CoMo layered double hydroxide equipped with carbon nanotubes for electrocatalytic oxygen evolution reaction

Area of Science:

• Materials Science
• Electrochemistry
• Sustainable Energy

Background:

• Electrochemical water splitting is key for sustainable hydrogen production.
• The oxygen evolution reaction (OER) is a bottleneck in water electrolysis due to slow kinetics.
• Efficient OER electrocatalysts are crucial for advancing electrolysis technology.

Purpose of the Study:

• To develop a high-performance electrocatalyst for the oxygen evolution reaction (OER).
• To enhance the efficiency and stability of water splitting for hydrogen production.
• To investigate the effect of hybridization on electrocatalyst performance.

Main Methods:

• Synthesis of two-dimensional CoMo Layered Double Hydroxide (CoMo LDH) nanosheets.
• Deposition of CoMo LDH nanosheets onto conductive carbon nanotubes (CNTs).
• Characterization of the hybrid CoMo LDH/CNTs electrocatalyst for OER performance.

Main Results:

• The CoMo LDH/CNTs hybrid composite demonstrated superior OER performance compared to bare CoMo LDH.
• Achieved a low overpotential of 268 mV at a current density of 10 mA cm^-2.
• Exhibited excellent catalytic stability for over 40 hours.

Conclusions:

• Hybridization with conductive frameworks like CNTs enhances OER activity by increasing active sites and conductivity.
• The developed CoMo LDH/CNTs catalyst offers a promising low-cost solution for efficient hydrogen production.
• This strategy can guide the design of advanced electrocatalysts for energy conversion.