Efficient osmosis-powered production of green hydrogen

Qirui Liang, Yanan Huang, Yaxin Guo, Xin Zhang, Xiaomeng Hu, Hui Zeng, Kang Liang, Dongyuan Zhao, Lei Jiang and Biao Kong ()
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Qirui Liang: Fudan University
Yanan Huang: Fudan University
Yaxin Guo: Fudan University
Xin Zhang: Fudan University
Xiaomeng Hu: Fudan University
Hui Zeng: Fudan University
Kang Liang: The University of New South Wales
Dongyuan Zhao: Fudan University
Lei Jiang: Chinese Academy of Sciences
Biao Kong: Fudan University

Nature Sustainability, 2024, vol. 7, issue 5, 628-639

Abstract: Abstract Hydrogen, a clean energy carrier, has emerged as a promising solution to decarbonize the power sector and move towards a more sustainable future. However, the heavy dependence of its production on fossil fuels highlights the pressing need to prioritize the acquisition of green hydrogen from renewable sources, ideally without any additional energy input. Here we utilize the osmotic energy between seawater and freshwater to generate hydrogen directly. With a tandem of high-performance ion exchange membrane and electrocatalytic electrode, our design serves to harvest osmotic energy and drive hydrogen production. Notably, the integrated device demonstrates a consistent alkaline hydrogen evolution rate exceeding 300 l m−2 h−1 for more than 12 days under the artificial salinity gradient. Our study presents a viable pathway for hydrogen production through renewable sources.

Date: 2024
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DOI: 10.1038/s41893-024-01317-7

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