TY  - JOUR
T1  - Fluorine-Induced Lattice Oxygen Participation in 2D Layered Double Hydroxide/MXene Hybrids for Efficient Oxygen Evolution
AU  - Pei, Chengang
AU  - Kim, Min-Cheol
AU  - Baeck, Unbeom
AU  - Hong, Won Tae
AU  - Kim, Jong Hun
AU  - Han, Hyungu
AU  - Kim, Jaekyum
AU  - Cho, Sung Min
AU  - Yu, Xu
AU  - Park, Jongwook
AU  - Park, Ho Seok
AU  - Kim, Jung Kyu
Y1  - 2024/11/11
PY  - 2024
DA  - 2024/11/11
DO  - https://doi.org/10.1002/advs.202410812
T2  - Advanced Science
JF  - Advanced Science
JO  - Advanced Science
JA  - Adv. Sci.
SP  - 2410812
VL  - n/a
IS  - n/a
KW  - electrochemical oxygen evolution
KW  - lattice oxygen mechanism
KW  - layered double hydroxide
KW  - oxygen vacancy
KW  - surface fluorination
PB  - John Wiley & Sons, Ltd
SN  - 2198-3844
UR  - https://doi.org/10.1002/advs.202410812
Y2  - 2024/12/20
N2  - Abstract In oxygen evolution reaction (OER), the participation of lattice oxygen can break the limitation of adsorption evolution mechanism, but the activation of lattice oxygen remains a critical challenge. Herein, a surface fluorinated highly active 2D/2D FeNi layered double hydroxide/MXene (F-LDH/MX) is demonstrated, boosting OER with the enhanced lattice-oxygen-mediated path. The introduction of fluorine promotes the self-evolution of catalyst in an alkaline environment, even without an external current. It further accelerates the formation of active metal oxyhydroxides with abundant oxygen vacancies under the operating potential. The introduced oxygen vacancy activates the lattice oxygen, increasing the proportion of lattice oxygen mechanism in OER. Owing to the synergistic effects of the 2D/2D hierarchical structure and the modulated active surface, F-LDH/MX possesses excellent electrochemical performances, including a low overpotential of 251 mV at 10 mA cm?2, a low Tafel slope of 40.28 mV dec?1, and robust stability. The water electrolyzer system with F-LDH/MX as the anode offers the benchmark current density at a low cell voltage of 1.53 V, while the Zn-air battery with F-LDH/MX as the air electrode exhibits a higher power density of 75.43 mW cm?2. This study presents a promising strategy to design highly active electrocatalysts for energy conversion and storage.
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