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Author(s): Paula Dias
Tânia Lopes
Luísa Andrade
Adélio Mendes
Title: Temperature effect on water splitting using a Si-doped hematite photoanode
Issue Date: 2014
Abstract: 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 byphotocurrent-voltage (JeV) characteristic curves and electrochemical impedance spectroscopy atdifferent cell operating temperatures, from 25 C to 65 C. A standard three-electrode configurationcomprehending the photoelectrode of hematite, the counter-electrode of pure platinum wire (99.9%) andthe reference electrode of Ag/AgCl/Sat.KCl was used. The identification of possible degradation pathwayswas addressed. It was observed that the generated photocurrent density increased with temperature.However, the photoelectrode became unstable above 50 C. The experiments performed concerning thestudy of the temperature effect and the aging showed that the optimal operation temperature of the PECcell 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 realoutdoor conditions.
Subject: Engenharia química, Engenharia química
Chemical engineering, Chemical engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia química
Engineering and technology::Chemical engineering
Related Information: info:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/227179 /Nanostructured photoelectrodes for energy conversion/NanoPEC
info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projectos de I&DT em Todos os Domínios Científicos/PTDC/EQU-EQU/107990/2008/Células fotoelectroquímicas para produção de hidrogénio a partir de energia solar/H2Solar
info:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/321315/Building Integrated Dye Sensitized Solar Cells/BI-DSC
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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