Hydrogen plasma reduced black [Formula presented] nanowires for enhanced photoelectrochemical water-splitting

Zhangliu Tian, Huolei Cui, Guilian Zhu, Wenli Zhao, Ji Jian Xu, Feng Shao, Jianqiao He, Fuqiang Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


Black TiO2 with various nanostructures and phase constitutions have been reported to exhibit excellent photocatalytic and photoelectrochemical (PEC) performance. Here, we report the fabrication of black nanostructured TiO2[Formula presented] through hydrogen plasma assisted reduction and its enhanced PEC properties for the first time. Both the obtained TiO2[Formula presented] and black TiO2[Formula presented] are single crystalline nanowires, while the black TiO2[Formula presented] samples exhibit much stronger visible and infrared light absorption. The optimal black TiO2[Formula presented] sample obtained by hydrogen plasma treatment at 425 °C yields a photocurrent density of 0.85 mA cm−2, a rather low onset potential of −0.937 VAg/AgCl and a high applied bias photon-to-current efficiency (ABPE) of 0.363%, which is far superior to the TiO2[Formula presented] (0.15 mA cm−2 photocurrent, −0.917 VAg/AgCl onset potential and 0.138% ABPE). The significantly enhanced PEC performance of the black TiO2[Formula presented] is ascribed to the introduction of moderate surface oxygen vacancies. These results indicate that the black TiO2[Formula presented] is a promising material for PEC application and solar energy utilization.

Original languageEnglish (US)
Pages (from-to)697-705
Number of pages9
JournalJournal of Power Sources
StatePublished - Sep 1 2016


  • Black TiO[Formula presented]
  • Hydrogen plasma
  • Oxygen vacancies
  • Photocurrent density
  • Photoelectrochemical performance

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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