Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

Shaohua Shen; Penghui Guo; Damon A. Wheeler; Jiangang Jiang; Sarah A. Lindley; Coleman X. Kronawitter; Jin Z. Zhang; Liejin Guo; Samuel S. Mao

doi:10.1039/c3nr03245k

Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

Shaohua Shen, Penghui Guo, Damon A. Wheeler, Jiangang Jiang, Sarah A. Lindley, Coleman X. Kronawitter, Jin Z. Zhang, Liejin Guo, Samuel S. Mao

Mechanical & Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

104 Scopus citations

Abstract

This work examines the effect of Zr⁴⁺ ions on the physical and photoelectrochemical (PEC) properties of hematite (α-Fe₂O ₃) 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.

Original language	British English
Pages (from-to)	9867-9874
Number of pages	8
Journal	Nanoscale
Volume	5
Issue number	20
DOIs	https://doi.org/10.1039/c3nr03245k
State	Published - 21 Oct 2013

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@article{92fa382b686744aba5f600b3e28f1145,

title = "Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays",

abstract = "This work examines the effect of Zr4+ ions on the physical and photoelectrochemical (PEC) properties of hematite (α-Fe2O 3) 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.",

author = "Shaohua Shen and Penghui Guo and Wheeler, {Damon A.} and Jiangang Jiang and Lindley, {Sarah A.} and Kronawitter, {Coleman X.} and Zhang, {Jin Z.} and Liejin Guo and Mao, {Samuel S.}",

year = "2013",

month = oct,

day = "21",

doi = "10.1039/c3nr03245k",

language = "British English",

volume = "5",

pages = "9867--9874",

journal = "Nanoscale",

issn = "2040-3364",

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T1 - Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

AU - Shen, Shaohua

AU - Guo, Penghui

AU - Wheeler, Damon A.

AU - Jiang, Jiangang

AU - Lindley, Sarah A.

AU - Kronawitter, Coleman X.

AU - Zhang, Jin Z.

AU - Guo, Liejin

AU - Mao, Samuel S.

PY - 2013/10/21

Y1 - 2013/10/21

N2 - This work examines the effect of Zr4+ ions on the physical and photoelectrochemical (PEC) properties of hematite (α-Fe2O 3) 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.

AB - This work examines the effect of Zr4+ ions on the physical and photoelectrochemical (PEC) properties of hematite (α-Fe2O 3) 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.

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U2 - 10.1039/c3nr03245k

DO - 10.1039/c3nr03245k

M3 - Article

AN - SCOPUS:84884851884

SN - 2040-3364

VL - 5

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EP - 9874

JO - Nanoscale

JF - Nanoscale

IS - 20

ER -

Physical and photoelectrochemical properties of Zr-doped hematite nanorod arrays

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