journal article·2025-11

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

Advanced Functional Materials· Volume 35· Issue 48
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Abstract

Abstract 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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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MOE Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering Lehn Institute of Functional Materials, IGCME School of Chemistry Sun Yat‐Sen University Guangzhou Guangdong 510275 China

Siyuan laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Guangdong Provincial Key Laboratory of Nanophotonic Manipulation Department of Physics Jinan University Guangzhou Guangdong 510632 China

Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics GBA Branch of Aerospace Information Research Institute Chinese Academy of Sciences Guangzhou 510700 China

Department of Physics Tamkang University New Taipei 25137 Taiwan

Institut Europeen des Membranes Adaptive Supramolecular Nanosystems Group University of Montpellier ENSCM‐CNRS UMR5635 Place E. Bataillon CC047 Montpellier 34095 France

Department of Mechanical Engineering Oakland University Rochester Hills Michigan 48309 United States

School of Materials Science and Engineering Henan Normal University Xinxiang 453007 China

Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 China

Funding

National Natural Science Foundation of China · Postdoctoral Research Foundation of China · Key Research and Development Program of Hunan Province of China · Science and Technology Planning Project of Guangdong Province

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