Atomically dispersed chromium coordinated with hydroxyl clusters enabling efficient hydrogen oxidation on ruthenium.

ABSTRACT: Overcoming the sluggish kinetics of alkaline hydrogen oxidation reaction (HOR) is challenging but is of critical importance for practical anion exchange membrane fuel cells. Herein, abundant and efficient interfacial active sites are created on ruthenium (Ru) nanoparticles by anchoring atomically isolated chromium coordinated with hydroxyl clusters (Cr₁(OH)_x) for accelerated alkaline HOR. This catalyst system delivers 50-fold enhanced HOR activity with excellent durability and CO anti-poisoning ability via switching the active sites from Ru surface to Cr₁(OH)_x-Ru interface. Fundamentally different from the conventional mechanism merely focusing on surface metal sites, the isolated Cr₁(OH)_x could provide unique oxygen species

SUBMITTER: Zhang B 

PROVIDER: S-EPMC9537559 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature