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

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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
Issue number17
Publication statusPublished - 2011 Apr 29


All Science Journal Classification (ASJC) codes

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

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