Photoelectrochemical hydrogen production from water using p-type CaFe 2O4and n-type ZnO

Shintaro Ida, Keisuke Yamada, Takuya Matsunaga, Hidehisa Hagiwara, Tatsumi Ishihara, Takaaki Taniguchi, Michio Koinuma, Yasumichi Matsumoto

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    CaFe2O4 (p-type) and ZnO (n-type) electrodes were prepared for photoelectrochemical hydrogen production from water. The CaFe 2O4 electrode showed photo-reduction current in 0.1 M NaOH aqueous solution at potentials more negative than + 0.31 V vs. Ag/AgCl, while ZnO showed photo-oxidation at potentials more positive than - 0.71 V vs. Ag/AgCl. Connecting the both electrodes under UV-light illumination, the open-circuit voltage between the electrodes was 0.82 V, and hydrogen gas was generated from the side of the CaFe2O4 electrode without applying an external voltage. The gas generation continued for 4 days at least. In addition, the hydrogen was generated even under a reverse bias ( - 0.1 V) vs. CaFe2O4 electrode.

    Original languageEnglish
    Pages (from-to)797-800
    Number of pages4
    JournalElectrochemistry
    Volume79
    Issue number10
    DOIs
    Publication statusPublished - Oct 2011

    All Science Journal Classification (ASJC) codes

    • Electrochemistry

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