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

• Type: Article in International Scientific Journal
• Date: 2014

Authors

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

Journal

Title: Journal of Power Sources

Vol. 272

Pages: 567-580

ISSN: 0378-7753

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 20 Citations

ISI Web of Science

Scopus - 27 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Associated Projects

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

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

Notes: Publicação abrangida pelo Journal Citation Reports 2015

No. of pages: 14