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

A novel two-step method was developed to prep. gold nanoparticles on boron-doped diamond (BDD) electrode. It consisted of sputter deposition of max. 15 equiv monolayers of gold, followed by a heat treatment at 400-600 Deg in air. The as-sputtered gold deposits were highly dispersed (estd. 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 SEM and cyclic voltammetry. Gold nanoparticles with an av. size of 15-35 nm could be prepd. by this method on polycryst. BDD film electrode, the particle size being dependent of the deposited amt. The invariant voltammetric response of the heat-treated gold deposits confirmed their applicability for electrocatalysis. [on SciFinder (R)]


Published in:
Electrochemistry Communications, 7, 4, 398-405
Year:
2005
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 Record created 2006-02-22, last modified 2018-01-27


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