Resumo (PT):
Abstract (EN):
For a sustainable future, efficient solar energy harvesting and storage is required. Solar hydrogen production from photoelectrochemical water splitting is a promising technology and, in particular, cuprous
oxide photocathodes are interesting photoelectrodes due to their high efficiency and low cost. However,
chemical instability inhibits practical application of such devices. This work reports a novel strategy for
protecting cuprous oxide from photocorrosion, wherein a thin SnO2 overlayer enables increased stability
over previous reports utilizing TiO2 protective layers. Performance and stability are influenced by the film
thickness, post-deposition steam treatment, and the nature of the heterojunction interface. Stability over
57 h of sustained photoelectrochemical water reduction, maintaining 90% of initial photocurrent, is
achieved.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
7