Three-dimensional N-doped graphene hydrogel/NiCo double hydroxide electrocatalysts for highly efficient oxygen...

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• The oxygen evolution reaction (OER) is crucial for energy conversion technologies.
• Developing efficient and durable OER catalysts remains a significant challenge.

Purpose of the Study:

• To fabricate a highly hydrated structure for enhanced OER catalysis.
• To investigate the structure-performance relationship in OER.

Main Methods:

• Fabrication of a novel highly hydrated electrode material.
• Electrochemical characterization of the oxygen evolution reaction.

Main Results:

• The hydrated structure exhibited significantly enhanced catalytic activity and favorable kinetics for OER.
• The electrode demonstrated strong durability during the oxygen evolution reaction.
• Performance enhancement is attributed to a dual-active-site mechanism and high hydrophilicity.

Conclusions:

• The fabricated highly hydrated structure is a promising electrocatalyst for the oxygen evolution reaction.
• High hydrophilicity and dual-active sites are key factors for expediting water oxidation.
• This work offers a new strategy for designing efficient OER electrocatalysts.