Construction of Core@Shell Ir-FeSe@CoNiFeSe by Interface Engineering in Conjunction with Atomic Doping for Enhanced...

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Interface engineering and atomic doping are key strategies for developing efficient oxygen evolution reaction (OER) catalysts.
• Optimizing catalyst active sites and electronic properties is crucial for enhancing catalytic activity and stability.

Purpose of the Study:

• To design and synthesize a novel Ir-doped FeSe@CoNiFeSe catalyst integrating core@shell confinement, heterointerface, and atomic doping for OER.
• To investigate the synergistic effects of these strategies on catalytic performance and water splitting.

Main Methods:

• Synthesis of Ir-doped FeSe@CoNiFeSe core@shell nanostructures.
• Electrochemical characterization including OER performance testing in alkaline media.
• Evaluation of overall water splitting efficiency in a two-electrode configuration.

Main Results:

• The Ir-FeSe@CoNiFeSe catalyst demonstrated excellent OER activity with a low overpotential of 209 mV at 10 mA cm⁻² and durability over 70 hours.
• The catalyst exhibited superior performance in overall water splitting, requiring only 1.44 V at 10 mA cm⁻².
• Synergistic effects from the core@shell structure, heterointerface, and Ir doping significantly enhanced charge transfer and catalytic kinetics.

Conclusions:

• The Ir-FeSe@CoNiFeSe catalyst effectively utilizes the combined benefits of interface engineering and atomic doping for enhanced electrocatalytic performance.
• This work highlights the potential of combining structural design and doping strategies to create advanced catalysts for energy conversion applications.