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 |
| |
| Authors: | Dr Ana Primo Ivan Esteve‐Adell Dr Simona N Coman Natalia Candu Prof Vasile I Parvulescu Prof Hermenegildo Garcia |
| |
| Institution: | 1. Instituto Universitario de Tecnología Química CSIC‐UPV, Universidad Politécnica de Valencia, Avda. de los Naranjos s/n, 46022 Valencia (Spain);2. Department of Organic Chemistry, Biochemistry, and Catalysis, University of Bucharest, Bd. Regina Elisabeta nr. 4–12, 030018 Bucharest (Romania) |
| |
| Abstract: | 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 ( /fl‐G), while the lateral sides were 0.0.1 oriented. Comparison of the catalytic activity of  /fl‐G films with powders of unoriented Au NPs supported on graphene showed that  /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. |
| |
| Keywords: | coupling catalysts graphene support heterogeneous catalysis oriented gold nanoparticles |
|
|
