journal article·2026-02Open access

Valence‐Engineering of CeO 2 Redox Modulator Boosts the Oxygen Electrocatalysis Performance in Fe/Co Dual‐Atom Catalyst

Hengqi Liu, Jinzhen Huang, Shengyu Ma, Rui Xiong, Jiong Zhao, Qiang Fu, Hang Wei, Zhiguo Liu, Xianjie Wang, Tai Yao, Bo Song

Advanced Science· Volume 13· Issue 11

Abstract

Abstract Dual‐atom nitrogen‐doped carbon catalysts have garnered considerable interest as air electrodes for rechargeable zinc‐air batteries (ZABs), owing to their outstanding bifunctional oxygen electrocatalytic activity. Nonetheless, their practical implementation is hindered by durability issues during the oxygen reduction reaction (ORR), as the active sites are degraded by the oxidative by‐products. Furthermore, the sluggish electron transfer obstructs the oxidation state transitions of Co/Fe centers to limit the oxygen evolution reaction (OER) activity. Here, the valence engineering is performed in CeO 2 redox modulator that is composed with Fe/Co dual‐atom catalyst (FeCo─N─C), to resolve the stability and activity issues. The valence‐engineered CeO 2 with a fast Ce 4+ /Ce 3+ redox process can efficiently scavenge the highly oxidative by‐products in ORR to improve the durability. In addition, the interaction of CeO 2 with FeCo─N─C can accelerate electron transfer and lower the Co redox potential during the OER. The ZABs assembled with optimized FeCo─N─C/CeO 2 as the air electrode display a maximum power density of 335 mWcm −2 without significant deterioration after ≈1000 h of continuous cycling. Therefore, compositing with valence‐engineered CeO 2 provides a simple and effective solution to resolve the stability and activity issues of FeCo─N─C as an air electrode.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · CO2 Reduction Techniques and Catalysts

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

Affiliations

School of Physics Harbin Institute of Technology Harbin 150001 China

PSI Center for Energy and Environmental Sciences Villigen PSI CH‐5232 Switzerland

National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150001 China

School of future technology Harbin Institute of Technology Harbin 150001 China

Department of Applied Physics The Hong Kong Polytechnic University Kowloon Hong Kong 999077 China

College of Chemistry and Chemical Engineering Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules Inner Mongolia University Hohhot 010021 China

Laboratory for Space Environment and Physical Sciences Harbin Institute of Technology Harbin Institute of Technology Harbin 150001 China

National Key Laboratory of Laser Spatial Information Harbin Institute of Technology Harbin Institute of Technology Harbin 150001 China

Frontier Research Center of Space Environment Interacting with Matter Harbin Institute of Technology Harbin 150001 China

Zhengzhou Research Institute Harbin Institute of Technology Zhengzhou 450046 China

Funding

National Science Fund for Distinguished Young Scholars · National Natural Science Foundation of China · National Key Research and Development Program of China

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