Journal
CHEMPHYSCHEM
Volume 13, Issue 12, Pages 3025-3034Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201200069
Keywords
anodization; hydrogen; laser spectroscopy; photochemistry; tungsten
Funding
- Ministerio de Ciencia e Innovacion (MICINN) of Spain [Consolider HOPE CSD2007-00007]
- Generalitat Valenciana [PROMETEO/2009/058]
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Anodically grown WO3 photoelectrodes prepared in an N-methylformamide (NMF) electrolyte have been investigated with the aim of exploring the effects induced by anodization time and water concentration in the electrochemical bath on the properties of the resulting photoanodes. An n-type WO3 semiconductor is one of the most promising photoanodes for hydrogen production from water splitting and the electrochemical anodization of tungsten allows very good photoelectrodes, which are characterized by a low charge-transfer resistance and an increased spectral response in the visible region, to be obtained. These photoanodes were investigated by a combination of steady state and transient photoelectrochemical techniques and a correlation between photocurrent produced, morphology, and charge transport has been evaluated.
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