Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 16, 2025

Abstract Elevating iron‐involved sites in NiFe (oxy)hydroxides significantly accelerates oxygen evolution reaction (OER) kinetics but often sacrifices stability due to extensive metal ablation during industrial electrolysis. Here, an ions migration‐induced stabilization strategy is introduced explore robust catalysts for OER. The present approach involving cathodic polarization of Fe‐rich NiFe‐layered double hydroxides (LDH) facilitates selective substitution Ni with Fe cations and deep oxyanions OH ‐ , leading decreased layer thickness, enriched sites, aggravated lattice distortion reorganized NiFe‐LDH (R‐NiFe‐LDH). Correspondingly, R‐NiFe‐LDH fully transforms into γ‐(NiFe)OOH retained nanosheet morphology, reduced distortions, dramatically inhibited dissolution prolonged It achieves exceptional durability at 500 mA cm −2 retaining ≈90% over 5 days, substantially outperforming pristine (50% loss). Over 2 months, delivers only a 70 mV overpotential increase, whereas decays by 140 just 75 h. An anion exchange membrane water electrolyzer applying as both electrodes exhibit zero decay 1000 100 h, compared rate 3.6 h −1 the counterpart. This work showcases straightforward engineering atomic arrangements toward

Язык: Английский