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One stone, two birds: Multifunctional hierarchical iron sulfide nanosheet arrays enabling self-powered solar thermoelectric water electrolysis

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  • Jiang, Jing
  • Chen, Mei
  • Luo, Yang
  • Xu, Ying
  • Ai, Lunhong

Abstract

Solar water splitting is essential for future sustainable hydrogen production using renewable resources, but it remains challenging due to expensive solar generators and inefficient electrocatalysts. Herein, we propose a solar thermoelectric water electrolysis system using multifunctional iron foam-supported iron sulfide nanosheet arrays (FeS/IF) as the photothermal conversion unit in solar thermoelectric generator (STEG) and electroactive electrode in water electrolysis. The photothermal FeS/IF rapidly converts solar light to localized heat, supplying the desirable temperature difference for thermoelectric power generation. Meanwhile, the FeS/IF acts as a bifunctional electrode to effectively catalyze the hydrogen and oxygen evolution reactions in alkaline media. As a prototype integrated system, four series-connected FeS/IF-STEG are applied to self-power water splitting with the production rate of 10.7 and 5.3 μmol h−1 for hydrogen and oxygen, respectively. The present study offers new opportunities for rational design of integrated energy systems from renewable solar to sustainable hydrogen.

Suggested Citation

  • Jiang, Jing & Chen, Mei & Luo, Yang & Xu, Ying & Ai, Lunhong, 2022. "One stone, two birds: Multifunctional hierarchical iron sulfide nanosheet arrays enabling self-powered solar thermoelectric water electrolysis," Renewable Energy, Elsevier, vol. 195(C), pages 230-237.
    • Handle: RePEc:eee:renene:v:195:y:2022:i:c:p:230-237
    DOI: 10.1016/j.renene.2022.06.003
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    References listed on IDEAS

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    1. Jieyang Jia & Linsey C. Seitz & Jesse D. Benck & Yijie Huo & Yusi Chen & Jia Wei Desmond Ng & Taner Bilir & James S. Harris & Thomas F. Jaramillo, 2016. "Solar water splitting by photovoltaic-electrolysis with a solar-to-hydrogen efficiency over 30%," Nature Communications, Nature, vol. 7(1), pages 1-6, December.
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    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).

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