Journal
NANO ENERGY
Volume 98, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107295
Keywords
Mg; seawater battery; Self-powered electrolysis; Hydrogen production; Seawater electrolysis system
Categories
Funding
- National Natural Science Foundation of China [22179067]
- Natural Science Foundation of Shan-dong Province [ZR2020MB025]
- Taishan Scholar Program of Shan-dong Province [ts201712046]
Ask authors/readers for more resources
Direct seawater electrolysis for hydrogen production has potential, but current systems require external power and cannot achieve continuous production. This study demonstrates a self-powered electrolysis system driven by a magnesium/seawater battery for continuous hydrogen production.
Direct seawater electrolysis to sustainable production of hydrogen fuel is attractive, given the abundant seawater resource on Earth. Nevertheless, current seawater electrolysis systems necessarily require external power grid to drive the electrolysis process, which are neither able to achieve continuous hydrogen production nor applicable to mobile and undersea apparatuses. Herein, we demonstrate a self-powered, direct seawater electrolysis system driven by Mg/seawater batteries for continuous hydrogen production. For a case study, a heterostructured MoNi/ NiMoO4 is prepared to catalyze the hydrogen evolution reaction (HER) at the cathodes of both the Mg/seawater battery and the seawater electrolysis, displaying a superior performance surpassing a commercial Pt/C with the overpotential as low as 256 mV at 10 mA cm-2 in seawater. The Mg/seawater battery achieves a peak power density of 21.08 mW cm-2, serving as a power source to drive seawater electrolysis. The self-powered system yields a total hydrogen evolution rate of 12.11 mL cm-2 h-1 and conversion efficiency of Mg-to-hydrogen up to 83.97%. Such a self-powered direct seawater electrolysis system provides an intriguing strategy for the continuous acquisition of hydrogen fuel from infinite seawater without any external power grids.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available