Preparation of gold nanoparticles by heat treatment of sputter deposited gold on boron-doped diamond film electrode

被引：54
作者：
El Roustom, B [1 ]
Fóti, G [1 ]
Comninellis, C [1 ]
机构：
[1] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2005年 / 7卷 / 04期
关键词：
gold nanoparticles; boron-doped diamond; sputter deposition; heat treatment; electrochemical stability; electrocatalysis;
D O I：
10.1016/j.elecom.2005.02.014
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A novel two-step method was developed to synthesize gold nanoparticles on boron-doped diamond (BDD) electrode. It consisted of sputter deposition of maximum 15 equivalent monolayers of gold, followed by a heat treatment at 400-600 degrees C in air. The as-sputtered gold deposits were highly dispersed (estimated particle size of 2-7 nm) but also unstable, a continuous potential cycling in the stability region of sulfuric acid leading to complete loss of the deposited gold. Subsequent heat treatment of as-sputtered deposits resulted in formation of a stable population of nanosized gold particles characterized by scanning electron microscopy and cyclic voltammetry. Gold nanoparticles with an average size of 15-35 nm could be prepared by this method on polycrystalline BDD film electrode, the particle size being dependent of the deposited amount. The invariant voltammetric response of the heat-treated gold deposits confirmed their applicability for electrocatalysis. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：398 / 405
页数：8
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