Impact of TiO2-II phase stabilized in anatase matrix by high-pressure torsion on electrocatalytic hydrogen production

Kaveh Edalati, Qing Wang, Hiroto Eguchi, Hadi Razavi-Khosroshahi, Hoda Emami, Miho Yamauchi, Masayoshi Fuji, Zenji Horita

    研究成果: Contribution to journalArticle査読

    12 被引用数 (Scopus)

    抄録

    Electrocatalysis using renewable energy sources provides a clean technology to produce hydrogen from water. Titanium oxide is considered as a potential electrocatalyst not only for hydrogen production but also for CO2 conversion. In this study, to enhance the cathodic electrocatalytic activity of TiO2, the phase composition on TiO2 surface is modified by inclusion of high-pressure TiO2-II phase using high-pressure torsion (HPT) straining. Detailed spectroscopic studies revealed that the energy band gap is reduced and the valence band energy increased with increasing the TiO2-II fraction. The highest electrocatalytic activity for hydrogen production was achieved on an anatase-rich nanocomposite containing TiO2-II nanograins. IMPACT STATEMENT The first application of high-pressure TiO2-II phase for electrocatalysis confirm that the inclusion of phase in anatase-based nanocomposites is effective to enhance the electrocatalytic hydrogen production on titanium oxide due to the modification of electronic structure.

    本文言語英語
    ページ(範囲)334-339
    ページ数6
    ジャーナルMaterials Research Letters
    7
    8
    DOI
    出版ステータス出版済み - 2019

    All Science Journal Classification (ASJC) codes

    • 材料科学(全般)

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