Ca 2 Fe 2 O 5 is a p-type oxide that has not been previously investigated as a photocathode for use in a water splitting photoelectrochemical cell. In this study, Ca 2 Fe 2 O 5 was synthesized as a polycrystalline electrode, and its properties relevant to photoelectrochemical hydrogen production were investigated. Ca 2 Fe 2 O 5 electrodes were prepared by thermally annealing electrodeposited FeOOH films with a solution of Ca(NO 3 ) 2 drop-casted onto the electrode surface. The bandgap energy, band edge positions, flatband potential, photocurrent generation, and chemical and photoelectrochemical stabilities of Ca 2 Fe 2 O 5 were examined. The results showed that Ca 2 Fe 2 O 5 has an ideal bandgap and band positions that can enable the utilization of visible light for overall solar water splitting. Photocurrent–time measurements were also performed and the changes in morphology, crystallinity, and composition of the Ca 2 Fe 2 O 5 electrodes before and after the photocurrent measurement were investigated. This made it possible to examine the photostability of Ca 2 Fe 2 O 5 and elucidate the cause of the observed photocurrent decay.
No takes yet. Share an insight, caveat, or question.
Wheeler et al. (2018) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: