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Title:
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Surface treatment of hematite photoanodes with zinc acetate for water oxidation.
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Author:
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Xi, Lifei.; Bassi, Prince Saurabh.; Chiam, Sing Yang.; Mak, Wai Fatt.; Tran, Phong D.; Barber, James.; Loo, Joachim Say Chye.; Wong, Lydia Helena.
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Copyright year:
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2012 |
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Abstract:
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A simple and inexpensive method to form a hematite photoanode for efficient water oxidation is reported. A very thin ZnO overlayer was deposited on top of a thin film of hematite and found, compared with non-treated hematite, to increase the photocurrent and reduce the onset potential for generating oxygen from water. After 3 cycles of ZnAc treatment, the photocurrent increased more than 40% to 1.08 mA/cm-2 at 0.23 V vs Ag/AgCl and onset potential for water oxidation shifted by -170 mV. It is proposed the ZnO overlayer changes the flat band potential of hematite and reduces the surface defects. |
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Subject:
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DRNTU::Engineering::Materials. |
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Type:
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Journal Article |
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Series/ Journal Title:
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Nanoscale |
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School:
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School of Materials Science and Engineering |
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Rights:
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© 2012 Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale, Royal Society of Chemistry . It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1039/C2NR30862B ] |
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Version:
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Accepted version |
