Authors
Rongli Fan, Gaoxiang He, Minyue Zhao, Huihui Yan, Bin Gao, Zhonghua Li, Huiting Huang, Xizhang Wang, Weichang Hao, Jianyong Feng, Zhigang Zou, Zhaosheng Li
Published in
Advanced materials (Deerfield Beach, Fla.). Pages e74631. Aug 19, 2026. Epub Aug 19, 2026.
Abstract
Direct seawater electrolysis powered by renewable electricity offers a promising avenue for sustainable production of green hydrogen, yet the challenges of chloride-induced corrosion and sluggish kinetics of oxygen evolution reaction (OER) persist with electrocatalysts. Here, a sulfur-modified CoFe-layered double hydroxide catalyst (S-CF·nH2O) is developed to address the above activity and stability issues, in which sulfur etching-assisted targeted reconstruction occurs and yields high-density accessible active sites both on the surface and in the interlayer galleries; meanwhile, sulfate ions derived from sulfur oxidation adsorb on catalyst and create an electrostatic Cl--repelling barrier. Featuring interlayer space as a supplementary reaction region and an electrostatic-protecting sulfate layer, S-CF·nH2O catalyst achieves exceptional OER activity (with an overpotential of 370 mV at 1 A cm-2) and unprecedented durability exceeding 12 000 h in alkaline seawater; the seawater electrolyzer assembled from S-CF·nH2O also demonstrates stable operation for 10 000 h at 600 mA cm-2. In situ spectroscopic and isotope tracing analyses reveal a distinct oxide pathway mechanism with the interlayer water, in contrast to the adsorbate evolution mechanism occurring at the catalyst outer surface. This work conceptually reveals the robustness of interlayer chemistry for the design of high-performance LDH-based catalysts.
PMID:
42619399
Bibliographic data and abstract were imported from PubMed on 20 Aug 2026.
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