Controlled growth of vertically oriented hematite/Pt composite nanorod arrays: Use for photoelectrochemical water splitting

Aiming Mao, Nam Gyu Park, Gui Young Han, Jong Hyeok Park

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Highly ordered and vertically grown Pt-doped α-Fe2O 3 nanorod arrays on a gold substrate were successfully prepared by the electrochemical co-deposition method using an anodized aluminum oxide template. The effect of the Pt doping in α-Fe2O3 nanorod arrays on their water splitting ability was investigated for the first time. The elemental maps obtained by energy dispersive spectroscopy showed that the Pt was uniformly dispersed in the α-Fe2O3 nanorod arrays. The photoelectrochemical properties of the α-Fe 2O3/Pt composite nanorod arrays as a function of the Pt content were studied by measuring their photocurrent-potential behavior in 1M NaOH electrolyte under AM 1.5 100mWcm-2 illumination. The Pt-doped α-Fe2O3 nanorod arrays show an improvement in solar-to-hydrogen conversion efficiency (∼5%) for photoelectrochemical water splitting compared to undoped samples. To the best of our knowledge, it is the highest value yet obtained from α-Fe2O3.

Original languageEnglish
Article number175703
JournalNanotechnology
Volume22
Issue number17
DOIs
Publication statusPublished - 2011 Apr 29

Fingerprint

Hematite
Nanorods
Water
Composite materials
Aluminum Oxide
Photocurrents
Gold
Electrolytes
Conversion efficiency
Energy dispersive spectroscopy
Hydrogen
Lighting
Doping (additives)
ferric oxide
Aluminum
Oxides
Substrates

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

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abstract = "Highly ordered and vertically grown Pt-doped α-Fe2O 3 nanorod arrays on a gold substrate were successfully prepared by the electrochemical co-deposition method using an anodized aluminum oxide template. The effect of the Pt doping in α-Fe2O3 nanorod arrays on their water splitting ability was investigated for the first time. The elemental maps obtained by energy dispersive spectroscopy showed that the Pt was uniformly dispersed in the α-Fe2O3 nanorod arrays. The photoelectrochemical properties of the α-Fe 2O3/Pt composite nanorod arrays as a function of the Pt content were studied by measuring their photocurrent-potential behavior in 1M NaOH electrolyte under AM 1.5 100mWcm-2 illumination. The Pt-doped α-Fe2O3 nanorod arrays show an improvement in solar-to-hydrogen conversion efficiency (∼5{\%}) for photoelectrochemical water splitting compared to undoped samples. To the best of our knowledge, it is the highest value yet obtained from α-Fe2O3.",
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Controlled growth of vertically oriented hematite/Pt composite nanorod arrays : Use for photoelectrochemical water splitting. / Mao, Aiming; Park, Nam Gyu; Han, Gui Young; Park, Jong Hyeok.

In: Nanotechnology, Vol. 22, No. 17, 175703, 29.04.2011.

Research output: Contribution to journalArticle

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AU - Han, Gui Young

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