Achievement of High Photocatalytic Performance to BaTi4O9 Toward Overall H2O Splitting

Yuichi Hiramachi, Hirotaka Fujimori, Akira Yamakata, Yoshihisa Sakata

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The improvement of photocatalytic activity of BaTi4O9 to overall H2O splitting was investigated. From the evaluation of co-catalysts, Rh0.7Cr1.3O3 was preferable. However, this co-catalyst was degrading with the progress of the photocatalytic reaction. When CoOx was co-loaded as the co-catalyst for O2 evolution reaction over the surface, the steady progress of the photocatalytic reaction can be confirmed. Here, effective way and condition for loading CoOx co-catalyst as well as effective preparation method of BaTi4O9 were demonstrated in order to improve the photocatalytic activity of BaTi4O9 with Rh0.7Cr1.3O3 and CoOx co-catalysts to the overall H2O splitting. As the results, the photocatalyst prepared by preferable method and condition showed high photocatalytic activity to the overall H2O splitting, where the apparent quantum yield (AQY) at 313 nm reached to 41 %.

Original languageEnglish
Pages (from-to)6213-6217
Number of pages5
Issue number24
Publication statusPublished - Dec 18 2019
Externally publishedYes


  • BaTiO
  • CoO co-catalyst
  • Overall HO splitting
  • Photocatalyst
  • Photocatalytic activity

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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