The Differentiation of Oxophilic Ce-Induced Oxygen Vacancies and Single-Atom Sites for Synergistically Boosting Alkaline Hydrogen Evolution.

Key Points

• This research aims to explore how oxophilic cerium (Ce) affects the efficiency of hydrogen evolution reactions (HER) by differentiating active sites.
• Conducted experimental and mechanistic studies to analyze OH adsorption and H conversion at various sites.
• Investigated the role of electronic structure modulation by Ce on Ru sites and oxygen vacancies.
• The introduction of oxophilic Ce significantly improved OH adsorption at oxygen vacancies, enhancing catalytic efficiency.
• Distinct differentiation of oxygen vacancies and single-atom sites led to accelerated alkaline HER kinetics.

Abstract