articleScientific ReportsSep 17, 2013GOLD OA

Single-crystalline, wormlike hematite photoanodes for efficient solar water splitting

JYJae Young KimGMGanesan MageshDHDuck Hyun YounJJJi‐Wook JangJKJun Kubota

Pohang University of Science and Technology · The University of Tokyo · +1 more institution

PubMed
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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…

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Topics & keywords

Topics
Keywords
  • Hematite
  • Water splitting
  • Materials science
  • Chemistry
  • Photocatalysis
  • Metallurgy
UN Sustainable Development Goals
  • Clean water and sanitation
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