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Activated Ni–O–Ir Enhanced Electron Transfer for Boosting Oxygen Evolution Reaction Activity of LaNi<sub>1‐x</sub>Ir<sub>x</sub>O<sub>3</sub>

Jianyi LiState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaLirong ZhengInstitute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. ChinaBolong HuangDepartment of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 P. R. ChinaYang HuState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaLi AnState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaYaxiong YaoState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaMin LuState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaJing JinState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaNan ZhangState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaPinxian XiState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. ChinaChun‐Hua YanState Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China
2022en
ABI

Annotatsiya

Abstract Tuning the structure of the active center of catalysts to atomic level provides the most efficient utilization of the active component, which plays an especially important role for precious metals. In this study, the liquid phase ion exchange method is used to introduce atomic Ir into LaNiO 3 perovskite oxide, which shows excellent catalytic performance in the oxygen evolution reaction (OER). The catalyst, LaNi 0.96 Ir 0.04 O 3 , with the optimal concentration of Ir, displays an overpotential of just 280 mV at 10 mA cm −2 . The introduced Ir enriches the surface electron density significantly, which not only improves site‐to‐site electron transfer between O and Ni sites but also allows stable adsorption of the intermediates. The results of cyclic voltammetry tests reveal the superior overpotential and remarkable efficiency of the OER process because of the strong interactions in Ni–O–Ir. Moreover, the Ir atom inhibits the participation of a lattice oxygen oxidation mechanism (LOM) in LaNiO 3 that guarantees the stability of the catalyst in alkaline conditions. It is anticipated that this work will be instrumental for the preparation and study of a broad range of atomic metal‐doped perovskite oxides for water splitting.

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DOI
10.1002/smll.202204723

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