Better Together: Ilmenite/Hematite Junctions for Photoelectrochemical Water Oxidation.

ABSTRACT: Hematite (α-Fe₂O₃) is an earth-abundant indirect n-type semiconductor displaying a band gap of about 2.2 eV, useful for collecting a large fraction of visible photons, with frontier energy levels suitably aligned for carrying out the photoelectrochemical water oxidation reaction under basic conditions. The modification of hematite mesoporous thin-film photoanodes with Ti(IV), as well as their functionalization with an oxygen-evolving catalyst, leads to a 6-fold increase in photocurrent density with respect to the unmodified electrode. In order to provide a detailed understanding of this behavior, we report a study of Ti-containing phases within the mesoporous film structure. Using X-ray absorption fine structure and high-resolution transmission electron microscopy cou

SUBMITTER: Berardi S 

PROVIDER: S-EPMC8014905 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature