Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/106171
Title: A novel strategy for surface treatment on hematite photoanode for efficient water oxidation
Authors: Xi, Lifei
Chiam, Sing Yang
Mak, Wai Fatt
Tran, Phong D.
Barber, James
Loo, Say Chye Joachim
Wong, Lydia Helena
Keywords: DRNTU::Engineering::Materials
Issue Date: 2013
Source: Xi, L., Chiam, S. Y., Mak, W. F., Tran, P. D., Barber, J., & Loo, S. C. J., et al. (2013). A novel strategy for surface treatment on hematite photoanode for efficient water oxidation. Chemical science, 4(1), 164-169.
Series/Report no.: Chemical science
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.
URI: https://hdl.handle.net/10356/106171
http://hdl.handle.net/10220/17714
DOI: 10.1039/c2sc20881d
Fulltext Permission: none
Fulltext Availability: No Fulltext
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