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

Vol. 454

ISSN: 0378-7753

Editora: Elsevier

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ISI Web of Science

Scopus - 9 Citações

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CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

FOS: Ciências da engenharia e tecnologias > Engenharia química

ID Authenticus: P-00R-TRJ

DOI: 10.1016/j.jpowsour.2020.227890

Abstract (EN): This work reports a 200 cm(2) PEC-PV device that comprises four 50 cm(2) PEC cells coupled in a modular array and optimized for continuous operation under concentrated sunlight. The developed module is the second largest PEC-PV device ever reported and the first tested under natural concentrated sunlight (up to 12.8 kW m(-2)). Demonstration tests were conducted outdoor in a continuous operation mode, over four days and using highly stable hematite photoelectrodes. When assembled with four multi-PE windows, each comprising eight small nanostructured photoelectrodes connected in parallel, the module generated a stable current density of ca. 2.0 mA cm(-2 )at 1.45 V, resulting in an average hydrogen production rate of 5.6 x 10(-5) g(H2) h(-1) cm(-2) (based on the net active area). A maximum current density of ca. 4.0 mA cm(-2) was reached during J-V measurements (before the dark current onset potential). It was observed that when hematite photoelectrodes are subjected to gradually higher solar irradiances the generated photocurrent follows a logarithmic saturation behaviour. This work provides important insights for demonstrating the viability of solar-driven water electrolysis by presenting a PEC-PV device that answers to the main challenges of large-scale photoelectrochemical hydrogen production.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13