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Updated: Jan 16, 2026
08:43
Potentiodynamic Corrosion Testing
Published on: September 4, 2016
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Fe/Co Co-Doping Engineering for Corrosion-Resistant and Effective Seawater Electrolysis
Jianxi Lu1, Zhichao Yu2, Xiaotian Wei1
1Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China.
Advanced Materials (Deerfield Beach, Fla.)
|September 29, 2025
Summary
This study developed a novel catalyst for direct seawater electrolysis, achieving cost-effective green hydrogen production below $1/kg. The durable Ru@FeCo-Ni(OH)2 electrode demonstrates scalability for industrial applications.
Area of Science:
- Electrochemistry
- Materials Science
- Sustainable Energy
Background:
- Direct seawater electrolysis offers a sustainable hydrogen production route.
- Challenges include catalyst scalability, chloride corrosion, and cost-effectiveness.
Purpose of the Study:
- To develop a scalable, cost-efficient catalyst for direct seawater electrolysis.
- To enhance catalyst durability and chloride corrosion resistance.
Main Methods:
- A one-step interfacial redox strategy was used to create Fe/Co co-doped Ru@Ni(OH)2 electrodes (Ru@FeCo-Ni(OH)2).
- Fabrication of large-scale (5000 cm2) electrodes with consistent performance.
- Operando spectroscopy and DFT calculations elucidated the catalytic mechanism.
Main Results:
- The Ru@FeCo-Ni(OH)2 electrodes demonstrated over 3000 hours of durability.
- Achieved hydrogen production cost of $0.87/kg using unpurified seawater, surpassing DOE targets.
- Synergistic co-doping optimized hydrogen evolution and formed chloride-resistant layers for oxygen evolution.
Conclusions:
- The developed catalyst provides a scalable pathway for cost-effective green hydrogen production directly from seawater.
- Mechanistic insights into active site evolution offer a new paradigm for bifunctional catalyst design.
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