Recent Progress on Stability of Layered Double Hydroxide-Based Catalysts for Oxygen Evolution Reaction

Area of Science:

• Materials Science
• Electrochemistry
• Green Chemistry

Background:

• Water electrolysis is a key technology for green hydrogen generation.
• The oxygen evolution reaction (OER) is kinetically limited, requiring significant overpotential.
• Layered double hydroxides (LDHs) are promising low-cost OER catalysts but suffer from poor long-term stability.

Purpose of the Study:

• To review the deactivation mechanisms of LDH-based OER catalysts.
• To analyze strategies for improving the stability of LDH OER catalysts.
• To guide the development of robust catalysts for industrial water electrolysis.

Main Methods:

• Review of literature on LDH catalyst deactivation.
• Analysis of various stabilization strategies for LDHs.
• Discussion of advanced characterization and fabrication techniques.

Main Results:

• Identified key deactivation pathways for LDHs under OER conditions.
• Highlighted effective methods for enhancing LDH stability, including nanosheet synthesis, doping, and composite formation.
• Demonstrated the potential of advanced carbon materials in stabilizing LDHs.

Conclusions:

• Improving the long-term stability of LDH OER catalysts is critical for industrial green hydrogen production.
• A multi-faceted approach combining material design and advanced fabrication is necessary.
• Further research into understanding and mitigating deactivation mechanisms will accelerate LDH catalyst development.