Efficient and durable S-doped Ni/FeOOH electrocatalysts for oxygen evolution reactions

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• Developing efficient and durable Earth-abundant electrocatalysts for the oxygen evolution reaction (OER) is crucial for energy technologies.
• Current methods often require energy- and time-intensive synthesis strategies.

Purpose of the Study:

• To develop a facile and efficient strategy for synthesizing advanced OER electrocatalysts.
• To investigate the impact of sulfur doping on nickel-iron oxyhydroxide performance.

Main Methods:

• Facile synthesis of sulfur-doped nickel-iron oxyhydroxide (S-Ni/FeOOH) nanoparticles on nickel-iron foam (NFF).
• Electrochemical characterization of S-Ni/FeOOH@NFF electrodes for OER activity and stability.

Main Results:

• The S-Ni/FeOOH@NFF electrode demonstrated significantly enhanced OER performance compared to undoped Ni/FeOOH@NFF.
• Achieved a low overpotential of 229 mV at 10 mA cm⁻², a 180 mV improvement.
• Exhibited remarkable stability, retaining 95% current density after 150 hours at 100 mA cm⁻².

Conclusions:

• Sulfur doping is an effective strategy to boost the OER performance of nickel-iron oxyhydroxides.
• The developed S-Ni/FeOOH@NFF presents a highly efficient and durable electrocatalyst for OER applications.