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Separating hydrogen and oxygen evolution in alkaline water electrolysis using nickel hydroxide

Author

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  • Long Chen

    (Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University)

  • Xiaoli Dong

    (Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University)

  • Yonggang Wang

    (Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University)

  • Yongyao Xia

    (Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University)

Abstract

Low-cost alkaline water electrolysis has been considered a sustainable approach to producing hydrogen using renewable energy inputs, but preventing hydrogen/oxygen mixing and efficiently using the instable renewable energy are challenging. Here, using nickel hydroxide as a redox mediator, we decouple the hydrogen and oxygen production in alkaline water electrolysis, which overcomes the gas-mixing issue and may increase the use of renewable energy. In this architecture, the hydrogen production occurs at the cathode by water reduction, and the anodic Ni(OH)2 is simultaneously oxidized into NiOOH. The subsequent oxygen production involves a cathodic NiOOH reduction (NiOOH→Ni(OH)2) and an anodic OH− oxidization. Alternatively, the NiOOH formed during hydrogen production can be coupled with a zinc anode to form a NiOOH-Zn battery, and its discharge product (that is, Ni(OH)2) can be used to produce hydrogen again. This architecture brings a potential solution to facilitate renewables-to-hydrogen conversion.

Suggested Citation

  • Long Chen & Xiaoli Dong & Yonggang Wang & Yongyao Xia, 2016. "Separating hydrogen and oxygen evolution in alkaline water electrolysis using nickel hydroxide," Nature Communications, Nature, vol. 7(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11741
    DOI: 10.1038/ncomms11741
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    Cited by:

    1. Yang, Wei & Bao, Jingjing & Liu, Hongtao & Zhang, Jun & Guo, Lin, 2023. "Low-grade heat to hydrogen: Current technologies, challenges and prospective," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).
    2. Rousseau, Raphaël & Etcheverry, Luc & Roubaud, Emma & Basséguy, Régine & Délia, Marie-Line & Bergel, Alain, 2020. "Microbial electrolysis cell (MEC): Strengths, weaknesses and research needs from electrochemical engineering standpoint," Applied Energy, Elsevier, vol. 257(C).
    3. Zhao, Meng-Jie & He, Qian & Xiang, Ting & Ya, Hua-Qin & Luo, Hao & Wan, Shanhong & Ding, Jun & He, Jian-Bo, 2023. "Automatic operation of decoupled water electrolysis based on bipolar electrode," Renewable Energy, Elsevier, vol. 203(C), pages 583-591.
    4. Yousef Al-Abdallat & Inshad Jumah & Rami Jumah & Hanadi Ghanem & Ahmad Telfah, 2020. "Catalytic Electrochemical Water Splitting Using Boron Doped Diamond (BDD) Electrodes as a Promising Energy Resource and Storage Solution," Energies, MDPI, vol. 13(20), pages 1-15, October.
    5. De Silva, Y. Sanath K. & Middleton, Peter Hugh & Kolhe, Mohan Lal, 2020. "Performance comparison of mono-polar and bi-polar configurations of alkaline electrolysis stack through 3-D modelling and experimental fabrication," Renewable Energy, Elsevier, vol. 149(C), pages 760-772.
    6. Fei Lv & Jiazhe Wu & Xuan Liu & Zhihao Zheng & Lixia Pan & Xuewen Zheng & Liejin Guo & Yubin Chen, 2024. "Decoupled electrolysis for hydrogen production and hydrazine oxidation via high-capacity and stable pre-protonated vanadium hexacyanoferrate," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    7. Pooja Dange & Soumya Pandit & Dipak Jadhav & Poojhaa Shanmugam & Piyush Kumar Gupta & Sanjay Kumar & Manu Kumar & Yung-Hun Yang & Shashi Kant Bhatia, 2021. "Recent Developments in Microbial Electrolysis Cell-Based Biohydrogen Production Utilizing Wastewater as a Feedstock," Sustainability, MDPI, vol. 13(16), pages 1-37, August.
    8. Wang, Ligang & Pérez-Fortes, Mar & Madi, Hossein & Diethelm, Stefan & herle, Jan Van & Maréchal, François, 2018. "Optimal design of solid-oxide electrolyzer based power-to-methane systems: A comprehensive comparison between steam electrolysis and co-electrolysis," Applied Energy, Elsevier, vol. 211(C), pages 1060-1079.

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