Substrate-Adaptive Sacrificial Corrosion Strategy Enables 700 mV Oxygen Evolution Window for Chloride-Resistant Seawater Electrolysis

Substrate-Adaptive Sacrificial Corrosion Strategy Enables 700 mV Oxygen Evolution Window for Chloride-Resistant Seawater Electrolysis | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Substrate-Adaptive Sacrificial Corrosion Strategy Enables 700 mV Oxygen Evolution Window for Chloride-Resistant Seawater Electrolysis Yipu Liu, Xu Zhang, Li Tong, Quanbin Huang, Xiao Liang, Xiahui Shi, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6646407/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 13 Dec, 2025 Read the published version in Nature Communications → Version 1 posted You are reading this latest preprint version Abstract Seawater electrolysis for hydrogen generation offers a sustainable solution to the energy crisis and freshwater scarcity, holding significant importance for the green hydrogen industry. The primary challenges in seawater electrolysis lie in the efficiency reduction and stability attenuation caused by the presence of Cl − species in seawater. In this work, we propose a substrate-adaptive sacrificial corrosion strategy to universally synthesize highly active nickel-iron layered double hydroxide (NiFe-LDH) nanoarrays on diverse conductive substrates including carbon cloth and Ti mesh. The optimized electrode achieves an ultralow overpotential of 182 mV at 10 mA/cm 2 , sustains 500 mA/cm 2 for 1000 h in 10 m KOH seawater, and retains performance after 3.5-year coastal storage. A quantitative protocol uncovers a 700 mV OER-only potential window ( vs. 480 mV for IrO 2 ), attributed to oxygen vacancy-rich NiFeOOH active phase where Fe sites enhance OH* adsorption (0.19 eV overpotential) and Ni sites suppress Cl* interaction. This work provides a scalable synthesis platform and mechanistic insights for designing industrial seawater electrolyzers with extended durability and selectivity. Physical sciences/Materials science/Materials for energy and catalysis/Electrocatalysis Physical sciences/Energy science and technology/Renewable energy/Hydrogen energy seawater electrolysis oxygen evolution reaction corrosion engineering NiFe-LDH chlorine evolution reaction Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SIACCE250512liuyp2.pdf Cite Share Download PDF Status: Published Journal Publication published 13 Dec, 2025 Read the published version in Nature Communications → Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6646407","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":460181104,"identity":"9b2bae08-5112-45bc-b855-229b86ebd2ec","order_by":0,"name":"Yipu 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The primary challenges in seawater electrolysis lie in the efficiency reduction and stability attenuation caused by the presence of Cl\u003csup\u003e\u0026minus;\u003c/sup\u003e species in seawater. In this work, we propose a substrate-adaptive sacrificial corrosion strategy to universally synthesize highly active nickel-iron layered double hydroxide (NiFe-LDH) nanoarrays on diverse conductive substrates including carbon cloth and Ti mesh. The optimized electrode achieves an ultralow overpotential of 182 mV at 10 mA/cm\u003csup\u003e2\u003c/sup\u003e, sustains 500 mA/cm\u003csup\u003e2\u003c/sup\u003e for 1000 h in 10 \u003cspan type=\"SmallCaps\" class=\"SmallCaps\" name=\"Emphasis\"\u003em\u003c/span\u003e KOH seawater, and retains performance after 3.5-year coastal storage. 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