biostudies-literatureZhang JNational Key R&D Program of ChinaEuropean Union's Horizon 2020 research and innovation programmeNational Key Research and Development Program of ChinaNatural Science Foundation of Jiangsu ProvinceCRC 1415e202209486https://www.ebi.ac.uk/biostudies/studies/S-EPMC9804859biostudies-literatureUnknown61(39)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-Angewandte Chemie (International ed. in English)Competitive Adsorption: Reducing the Poisoning Effect of Adsorbed Hydroxyl on Ru Single-Atom Site with SnO₂ for Efficient Hydrogen Evolution.PMC9804859No. BK20220369GrapheneCore3: 881603No. 4175905172021YFA1502700Zhang JFeng XChen GSun DLiu QSun HFan CTang YfalseCompetitive Adsorption: Reducing the Poisoning Effect of Adsorbed Hydroxyl on Ru Single-Atom Site with SnO₂ for Efficient Hydrogen Evolution.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-2022-01-01T00:00:00Z2022 Sep2026-03-17T16:01:25.578Z2025-04-04T21:04:35.353ZS-EPMC98048593586211210.1002/anie.202209486