A highly efficient FeP/CeO₂-NF hybrid electrode for the oxygen evolution reaction

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• Transition metal phosphides are recognized as effective electrocatalysts.
• Developing efficient and durable electrocatalysts is crucial for energy conversion technologies.

Purpose of the Study:

• To synthesize and characterize a novel FeP/CeO2-NF hybrid electrode.
• To evaluate the electrocatalytic performance of the FeP/CeO2-NF electrode for the oxygen evolution reaction (OER).

Main Methods:

• Fabrication of the FeP/CeO2-NF hybrid electrode using electrodeposition and high-temperature phosphorization.
• Electrochemical testing in an alkaline solution to assess OER performance, including overpotential, Tafel slope, and durability.

Main Results:

• The FeP/CeO2-NF electrode achieved an overpotential of 245 mV at 100 mA cm-2 for OER.
• Exhibited a low Tafel slope of 39.1 mV dec-1, indicating efficient OER kinetics.
• Demonstrated excellent durability, maintaining performance for 50 hours at 10 mA cm-2.

Conclusions:

• The FeP/CeO2-NF hybrid electrode is a highly efficient and durable electrocatalyst for OER.
• The synergistic effects between FeP and CeO2, along with the unique electrode structure, contribute to the enhanced performance.