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

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

Renewable Energy, 2022, vol. 195, issue C, 230-237

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.

Keywords: Water splitting; Solar thermoelectric generator; Photothermal conversion; Electrocatalyst; FeS (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:195:y:2022:i:c:p:230-237

DOI: 10.1016/j.renene.2022.06.003

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