Temperature effect on water splitting using a Si-doped hematite photoanode

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Paula Dias (Autor) FEUP; Tânia Lopes (Autor) FEUP; Luísa Andrade (Autor) FEUP; Adélio Mendes (Autor) FEUP

Revista

Título: Journal of Power Sources

Vol. 272

Páginas: 567-580

ISSN: 0378-7753

Editora: Elsevier

Indexação

ISI Web of Knowledge - 20 Citações

ISI Web of Science

Scopus - 27 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Projetos Associados

NanoPEC - Nanostructured photoelectrodes for energy conversion

H2Solar - Células fotoelectroquímicas para produção de hidrogénio a partir de energia solar

BI-DSC - Building Integrated Dye Sensitized Solar Cells

Outras Informações

ID Authenticus: P-009-TA8

DOI: 10.1016/j.jpowsour.2014.08.108

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