Interface Engineering Induced Multi-Scale Self-Assembly NiFe-LDH Heterostructures for High-Performance Water...

Area of Science:

• Materials Science
• Electrochemistry
• Energy Conversion

Background:

• The urgent need for efficient energy solutions drives research into advanced catalysts.
• Developing cost-effective and high-performance bifunctional catalysts is critical for energy scarcity challenges.

Purpose of the Study:

• To engineer NiFe-LDH nanoplates using O2 plasma treatment for enhanced catalytic activity.
• To investigate the structural and electrochemical properties of the modified NiFe-LDH for water splitting applications.

Main Methods:

• Interface engineering of NiFe-LDH nanoplates via O2 plasma treatment for 30 minutes.
• Characterization of the resulting heterostructure with self-assembled polycrystalline nanowire arrays.
• Electrochemical testing for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media.

Main Results:

• O2 plasma treatment formed a heterostructure with a rough surface and regulated crystal plane exposure.
• The modified NiFe-LDH-P30 exhibited excellent structural stability due to strong interface coupling.
• Achieved low overpotentials for HER (154 mV) and OER (242 mV) at 10 mA cm-2.
• Demonstrated efficient water splitting with a low cell voltage of 1.63 V at 10 mA cm-2 using NiFe-LDH-P30 as a dual-electrode material.

Conclusions:

• Interface engineering via O2 plasma treatment is a novel and effective strategy for developing transition metal-based electrocatalysts.
• The NiFe-LDH-P30 catalyst shows significant promise for practical energy applications, particularly in water splitting.
• This approach offers a pathway to creating robust and highly active electrocatalysts for sustainable energy technologies.