Article

Enhancing Oxygen Evolution Reaction via a Surface Reconstruction-Induced Lattice Oxygen Mechanism

Subin ChoiDepartment of Chemistry, Seoul National University, Seoul 08826, Republic of KoreaSejun KimDepartment of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of KoreaSunghoon HanDepartment of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of KoreaJian WangSchool of Energy and Environment, City University of Hong Kong, Hong Kong G5703, Hong Kong SAR, ChinaJuwon KimDepartment of Chemistry, Seoul National University, Seoul 08826, Republic of KoreaBonho KooDepartment of Chemistry, Seoul National University, Seoul 08826, Republic of KoreaAlexander A. RyabinDepartment of Chemistry, Seoul National University, Seoul 08826, Republic of KoreaSebastian KunzeDepartment of Chemistry, Seoul National University, Seoul 08826, Republic of KoreaHyejeong HyunDepartment of Chemistry, Seoul National University, Seoul 08826, Republic of KoreaJeongwoo HanDepartment of Chemistry, Seoul National University, Seoul 08826, Republic of KoreaShu-Chih HawNano-science Group, National Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanKeun Hwa ChaeAdvanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul 02792, Republic of KoreaChang Hyuck ChoiDepartment of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of KoreaHyungjun KimDepartment of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of KoreaJongwoo LimDepartment of Chemistry, Institute of Applied Physics and Institute for Battery Research Innovation, Seoul National University, Seoul 08826, Republic of Korea

2024en

ABI

Abstract

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.

Identifiers

DOI: 10.1021/acscatal.4c03594

Citations and references

Cited by 20 references

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