Competitive Adsorption: Reducing the Poisoning Effect of Adsorbed Hydroxyl on Ru Single-Atom Site with SnO₂ for Efficient Hydrogen Evolution.

ABSTRACT: Ruthenium (Ru) has been theoretically considered a viable alkaline hydrogen evolution reaction electrocatalyst due to its fast water dissociation kinetics. However, its strong affinity to the adsorbed hydroxyl (OH_ad ) blocks the active sites, resulting in unsatisfactory performance during the practical HER process. Here, we first reported a competitive adsorption strategy for the construction of SnO₂ nanoparticles doped with Ru single-atoms supported on carbon (Ru SAs-SnO₂ /C) via atomic galvanic replacement. SnO₂ was introduced to regulate the strong interaction between Ru and OH_ad by the competitive adsorption of OH_ad between Ru and SnO₂ , which alleviated the poisoning of Ru sites. As a consequence, the Ru SAs-

SUBMITTER: Zhang J 

PROVIDER: S-EPMC9804859 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature