ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 21, 2025

Electrochemical water splitting under acidic conditions is an efficient route for green hydrogen production from renewable electricity. Its implementation on a globally relevant scale hindered by the lack of abundant and low-cost electrocatalysts oxygen evolution reaction that can operate stably efficiently highly anodic conditions. Here, we report design stable OER consisting self-healing bismuth (Bi)-based matrix hosting transition metal active sites. Comprehensive structural performance investigation Co- Ni-BiOx electrodes provides insights into role electrolyte composition pH in mechanism Our best-performing [Co-Bi]Ox [Ni-Bi]Ox anodes achieve over 200 h continuous electrolysis at catalytic current 10 mA cm-2 with overpotential 590 670 mV 1 0.1 M H2SO4 electrolyte. Notably, while [Bi]Ox did not contribute to activity, it was essential stabilize Co Ni sites during OER. findings provide promising strategy engineering earth-abundant materials splitting, as alternative use poorly scalable expensive noble catalysts.

Язык: Английский