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Issue 20, 2013
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Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

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Abstract

This work examines the effect of Zr4+ ions on the physical and photoelectrochemical (PEC) properties of hematite (α-Fe2O3) nanorod arrays grown in an aqueous solution containing zirconyl nitrate (ZrO(NO3)2) as a dopant precursor. The concentration of ZrO(NO3)2 in the precursor solution influenced both the film thickness and the Zr4+ concentration in the resulting films. Zr doping was found to enhance the photocurrent for water splitting; the highest photocurrent at 1.0 V vs. Ag/AgCl (0.33 mA cm−2) for the Zr-doped α-Fe2O3 film was approximately 7.2 times higher than that for the undoped film (0.045 mA cm−2). Additionally, the incident photon to current efficiency (IPCE) at 360 nm and 1.23 V vs. the reversible hydrogen electrode (RHE) increased from 3.8% to 13.6%. Ultrafast transient absorption spectroscopy suggests that Zr doping may influence PEC performance by reducing the rate of electron–hole recombination.

Graphical abstract: Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

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Publication details

The article was received on 24 Jun 2013, accepted on 28 Jul 2013 and first published on 01 Aug 2013


Article type: Paper
DOI: 10.1039/C3NR03245K
Citation: Nanoscale, 2013,5, 9867-9874
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    Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

    S. Shen, P. Guo, D. A. Wheeler, J. Jiang, S. A. Lindley, C. X. Kronawitter, J. Z. Zhang, L. Guo and S. S. Mao, Nanoscale, 2013, 5, 9867
    DOI: 10.1039/C3NR03245K

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