{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["147(30)"],"submitter":["Li Y"],"pubmed_abstract":["Green hydrogen from water requires the development of efficient and low-cost catalysts for anodic oxygen evolution reaction (OER), which is the main obstacle for electrochemical water splitting. Herein, we focus on an OER catalyst (Pb<sub>2</sub>CoRuO<sub>7</sub>) featuring Ru<sup>6+</sup>, which exhibits an ultralow overpotential of 176 mV at 10 mA cm<sup>-2</sup> and a Tafel slope of 30.52 mV dec<sup>-1</sup> vs 340 mV at 10 mA cm<sup>-2</sup> and a Tafel slope of 111.54 mV dec<sup>-1</sup> for RuO<sub>2</sub> in 1.0 M KOH solution. In situ X-ray absorption experiments demonstrated the gradual conversion of Ru<sup>5+</sup> ions into high-valence Ru<sup>6+</sup>, while a portion of Co<sup>3+</sup> ions transformed into Co<sup>4+</sup> during the OER process. Density functional theory calculations revealed that the ultrahigh OER activity of Pb<sub>2</sub>CoRuO<sub>7</sub> was contributed by both metal-site adsorbate evolution (MAE) at the Co site and the lattice-oxygen-vacancy-site (LOV) mechanism involving lattice oxygen located between Ru<sup>6+</sup> and Co. Our work presents a new and unusual OER catalyst where both the MAE and LOV mechanisms cooperatively facilitate catalytic activity."],"journal":["Journal of the American Chemical Society"],"pagination":["26854-26864"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12314902"],"repository":["biostudies-literature"],"pubmed_title":["Hexavalent Ru Catalyst with Both Lattice Oxygen and Metal Ion Mechanisms Coactive for Water Oxidation."],"pmcid":["PMC12314902"],"pubmed_authors":["Fan Y","Hu Z","Zhang L","Zhang S","Huang YC","Kuo CY","Chan TS","Li Y","Ku YC","Jin C","Chen CT","Haw SC","Ye D","Jing C","Zhao J","Kao CW","Zhao H"],"additional_accession":[]},"is_claimable":false,"name":"Hexavalent Ru Catalyst with Both Lattice Oxygen and Metal Ion Mechanisms Coactive for Water Oxidation.","description":"Green hydrogen from water requires the development of efficient and low-cost catalysts for anodic oxygen evolution reaction (OER), which is the main obstacle for electrochemical water splitting. Herein, we focus on an OER catalyst (Pb<sub>2</sub>CoRuO<sub>7</sub>) featuring Ru<sup>6+</sup>, which exhibits an ultralow overpotential of 176 mV at 10 mA cm<sup>-2</sup> and a Tafel slope of 30.52 mV dec<sup>-1</sup> vs 340 mV at 10 mA cm<sup>-2</sup> and a Tafel slope of 111.54 mV dec<sup>-1</sup> for RuO<sub>2</sub> in 1.0 M KOH solution. In situ X-ray absorption experiments demonstrated the gradual conversion of Ru<sup>5+</sup> ions into high-valence Ru<sup>6+</sup>, while a portion of Co<sup>3+</sup> ions transformed into Co<sup>4+</sup> during the OER process. Density functional theory calculations revealed that the ultrahigh OER activity of Pb<sub>2</sub>CoRuO<sub>7</sub> was contributed by both metal-site adsorbate evolution (MAE) at the Co site and the lattice-oxygen-vacancy-site (LOV) mechanism involving lattice oxygen located between Ru<sup>6+</sup> and Co. Our work presents a new and unusual OER catalyst where both the MAE and LOV mechanisms cooperatively facilitate catalytic activity.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Jul","modification":"2026-03-15T11:38:04.205Z","creation":"2025-08-12T03:04:54.855Z"},"accession":"S-EPMC12314902","cross_references":{"pubmed":["40671169"],"doi":["10.1021/jacs.5c08425"]}}