Cerium regulating Ru–O covalency enhances the RuO2 acidic oxygen evolution reaction

Ruthenium-based catalysts suffer from poor stability owing to the soluble high-valent Ru species. This study proposes a Ce doping strategy to modulate the Ru-O covalency, enhancing its activity and stability. This discovery presents a new perspective for enhancing the catalytic performance of RuO₂-based catalysts in acidic electrolytes.