Journal article
Scalable interfacial engineering of Fe–CoOOH nanosheets via in situ electrochemical restructuring for industrial oxygen evolution
Applied surface science, v 723, 165549
30 Mar 2026
Abstract
In-Situ Restructured Fe-CoOOH Nanosheets for High-Performance OER.
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•Scalable, calcination-free synthesis of Fe–CoOOH via electrochemical restructuring.•Microcrack-enriched nanosheets boost mass transport and active site exposure.•283.7 mV overpotential at 100 mA cm−2, outperforming IrO2 in alkali.•Fe doping enables Co4+ formation and accelerates OER kinetics.
The development of efficient, durable, and scalable oxygen evolution reaction (OER) electrocatalysts is pivotal for industrial green hydrogen production. Here, we report a calcination-free interfacial engineering strategy to fabricate Fe-doped CoOOH (Fe–CoOOH) nanosheets directly on nickel foam through in situ electrochemical restructuring. The resulting catalyst features vertically aligned, microcrack-enriched nanosheets with optimized electronic structure, delivering an ultralow overpotential of 283.7 mV at 100 mA cm−2 and a Tafel slope of 28.2 mV dec−1 in 1 M KOH—surpassing Ni foil. It enables stable operation for over 150 h in a practical anion exchange membrane water electrolyzer (AEMWE). In situ Raman spectroscopic, DFT and XPS analyses reveal that Fe doping promotes the formation of high-valent Co4+ species, weakens O–H bonding, enhances electrical conductivity, and shifts the OER rate-determining step from *OOH formation to a faster surface transformation pathway. This work presents a scalable, energy-efficient route to high-performance, earth-abundant OER electrocatalysts, offering a viable design principle for next-generation industrial water electrolysis.
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Details
- Title
- Scalable interfacial engineering of Fe–CoOOH nanosheets via in situ electrochemical restructuring for industrial oxygen evolution
- Creators
- Wenxin Jiao - Shanghai Polytechnic UniversityJiaxun Huang - Foshan UniversityZhenghu Zhu - State Key Laboratory of Vehicle NVH and Safety TechnologyXinzhou Ma - Foshan UniversityHaofeng Lu - Shanghai Polytechnic UniversityKang Zhang - Shanghai Polytechnic UniversityCheng Chen - Shanghai Polytechnic UniversityXinfeng Wu - Shanghai Polytechnic UniversityYonghou Xiao - Shanghai Polytechnic UniversityWanghui Wei - Shanghai Institute of Measurement and Testing TechnologyMinjie Xue - Shanghai Institute of Measurement and Testing TechnologyWeiheng Shih - Drexel UniversityDonghai Lin (Corresponding Author) - Shanghai Polytechnic University
- Publication Details
- Applied surface science, v 723, 165549
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001648871800001
- Scopus ID
- 2-s2.0-105024894205
- Other Identifier
- 991022196569604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Coatings & Films
- Physics, Applied
- Physics, Condensed Matter