Boosting the durability of RuO₂ via confinement effect for proton exchange membrane water electrolyzer.

ABSTRACT: Ruthenium dioxide has attracted extensive attention as a promising catalyst for oxygen evolution reaction in acid. However, the over-oxidation of RuO₂ into soluble H₂RuO₅ species results in a poor durability, which hinders the practical application of RuO₂ in proton exchange membrane water electrolysis. Here, we report a confinement strategy by enriching a high local concentration of in-situ formed H₂RuO₅ species, which can effectively suppress the RuO₂ degradation by shifting the redox equilibrium away from the RuO₂ over-oxidation, greatly boosting its durability during acidic oxygen evolution. Therefore, the confined RuO₂ catalyst can continuously operate at 10 mA cm^-2 for over 4

SUBMITTER: Zheng WX 

PROVIDER: S-EPMC11695614 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature