Nano-Micro Letters, Volume. 17, Issue 1, 011(2025)
Boosting Oxygen Evolution Reaction Performance on NiFe-Based Catalysts Through d-Orbital Hybridization
Anion-exchange membrane water electrolyzers (AEMWEs) for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based catalysts. By introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units, the d-orbital and electronic structures can be adjusted, which is an important strategy to achieve sufficient oxygen evolution reaction (OER) performance in AEMWEs. Herein, the ternary NiFeM (M: La, Mo) catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this work. Experimental and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen, resulting in enhanced adsorption strength of oxygen intermediates, and reduced rate-determining step energy barrier, which is responsible for the enhanced OER performance. More critically, the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm-2 in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.
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Xing Wang, Wei Pi, Sheng Hu, Haifeng Bao, Na Yao, Wei Luo. Boosting Oxygen Evolution Reaction Performance on NiFe-Based Catalysts Through d-Orbital Hybridization[J]. Nano-Micro Letters, 2025, 17(1): 011
Category: Research Articles
Received: Jun. 8, 2024
Accepted: Sep. 1, 2024
Published Online: Feb. 12, 2025
The Author Email: Bao Haifeng (baohaifeng@wtu.edu.cn), Yao Na (yaona@wtu.edu.cn), Luo Wei (wluo@whu.edu.cn)