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Published on: June 18, 2013
Flash-heating-assisted construction of NiFe-based nanosheet arrays for efficient alkaline oxygen evolution
Xiaotong Wan1, Yuxiang Guo1, Penghui Huang2
1State Key Laboratory of New Textile Materials and Advanced Processing, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China. ywliu@hust.edu.cn.
Chemical Communications (Cambridge, England)
|August 5, 2026
Summary
A novel flash-heating method creates durable nickel-iron (NiFe) nanosheet arrays for efficient alkaline oxygen evolution. This electrode demonstrates excellent stability and performance in electrochemical water splitting.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Efficient electrocatalysts are crucial for alkaline oxygen evolution reactions (OER) in water splitting.
- Developing stable and cost-effective electrodes for OER remains a significant challenge.
Purpose of the Study:
- To develop a novel flash-heating-assisted strategy for constructing self-supported NiFe nanosheet arrays on Ni foam for alkaline OER.
- To investigate the electrochemical performance and stability of the synthesized electrode.
Main Methods:
- A two-step synthesis strategy involving flash heating was employed to create NiFe nanosheet arrays on Ni foam.
- Electrochemical techniques were used to evaluate the oxygen evolution reaction (OER) activity and long-term stability of the electrode.
Main Results:
- The electrode exhibited low overpotentials of 233 and 255 mV at current densities of 100 and 400 mA cm-2, respectively.
- The electrode demonstrated remarkable stability, operating continuously for 200 hours and resisting start/stop perturbations.
- The enhanced performance is attributed to rapid charge transfer and operando Ni(Fe)OOH reconstruction kinetics.
Conclusions:
- The flash-heating-assisted synthesis provides an effective route to high-performance NiFe-based OER electrocatalysts.
- The self-supported NiFe nanosheet arrays show great promise for efficient and durable alkaline oxygen evolution applications.
