Effectiveness of strain and dopants on breaking the activity-stability trade-off of RuO₂ acidic oxygen evolution electrocatalysts.

ABSTRACT: Ruthenium dioxide electrocatalysts for acidic oxygen evolution reaction suffer from mediocre activity and rather instability induced by high ruthenium-oxygen covalency. Here, the tensile strained strontium and tantalum codoped ruthenium dioxide nanocatalysts are synthesized via a molten salt-assisted quenching strategy. The tensile strained spacially elongates the ruthenium-oxygen bond and reduces covalency, thereby inhibiting the lattice oxygen participation and structural decomposition. The synergistic electronic modulations among strontium-tantalum-ruthenium groups both optimize deprotonation on oxygen sites and intermediates absorption on ruthenium sites, lowering the reaction energy barrier. Those result in a well-balanced activity-stability profile, confirmed by comprehensive experim

SUBMITTER: Liu Y 

PROVIDER: S-EPMC11832934 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature