Publicación

Tipo de publicación: Artículos científicos (Publicados en revistas de divulgación o científicas)

Título del artículo: CHARGE TRANSFER AND RECOMBINATION KINETICS AT WO3 FOR PHOTOELECTROCHEMICAL WATER OXIDATION

Registrado por: ELECTROCHIMICA ACTA

Año de publicación: 2017

Resumen: The photoelectrochemical properties of nanostructured, porous WO3 films deposited by screen printing have been characterized by steady-state and small signal modulation methods as a function of film thickness. Monoclinic WO3 with a wide particle size distribution between 50 and 500 nm was synthesized by a very simple method, via the dehydration of tungstic acid. Related to the open morphology and relatively large feature sizes, the optimal thickness for light harvesting and current collection is about 12 mm for front-side and about 20 mm for backside illumination. Intensity-modulated photocurrent spectroscopy (IMPS) shows that the rate constant for charge transfer to the electrolyte solution is larger than that for surface recombination in most of the applied potential range, illustrating the promise of the material. However, charge collection is found to be an important process that can limit the photocurrent, especially for thicker electrodes in the photocurrent onset potential region

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Autor(es): MANUEL RODRIGUEZ-PEREZ , INGRID RODRIGUEZ-GUTIERREZ , ALBERTO VEGA-POOT , RODRIGO GARCIARODRIGUEZ , GEONEL RODRIGUEZ-GATTORNO , GERKO OSKAM

Campo: Energía

Disciplina: Energías alternativas y renovables

Subdisciplina: Fuentes de energía no convencionales

Número de registro: ISSN: 00134686