Ultrathin RuRh@(RuRh)O2 core@shell nanosheets as stable oxygen evolution electrocatalysts

Abstract

We report a novel architecture of ultrathin RuRh@(RuRh)O₂ core/shell nanosheets with a core of ultrathin metallic RuRh nanosheets and a shell of (RuRh)O₂ oxides as a superb electrocatalyst toward the oxgen evolution reaction (OER), better than most of the state-of-the-art Ru-based or Ir-based electrocatalysts. Moreover, the RuRh@(RuRh)O₂ core/shell nanosheets exhibit good durability because the (RuRh)O₂ oxide shell protects the normally labile RuRh NS core against dissolution during the OER process.