Cobalt-Borate Nanoarray: An Efficient and Durable Electrocatalyst for Water Oxidation under Benign Conditions

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• Efficient electrocatalysts for the oxygen evolution reaction (OER) are essential for sustainable energy technologies.
• Developing earth-abundant catalysts under benign conditions remains a significant challenge.

Purpose of the Study:

• To report the electrochemical synthesis of novel Cobalt-Bismuth nanoarrays on carbon cloth (Co-Bi NA/CC).
• To evaluate the electrocatalytic performance and durability of the synthesized Co-Bi NA/CC for OER.

Main Methods:

• Electrochemical synthesis of Co-Bi NA/CC from a CoS2 nanoarray precursor.
• Characterization of the material's structure and morphology.
• Electrochemical testing for OER activity and long-term stability.

Main Results:

• The Co-Bi NA/CC electrode demonstrated excellent electrocatalytic performance for OER.
• An overpotential of 411 mV was required to achieve a current density of 10 mA cm⁻².
• The electrode exhibited outstanding long-term electrochemical durability over 20 hours.

Conclusions:

• The novel Co-Bi NA/CC is a highly efficient and durable electrocatalyst for the oxygen evolution reaction.
• This development offers a promising earth-abundant alternative for OER applications.