Photoelectrochemical Properties of SnO₂ Photoanodes Sensitized by Cationic Perylene-Di-Imide Aggregates for Aqueous HBr Splitting.

ABSTRACT: Perylene-sensitized mesoporous SnO₂ films were used as electrodes for photoelectrochemical HBr splitting in aqueous solution. Upon AM 1.5 G illumination a 3-4 fold increase of the saturated photocurrent was observed when decreasing the pH of the aqueous solution from pH 3 to pH 0 (j ^max = 0.05 ± 0.01 mAcm^-2 at pH 3 and 0.17 ± 0.02 mAcm^-2 at pH 0, respectively). A detailed spectroscopic and electrochemical analysis of the hybrid material was carried out in order to address the impact of interfacial energetics on charge separation dynamics. UV/Vis spectroelectrochemical measurements showed that the energy of semiconductor states in such systems can be adjusted independently from the molecular levels by varying proton concentration. Photoelec

SUBMITTER: Benazzi E 

PROVIDER: S-EPMC7116044 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature