Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital HybridizationOA
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.
Xing Wang;Wei Pi;Sheng Hu;Haifeng Bao;Na Yao;Wei Luo
State Key Laboratory of New Textile Materials and Advanced Processing Technology,Key Laboratory of New Textile Materials and Applications of Hubei Province,School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,People’s Republic of ChinaState Key Laboratory of New Textile Materials and Advanced Processing Technology,Key Laboratory of New Textile Materials and Applications of Hubei Province,School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,People’s Republic of ChinaState Key Laboratory of New Textile Materials and Advanced Processing Technology,Key Laboratory of New Textile Materials and Applications of Hubei Province,School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,People’s Republic of ChinaState Key Laboratory of New Textile Materials and Advanced Processing Technology,Key Laboratory of New Textile Materials and Applications of Hubei Province,School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,People’s Republic of ChinaState Key Laboratory of New Textile Materials and Advanced Processing Technology,Key Laboratory of New Textile Materials and Applications of Hubei Province,School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,People’s Republic of ChinaCollege of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,People’s Republic of China
化学
NiFe-based catalystsd-orbital couplingOxygen evolution reactionAnion exchange membrane electrolyzer
《Nano-Micro Letters》 2025 (1)
P.281-292,12
financially supported by the National Natural Science Foundation of China(22309137,22279095)Open subject project State Key Laboratory of New Textile Materials and Advanced Processing Technologies(FZ2023001).
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