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

被引：35

作者：

Primo, Ana ^{[1
]}

Esteve-Adell, Ivan ^{[1
]}

Coman, Simona N. ^{[2
]}

Candu, Natalia ^{[2
]}

Parvulescu, Vasile I. ^{[2
]}

Garcia, Hermenegildo ^{[1
]}

机构：

[1] Univ Politecn Valencia, CSIC, Inst Univ Tecnol Quim, E-46022 Valencia, Spain

[2] Univ Bucharest, Dept Organ Chem Biochem & Catalysis, Bucharest 030018, Romania

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 02期

关键词：

coupling catalysts; graphene support; heterogeneous catalysis; oriented gold nanoparticles; HIGH-QUALITY; LARGE-AREA; NANOPARTICLES; GROWTH; FACETS;

D O I：

10.1002/anie.201508908

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：607 / 612

页数：6

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