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
Pyrolysis of chitosan films containing Au3+ renders 1.1.1 oriented Au nanoplatelets (20 nm lateral size, 3-4 nm height) on a few layers of N-doped graphene ((Lambda) over baru/fl-G), while the lateral sides were 0.0.1 oriented. Comparison of the catalytic activity of (Lambda) over baru/fl-G films wi...
| Autores: | , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2016 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositório: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglês |
| OAI Identifier: | oai:riunet.upv.es:10251/83047 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/83047 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Coupling catalysts,graphene support,heterogeneous catalysis,oriented gold nanoparticles coupling catalysts graphene support heterogeneous catalysis oriented gold nanoparticles QUIMICA ORGANICA |
| Resumo: | Pyrolysis of chitosan films containing Au3+ renders 1.1.1 oriented Au nanoplatelets (20 nm lateral size, 3-4 nm height) on a few layers of N-doped graphene ((Lambda) over baru/fl-G), while the lateral sides were 0.0.1 oriented. Comparison of the catalytic activity of (Lambda) over baru/fl-G films with powders of unoriented Au NPs supported on graphene showed that (Lambda) over baru/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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