Recent progress in two-dimensional oxide photocatalysts for water splitting

Shintaro Ida, Tatsumi Ishihara

    Research output: Contribution to journalArticlepeer-review

    189 Citations (Scopus)


    This Perspective focuses on the photocatalytic activity of two-dimensional (2D) oxide and nitrogen-doped oxide crystals and the effective use of 2D photocatalysts for understanding the mechanism of the water splitting reaction. Strategies for improving the activities of 2D photocatalysts are slightly different from those of bulk photocatalysts. Although it is well-known that a photocatalyst without co-catalyst loading has low activity for hydrogen production from water, a certain type of 2D oxide nanosheet shows high activity without co-catalyst loading. It is difficult to determine what factors contribute to this separation of oxidation and reduction sites of water because there are many factors on the reaction surface. A nanosheet p-n junction surface is an ideal surface for understanding the carrier transfer during the photocatalytic reaction. In this system, the driving force of the carrier transfer to the reaction sites was found to be the potential gradient generated by the nanosheet junction.

    Original languageEnglish
    Pages (from-to)2533-2542
    Number of pages10
    JournalJournal of Physical Chemistry Letters
    Issue number15
    Publication statusPublished - Aug 7 2014

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Physical and Theoretical Chemistry


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