Título: Journal of Power SourcesImportada do Authenticus Pesquisar Publicações da Revista

Vol. 272

Páginas: 567-580

ISSN: 0378-7753

Editora: Elsevier

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INSPEC

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

ID Authenticus: P-009-TA8

DOI: 10.1016/j.jpowsour.2014.08.108

Resumo (PT):

Abstract (EN): The influence of temperature on the performance of a photoelectrochemical (PEC) cell prepared with Sidoped hematite photoanode was studied for water splitting. The cell performance was characterized by photocurrent-voltage (JeV) characteristic curves and electrochemical impedance spectroscopy at different cell operating temperatures, from 25 C to 65 C. A standard three-electrode configuration comprehending the photoelectrode of hematite, the counter-electrode of pure platinum wire (99.9%) and the reference electrode of Ag/AgCl/Sat.KCl was used. The identification of possible degradation pathways was addressed. It was observed that the generated photocurrent density increased with temperature. However, the photoelectrode became unstable above 50 C. The experiments performed concerning the study of the temperature effect and the aging showed that the optimal operation temperature of the PEC cell is ca. 45 C; this temperature ensures simultaneously the highest photocurrent density and stability. This study is important for understanding the behavior of hematite photoelectrodes operating under real outdoor conditions.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: Publicação abrangida pelo Journal Citation Reports 2015

Nº de páginas: 14