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Cobalt phosphate-modified barium-doped tantalum nitride nanorod photoanode with 1.5% solar energy conversion efficiency

Author

Listed:
  • Yanbo Li

    (The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku)

  • Li Zhang

    (The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku)

  • Almudena Torres-Pardo

    (Facultad de Químicas, Universidad Complutense)

  • Jose M. González-Calbet

    (Facultad de Químicas, Universidad Complutense)

  • Yanhang Ma

    (Stockholm University)

  • Peter Oleynikov

    (Stockholm University)

  • Osamu Terasaki

    (Stockholm University
    Graduate School of EEWS, WCU, KAIST)

  • Shunsuke Asahina

    (SM Application Group, JEOL Ltd., 1-2 Musashino 3-Chome Akisima)

  • Masahide Shima

    (SM Application Group, JEOL Ltd., 1-2 Musashino 3-Chome Akisima)

  • Dongkyu Cha

    (KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST))

  • Lan Zhao

    (KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST))

  • Kazuhiro Takanabe

    (KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST))

  • Jun Kubota

    (The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku)

  • Kazunari Domen

    (The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku)

Abstract

Spurred by the decreased availability of fossil fuels and global warming, the idea of converting solar energy into clean fuels has been widely recognized. Hydrogen produced by photoelectrochemical water splitting using sunlight could provide a carbon dioxide lean fuel as an alternative to fossil fuels. A major challenge in photoelectrochemical water splitting is to develop an efficient photoanode that can stably oxidize water into oxygen. Here we report an efficient and stable photoanode that couples an active barium-doped tantalum nitride nanostructure with a stable cobalt phosphate co-catalyst. The effect of barium doping on the photoelectrochemical activity of the photoanode is investigated. The photoanode yields a maximum solar energy conversion efficiency of 1.5%, which is more than three times higher than that of state-of-the-art single-photon photoanodes. Further, stoichiometric oxygen and hydrogen are stably produced on the photoanode and the counter electrode with Faraday efficiency of almost unity for 100 min.

Suggested Citation

  • Yanbo Li & Li Zhang & Almudena Torres-Pardo & Jose M. González-Calbet & Yanhang Ma & Peter Oleynikov & Osamu Terasaki & Shunsuke Asahina & Masahide Shima & Dongkyu Cha & Lan Zhao & Kazuhiro Takanabe &, 2013. "Cobalt phosphate-modified barium-doped tantalum nitride nanorod photoanode with 1.5% solar energy conversion efficiency," Nature Communications, Nature, vol. 4(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3566
    DOI: 10.1038/ncomms3566
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    Cited by:

    1. Yequan Xiao & Zeyu Fan & Mamiko Nakabayashi & Qiaoqiao Li & Liujiang Zhou & Qian Wang & Changli Li & Naoya Shibata & Kazunari Domen & Yanbo Li, 2022. "Decoupling light absorption and carrier transport via heterogeneous doping in Ta3N5 thin film photoanode," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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