Recent Strategies for Ni₃S₂-Based Electrocatalysts with Enhanced Hydrogen Evolution Performance: A Tutorial Review.

Area of Science:

• Electrochemistry
• Materials Science
• Green Chemistry

Background:

• Water electrolysis is a key green hydrogen production method, with electrocatalyst efficiency being paramount.
• Nickel sulfides, particularly Ni3S2, exhibit potential for hydrogen evolution reaction (HER) catalysis due to their unique structure.
• Current Ni3S2 catalysts face challenges with high overpotential and reduced performance in alkaline media.

Purpose of the Study:

• To comprehensively review recent advancements in Ni3S2-based electrocatalysts for HER.
• To address limitations hindering practical application, such as high overpotential and alkaline instability.
• To inspire the design of novel transition metal catalysts for enhanced water electrolysis.

Main Methods:

• Literature review of Ni3S2-based electrocatalyst research for HER.
• Analysis of strategies to improve catalytic activity and stability.
• Survey of synthesis and modification techniques.

Main Results:

• Identified key strategies for enhancing Ni3S2 electrocatalyst performance in HER.
• Highlighted methods to reduce overpotential and improve stability in alkaline conditions.
• Showcased the potential of tailored Ni3S2 structures for efficient water splitting.

Conclusions:

• Ni3S2 electrocatalysts offer a promising avenue for efficient HER in water electrolysis.
• Overcoming overpotential and alkaline degradation are critical for practical application.
• Rational design of transition metal catalysts is essential for advancing green hydrogen technology.