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- Title
Single-crystalline, wormlike hematite photoanodes for efficient solar water splitting.
- Authors
Jae Young Kim; Ganesan Magesh; Duck Hyun Youn; Ji-Wook Jang; Jun Kubota; Kazunari Domen; Jae Sung Lee
- Abstract
A hematite photoanode showing a stable, record-breaking performance of 4.32 mA/cm2 photoelectrochemical water oxidation current at 1.23 V vs. RHE under simulated 1-sun (100 mW/cm2) irradiation is reported. This photocurrent corresponds to ca. 34% of the maximum theoretical limit expected for hematite with a band gap of 2.1 V. The photoanode produced stoichiometric hydrogen and oxygen gases in amounts close to the expected values from the photocurrent. The hematitle has a unique single-crystalline "wormlike" morphology produced by in-situ two-step annealing at 550°C and 800°C of β-FeOOH nanorods grown directly on a transparent conducting oxide glass via an all-solution method. In addition, it is modified by platinum doping to improve the charge transfer characteristics of hematite and an oxygen-evolving co-catalyst on the surface.
- Subjects
HEMATITE; CHARGE transfer; PHOTOELECTROCHEMICAL cells; ELECTRON donor-acceptor complexes; OXIDE minerals
- Publication
Scientific Reports, 2013, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep02681