Preparation of gold nanoparticles by heat treatment of sputter deposited gold on boron-doped diamond film electrode
Preparation of gold nanoparticles by heat treatment of sputter deposited gold on boron-doped diamond film electrode
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DOI：
10.1016/j.elecom.2005.02.014
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发表时间：
2005-04
影响因子：
5.4
通讯作者：
B. Roustom;G. Foti;C. Comninellis
中科院分区：
文献类型：
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作者：
B. Roustom;G. Foti;C. Comninellis
提出了一种在掺硼金刚石（BDD）电极上制备金纳米粒子的两步法。它包括溅射沉积最多15个当量的单层金，然后在空气中在400-600°C下进行热处理。溅射态的金沉积物是高度分散的（估计颗粒尺寸为2- 7 nm），但也是不稳定的，在硫酸的稳定区域中的连续电位循环导致沉积的金的完全损失。溅射沉积物的后续热处理导致形成稳定的人口的纳米级的金颗粒，其特征在于通过扫描电子显微镜和循环伏安法。通过该方法可以在多晶BDD膜电极上制备平均尺寸为15- 35 nm的金纳米颗粒，其粒径取决于沉积量。不变的伏安响应的热处理的金沉积物证实了它们的适用性电催化。
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°C in air. The as-sputtered gold deposits were highly dispersed (estimated particle size of 2–7nm) 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 15–35nm 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.