Promising cobalt oxide and cobalt oxide/silver photocathodes for photoelectrochemical water splitting

Zhifeng Liu*, Chonghao Ma, Qijun Cai, Tiantian Hong, Keying Guo, Lu Yan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


In this paper, novel promising photoelectrochemical electrodes of CoO nanowires and cocatalyst (Ag) modified CoO nanowires are prepared and studied in photoelectrochemical water splitting exhibiting an efficient photoelectrochemical activity for the first time. Detailed growth mechanisms for CoO nanowires and CoO/Ag nanowires are discussed. The effect of Ag is investigated. The enhanced absorption spectrum and photoelectrochemical performance are characterized. The photocurrent density of CoO/Ag nanowires reaches −1.10 mA cm−2 due to a high efficiency of light-harvesting, the high holes mobility via the direct pathways and increased interfacial electrons transfer of Ag nanoparticles. Such CoO-based catalysts may lead to effective photoelectrochemical activity and can be promising building blocks in photoelectrochemical water splitting systems.

Original languageEnglish
Pages (from-to)46-51
Number of pages6
JournalSolar Energy Materials and Solar Cells
StatePublished - 1 Mar 2017
Externally publishedYes


  • Cobalt oxide
  • Cocatalyst
  • Nanowires
  • Photoelectrochemical
  • Water splitting


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