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Nano Lett. 2011 Jan 12;11(1):35-43. doi: 10.1021/nl1022354. Epub 2010 Dec 7.

Influence of plasmonic Au nanoparticles on the photoactivity of Fe₂O₃ electrodes for water splitting.

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  • 1Laboratory of Photonics and Interfaces, Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.

Abstract

An experimental study of the influence of gold nanoparticles on α-Fe(2)O(3) photoanodes for photoelectrochemical water splitting is described. A relative enhancement in the water splitting efficiency at photon frequencies corresponding to the plasmon resonance in gold was observed. This relative enhancement was observed only for electrode geometries with metal particles that were localized at the semiconductor-electrolyte interface, consistent with the observation that minority carrier transport to the electrolyte is the most significant impediment to achieving high efficiencies in this system.

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