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Issue 1, 2013
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A novel strategy for surface treatment on hematite photoanode for efficient water oxidation

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Abstract

In this paper, we report a novel strategy for surface treatment of hematite nanorods for efficient photo-driven water oxidation. This is the first report describing the growth of Sn treated hematite from α-FeOOH nanorod arrays in one step without substantially altering morphologies. With this treatment the photocurrent density increased from 1.24 for pristine hematite nanorods to 2.25 mA cm−2 at 1.23 V vs. RHE (i.e. 81% improvement). The increase in photocurrent density was also accompanied by improved incident-photon-to-current efficiencies and oxygen evolution. The photocurrent improvement is mainly attributed to a reduced electron–hole recombination at the hematite–electrolyte interface through the formation of FexSn1−xO4 layer at the hematite nanorod surface as shown by XPS, HRTEM, EDAX line scan analyses and PEC measurements.

Graphical abstract: A novel strategy for surface treatment on hematite photoanode for efficient water oxidation

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Publication details

The article was received on 04 Jul 2012, accepted on 11 Sep 2012 and first published on 12 Sep 2012


Article type: Edge Article
DOI: 10.1039/C2SC20881D
Chem. Sci., 2013,4, 164-169

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    A novel strategy for surface treatment on hematite photoanode for efficient water oxidation

    L. Xi, S. Y. Chiam, W. F. Mak, P. D. Tran, J. Barber, S. C. J. Loo and L. H. Wong, Chem. Sci., 2013, 4, 164
    DOI: 10.1039/C2SC20881D

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