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

Ana Primo; Ivan Esteve-Adell; Simona N Coman; Natalia Candu; Vasile I Parvulescu; Hermenegildo Garcia

doi:10.1002/anie.201508908

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. 2016 Jan 11;55(2):607-12. doi: 10.1002/anie.201508908. Epub 2015 Nov 24.

Authors

Ana Primo¹, Ivan Esteve-Adell¹, Simona N Coman², Natalia Candu², Vasile I Parvulescu³, Hermenegildo Garcia⁴

Affiliations

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).
³ Department of Organic Chemistry, Biochemistry, and Catalysis, University of Bucharest, Bd. Regina Elisabeta nr. 4-12, 030018 Bucharest (Romania). vasile.parvulescu@chimie.unibuc.ro.
⁴ Instituto Universitario de Tecnología Química CSIC-UPV, Universidad Politécnica de Valencia, Avda. de los Naranjos s/n, 46022 Valencia (Spain). hgarcia@qim.upv.es.

PMID: 26597312
DOI: 10.1002/anie.201508908

Abstract

Pyrolysis of chitosan films containing Au(3+) renders 1.1.1 oriented Au nanoplatelets (20 nm lateral size, 3-4 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.

Keywords: coupling catalysts; graphene support; heterogeneous catalysis; oriented gold nanoparticles.

Publication types

Research Support, Non-U.S. Gov't