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Manipulating dehydrogenation kinetics through dual-doping Co3N electrode enables highly efficient hydrazine oxidation assisting self-powered H2 production

Author

Listed:
  • Yi Liu

    (University of Science and Technology of China)

  • Jihua Zhang

    (Guizhou Education University)

  • Yapeng Li

    (University of Science and Technology of China)

  • Qizhu Qian

    (University of Science and Technology of China)

  • Ziyun Li

    (University of Science and Technology of China)

  • Yin Zhu

    (University of Science and Technology of China)

  • Genqiang Zhang

    (University of Science and Technology of China)

Abstract

Replacing sluggish oxygen evolution reaction (OER) with hydrazine oxidation reaction (HzOR) to produce hydrogen has been considered as a more energy-efficient strategy than water splitting. However, the relatively high cell voltage in two-electrode system and the required external electric power hinder its scalable applications, especially in mobile devices. Herein, we report a bifunctional P, W co-doped Co3N nanowire array electrode with remarkable catalytic activity towards both HzOR (−55 mV at 10 mA cm−2) and hydrogen evolution reaction (HER, −41 mV at 10 mA cm−2). Inspiringly, a record low cell voltage of 28 mV is required to achieve 10 mA cm−2 in two-electrode system. DFT calculations decipher that the doping optimized H* adsorption/desorption and dehydrogenation kinetics could be the underlying mechanism. Importantly, a self-powered H2 production system by integrating a direct hydrazine fuel cell with a hydrazine splitting electrolyzer can achieve a decent rate of 1.25 mmol h−1 at room temperature.

Suggested Citation

  • Yi Liu & Jihua Zhang & Yapeng Li & Qizhu Qian & Ziyun Li & Yin Zhu & Genqiang Zhang, 2020. "Manipulating dehydrogenation kinetics through dual-doping Co3N electrode enables highly efficient hydrazine oxidation assisting self-powered H2 production," Nature Communications, Nature, vol. 11(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15563-8
    DOI: 10.1038/s41467-020-15563-8
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    Cited by:

    1. Zengyao Wang & Jiyi Chen & Erhong Song & Ning Wang & Juncai Dong & Xiang Zhang & Pulickel M. Ajayan & Wei Yao & Chenfeng Wang & Jianjun Liu & Jianfeng Shen & Mingxin Ye, 2021. "Manipulation on active electronic states of metastable phase β-NiMoO4 for large current density hydrogen evolution," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    2. Libo Zhu & Jian Huang & Ge Meng & Tiantian Wu & Chang Chen & Han Tian & Yafeng Chen & Fantao Kong & Ziwei Chang & Xiangzhi Cui & Jianlin Shi, 2023. "Active site recovery and N-N bond breakage during hydrazine oxidation boosting the electrochemical hydrogen production," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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