Choi, Subin Kim, Se-Jun Han, Sunghoon Wang, Jian Kim, Juwon Koo, Bonho Ryabin, Alexander A. Kunze, Sebastian Hyun, Hyejeong Han, Jeongwoo Haw, Shu-Chih Chae, Keun Hwa Choi, Chang Hyuck Kim, Hyungjun Lim, Jongwoo 2024-10-16T16:30:18Z 2024-10-16T16:30:18Z 2024-10-17 2024-10 2155-5435 https://pubs.kist.re.kr/handle/201004/150809 Systematic control of surface reconstruction during catalysis remains challenging. Particularly, inducing a surface structure reconstruction following the lattice oxygen oxidation mechanism (LOM), which can reduce the overpotential in oxygen evolution reaction (OER) catalysts, has not been extensively investigated. The mechanism of the OER of transition-metal-oxide-based catalysts can be facilitated by manipulating the local coordination structure to modulate the reactivity of lattice oxygen. Herein, we report an in situ surface reconstruction strategy by doping F into LaNiO3 to distort the NiO6 octahedral sites, weaken the Ni-O bonds, and increase lattice oxygen reactivity during OER. The as-prepared LaNiO2.9F0.1 exhibits enhanced performances toward OER with a low overpotential of 320 mV at 10 mA cm(-2), a small Tafel slope of 78 mV dec(-1), and good long-term stability in alkaline media. Comprehensive analysis reveals that the in situ self-reconstructed surface favors the LOM pathway for the OER, resulting in a considerably improved performance. These results demonstrate that the lattice oxygen acts as a switch for directing the OER mechanism, and further, controlling the lattice oxygen reactivity emerges as a promising approach for dynamic self-reconstruction to highly active OER electrocatalysts. English American Chemical Society Enhancing Oxygen Evolution Reaction via a Surface Reconstruction-Induced Lattice Oxygen Mechanism Article 10.1021/acscatal.4c03594 1 ACS Catalysis, v.14, no.20, pp.15096 - 15107 ACS Catalysis 14 20 15096 15107 N scie scopus 001325637600001 Chemistry, Physical Chemistry Article WATER OXIDATION METAL PEROVSKITES ORIGIN transition metal oxide oxygenevolution reaction lattice oxygen oxidation mechanism surface reconstruction electrocatalysis