Editors have highlighted the following attributes while ensuring the content's credibility:Schematic showing cathode oxidation and corrosion under start–shutdown water/seawater electrolysis cycles. The benefit of the study, which has been published in Nature, is that the findings point toward making (sea)water electrolysis scalable and practical. The self-healing cathode addresses a key reactor engineering challenge: maintaining electrolyzer stability under intermittent conditions, i.e., when the sun doesn't shine or the wind drops. This advancement mitigates electrode degradation issues in anion exchange membranes and alkaline electrolyzers when coupled with fluctuating renewable energy sources. More information: Qihao Sha et al, 10,000-h-stable intermittent alkaline seawater electrolysis, Nature (2025).