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Gallium nitride nanowire as a linker of molybdenum sulfides and silicon for photoelectrocatalytic water splitting

Author

Listed:
  • Baowen Zhou

    (McGill University)

  • Xianghua Kong

    (McGill University)

  • Srinivas Vanka

    (McGill University)

  • Sheng Chu

    (McGill University)

  • Pegah Ghamari

    (McGill University)

  • Yichen Wang

    (McGill University)

  • Nick Pant

    (McGill University)

  • Ishiang Shih

    (McGill University)

  • Hong Guo

    (McGill University)

  • Zetian Mi

    (McGill University
    University of Michigan)

Abstract

The combination of earth-abundant catalysts and semiconductors, for example, molybdenum sulfides and planar silicon, presents a promising avenue for the large-scale conversion of solar energy to hydrogen. The inferior interface between molybdenum sulfides and planar silicon, however, severely suppresses charge carrier extraction, thus limiting the performance. Here, we demonstrate that defect-free gallium nitride nanowire is ideally used as a linker of planar silicon and molybdenum sulfides to produce a high-quality shell-core heterostructure. Theoretical calculations revealed that the unique electronic interaction and the excellent geometric-matching structure between gallium nitride and molybdenum sulfides enabled an ideal electron-migration channel for high charge carrier extraction efficiency, leading to outstanding performance. A benchmarking current density of 40 ± 1 mA cm−2 at 0 V vs. reversible hydrogen electrode, the highest value ever reported for a planar silicon electrode without noble metals, and a large onset potential of +0.4 V were achieved under standard one-sun illumination.

Suggested Citation

  • Baowen Zhou & Xianghua Kong & Srinivas Vanka & Sheng Chu & Pegah Ghamari & Yichen Wang & Nick Pant & Ishiang Shih & Hong Guo & Zetian Mi, 2018. "Gallium nitride nanowire as a linker of molybdenum sulfides and silicon for photoelectrocatalytic water splitting," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06140-1
    DOI: 10.1038/s41467-018-06140-1
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    Cited by:

    1. Xiaowei Guo & Erhong Song & Wei Zhao & Shumao Xu & Wenli Zhao & Yongjiu Lei & Yuqiang Fang & Jianjun Liu & Fuqiang Huang, 2022. "Charge self-regulation in 1T'''-MoS2 structure with rich S vacancies for enhanced hydrogen evolution activity," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Wan Jae Dong & Yixin Xiao & Ke R. Yang & Zhengwei Ye & Peng Zhou & Ishtiaque Ahmed Navid & Victor S. Batista & Zetian Mi, 2023. "Pt nanoclusters on GaN nanowires for solar-asssisted seawater hydrogen evolution," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. Sang Eon Jun & Youn-Hye Kim & Jaehyun Kim & Woo Seok Cheon & Sungkyun Choi & Jinwook Yang & Hoonkee Park & Hyungsoo Lee & Sun Hwa Park & Ki Chang Kwon & Jooho Moon & Soo-Hyun Kim & Ho Won Jang, 2023. "Atomically dispersed iridium catalysts on silicon photoanode for efficient photoelectrochemical water splitting," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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