelets (20â
nm lateral size, 3-4â
nm height) on a few layers of N-doped graphene (Au/fl-G), while the lateral sides were 0.0.1 oriented. Comparison of the catalytic activity of Au/fl-G films with powders of unoriented Au NPs supported on graphene showed that Au/fl-G films exhibit six orders of magnitude enhancement for three gold-catalyzed reactions, namely, Ullmann-like homocoupling, C-N cross coupling, and the oxidative coupling of benzene to benzoic acid. This enhancement is the result of the defined morphology, facet orientation of Au nanocrystals, and strong gold-graphene interaction.
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MEDLINE
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En
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Angew Chem Int Ed Engl
Ano de publicação:
2016
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Article