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Co3O4-decorated hematite nanorods as an effective photoanode for solar water oxidation

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Co3O4-decorated hematite nanorods as an effective photoanode for solar water oxidation

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Title: Co3O4-decorated hematite nanorods as an effective photoanode for solar water oxidation
Author: Xi, Lifei; Tran, Phong D.; Chiam, Sing Yang; Bassi, Prince Saurabh; Mak, Wai Fatt; Mulmudi, Hemant Kumar; Batabyal, Sudip Kumar; Barber, James; Loo, Say Chye Joachim; Wong, Lydia Helena
Copyright year: 2012
Abstract: In this paper, we report a strategy to perform in-situ incorporation of oxygen evolution catalyst (OEC), Co3O4, during hydrothermal growth of Fe2O3 nanorod arrays. It was found that the highest photocurrent increase and onset potential shift was observed with 5% Co2+. The photocurrent density increases from 0.72 for the pristine Fe2O3 nanorod to 1.20 mA/cm2 at 1.23 V vs RHE (i.e. 67 % improvement) with 5 % Co2+ added. Concomitant with this improvement was a shift in the onset potential by about 40 mV and improvements in incident-photo-to-current-efficiencies (IPCE) and oxygen evolution. Hematite photoanodes with in-situ deposition of Co3O4 nanoparticles showed better performance than those prepared by ex-situ procedures because of high surface roughness, larger Co3O4/hematite interfacial area and smaller Co3O4 particle size.
Subject: DRNTU::Engineering::Materials
Type: Journal Article
Series/ Journal Title: Journal of physical chemistry C
School: School of Materials Science and Engineering
Rights: © 2012 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Physical Chemistry C, American Chemical Society. 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/10.1021/jp304285r].
Version: Accepted version

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