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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Lattice-Oxidation-Driven Efficient OER in FeOOH/NiFeOx Heterointerface Electrocatalyst via Laser-Corrosion
Rong Lu1, Jinlong Wei1,2, Junli Wang2
1Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, China.
Small Methods
|March 12, 2026
Summary
This study introduces a novel nickel-iron foam electrode for efficient oxygen evolution reactions. The new material offers a cost-effective and durable alternative to precious metal catalysts for water splitting.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Precious-metal catalysts are expensive for oxygen evolution reactions (OER).
- Nickel-iron oxides offer a low-cost alternative but suffer from poor conductivity and active site utilization.
- Developing efficient and economical catalysts for OER is crucial for industrial applications like water splitting.
Purpose of the Study:
- To develop a novel, self-supporting heterostructured electrode for enhanced oxygen evolution reaction (OER) performance.
- To overcome the limitations of poor electrical conductivity and inefficient active site utilization in nickel-iron based materials.
- To provide a scalable and cost-effective solution for industrial alkaline water splitting.
Main Methods:
- Fabrication of a heterostructured electrode (FeOOH/NiFeOx/NFF) using laser ablation and chemical corrosion.
- Characterization of the electrode's unique heterogeneous structure and surface properties (superhydrophilic and aerophobic).
- Evaluation of the electrode's electrocatalytic activity for OER, including overpotential and durability measurements.
- In situ spectroscopy and chemical probing to elucidate the reaction mechanism.
Main Results:
- The FeOOH/NiFeOx/NFF electrode exhibited an ultralow overpotential of 208 mV at 10 mA cm-2.
- The material demonstrated excellent long-term durability for the oxygen evolution reaction.
- The heterostructured design promoted electrolyte infiltration, gas release, and charge transfer.
- Mechanistic studies indicated a lattice oxidation mechanism governs the exceptional OER performance.
Conclusions:
- The developed FeOOH/NiFeOx/NFF electrode presents a high-performance and economically feasible alternative to precious-metal catalysts for OER.
- The novel fabrication strategy offers a viable and scalable pathway for designing advanced electrocatalysts.
- This work advances the development of efficient catalysts for industrial alkaline water splitting applications.
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