Fabrication of TiO 2/tin-doped indium oxide-based photoelectrode coated with overlayer materials and its photoelectrochemical behavior

Sangbaek Park, Sangwook Lee, Donghoe Kim, Chan Woo Lee, In Sun Cho, Kug Sun Hong

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The photoelectrochemical properties of TiO 2-based photoelectrodes with metal oxide overlayers (e.g., ZnO, ZrO 2, MgO, and Al 2O 3 were investigated. The metal oxides were deposited on TiO 2/tindoped indium oxide (ITO) films by spin-coating metal-alkoxide precursors. The formation of the overlayers was confirmed by energy dispersive X-ray spectroscopy (EDS) and high resolution transmission electron microscopy (HRTEM). Each overlayers were well-coated on the TiO 2-based films and have approximately 2 nm thickness. The prepared films were used as photoanodes in a photoelectrochemical system with a Pt counter electrode to evaluate hydrogen production performance. Comparing with other overlayers, the ZnO-coated photoelectrode exhibits the highest rate of hydrogen evolution and which is better than the uncoated one. From the photoelectrochemical and spectroscopic study, the superior hydrogen production property of the ZnO-coated TiO 2 photoelectrode was attributed to both the higher light absorbance of ZnO compared to TiO 2 and the formation of hydroxyl groups at the ZnO surface.

Original languageEnglish
Pages (from-to)1390-1394
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number2
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Hydrogen
  • Overlayer
  • Photoelectrochemical Property
  • TiO
  • ZnO

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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