Dynamic Electron Spring Effect in Hollow Fe 2 O 3 /CoSe 2 Heterostructure Enhance Ethanol Electro‐Oxidation Activity and Stability

Shunlian Ning; Yongqi Jian; Guang‐qiang Yu; Jinchang Xu; Ming‐hsien Lee; Dawei Wang; Hongyan Chen; Mihail Barboiu; Xiaojun Liu; Dengke Zhao; Linjing Yang; Nan Wang

doi:10.1002/adfm.202509007

Dynamic Electron Spring Effect in Hollow Fe 2 O 3 /CoSe 2 Heterostructure Enhance Ethanol Electro‐Oxidation Activity and Stability

Shunlian Ning, Yongqi Jian, Guang‐qiang Yu, Jinchang Xu, Ming‐hsien Lee, Dawei Wang, Hongyan Chen, Mihail Barboiu, Xiaojun Liu, Dengke Zhao, …

Advanced Functional Materials, Vol.35(48)

10/06/2025

: https://doi.org/10.1002/adfm.202509007

electronic structure regulation

ethanol oxidation reaction

Fe2O3/CoSe2 heterostructure

spring effect

Developing efficient non‐noble electrocatalysts with high activity and selectivity for ethanol oxidation reaction (EOR) across a wide potential range remains a significant challenge in hybrid energy systems. Herein, hollow Fe 2 O 3 /CoSe 2 heterostructures (H‐Fe 2 O 3 /CoSe 2 @C) via interface engineering are reported as highly effective EOR promising electrocatalysts. Characterizations reveal that Fe 2 O 3 functions as a dynamic electron spring to tune the electronic structure of Co sites, accelerating the formation of the Fe 2 O 3 /CoOOH heterostructure while suppressing Fe 2 O 3 /CoO 2 evolution. In situ Raman spectroscopy and theoretical calculation confirm that the Fe 2 O 3/ CoOOH heterostructure enhances EOR kinetics and lowers the energy barrier of the potential‐determining step. Quasi in situ X‐ray photoelectron spectroscopy further demonstrates that Fe 2 O 3 stabilizes Co 3+ against overoxidation, expanding the operational potential window. Consequently, H‐Fe 2 O 3 /CoSe 2 @C achieves outstanding EOR performance, exhibiting 10 mA cm −2 @1.30 V vs. RHE with a high faradaic efficiency of 99% at 1.30 V. Ethanol‐assisted Zn‐Air battery/water splitting devices based on H‐Fe 2 O 3 /CoSe 2 @C demonstrate enhanced energy conversion efficiency, with voltage reduced by 210 and 180 mV at 10 mA cm −2 , respectively. This work provides critical insights for designing heterostructure electrocatalysts and advancing the utilization of biomass energy.

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: Dynamic Electron Spring Effect in Hollow Fe 2 O 3 /CoSe 2 Heterostructure Enhance Ethanol Electro‐Oxidation Activity and Stability
: Shunlian Ning - Sun Yat-sen University
Yongqi Jian - Jinan University
Guang‐qiang Yu - Jinan University
Jinchang Xu - Chinese Academy of Sciences
Ming‐hsien Lee - Tamkang University
Dawei Wang - Sun Yat-sen University
Hongyan Chen - Sun Yat-sen University
Mihail Barboiu - Université de Montpellier, IEM - Institut Européen des Membranes
Xiaojun Liu - Oakland University
Dengke Zhao - Henan Normal University
Linjing Yang - Kunming University of Science and Technology
Nan Wang - Jinan University
: Advanced Functional Materials, Vol.35(48)
: 99287579309311
: Université de Montpellier; IEM - Institut Européen des Membranes
: English
: Journal article
: hal-05735284