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Publication Type : Journal Article
Publisher : American Chemical Society
Source : The Journal of Physical Chemistry C, American Chemical Society, Volume 116, Number 26, p.13884-13889 (2012)
Campus : Coimbatore
School : Center for Industrial Research and Innovation
Center : Center for Industrial Research and Innovation (ACIRI)
Department : Industrial Research & Innovation
Year : 2012
Abstract : In this Article, we report a strategy to perform in situ incorporation of oxygen evolution catalyst, 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 versus RHE (i.e., 67% improvement) with 5% Co2+ added. Concomitant with this improvement was a shift in the onset potential by ∼40 mV and improvements in incident-photon-to-current efficiencies 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.
Cite this Research Publication : L. Xi, Tran, P. D., Chiam, S. Yang, Bassi, P. Saurabh, Mak, W. Fatt, Mulmudi, H. Kumar, Sudip Kumar Batabyal, Barber, J., Loo, J. Say Chye, and Wong, L. Helena, “Co3O4-decorated hematite nanorods as an effective photoanode for solar water oxidation”, The Journal of Physical Chemistry C, vol. 116, pp. 13884-13889, 2012.