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Updated: Jun 24, 2025
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Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
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Potassium fluoride-induced FeOOH formation in NiFe oxalate for improved oxygen evolution performance
Seungjoon Ha1, Youngji Kim1, Taeyeop Kim1
1Department of Chemical Engineering, Changwon National University, 51140 Changwon, Republic of Korea. seunghwa@changwon.ac.kr.
Chemical Communications (Cambridge, England)
|June 13, 2024
Summary
This study presents a simple method to create iron-enriched nickel-iron oxyhydroxide catalysts. The optimized catalyst shows high efficiency for electrochemical reactions with low energy input.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Nickel-iron oxyhydroxides are promising electrocatalysts.
- Controlling elemental distribution is crucial for catalyst performance.
- Facile synthesis routes are needed for practical applications.
Purpose of the Study:
- To develop an in situ synthetic route for nickel-iron oxyhydroxide.
- To achieve high surface enrichment of iron using potassium fluoride.
- To evaluate the catalytic performance of the optimized material.
Main Methods:
- Facile synthesis of nickel-iron oxyhydroxide from nickel-iron oxalate.
- Addition of potassium fluoride to control elemental distribution.
- Operando Raman spectroscopy for material characterization.
- Electrochemical measurements to assess catalytic efficiency.
Main Results:
- A facile in situ synthetic route for nickel-iron oxyhydroxide was established.
- Potassium fluoride addition led to >80 at% surface iron enrichment.
- Operando Raman spectroscopy confirmed FeOOH formation.
- The optimized catalyst achieved 10 mA cm-2 at 226 mV overpotential.
Conclusions:
- The developed method enables precise control over iron distribution in nickel-iron oxyhydroxides.
- High surface iron enrichment significantly enhances catalytic activity.
- This work provides an efficient electrocatalyst for energy conversion applications.
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