A Multi-Interface Structure of Graphdiyne/Cobalt Oxides for Chlorine Production

Area of Science:

• Electrocatalysis
• Materials Science
• Chemical Engineering

Background:

• The chlor-alkali process requires efficient electrocatalysts for industrial chlorine production.
• Current electrocatalysts often lack the high activity and selectivity needed for optimal chlorine generation.

Purpose of the Study:

• To develop a novel electrocatalyst for enhanced chlorine production in the chlor-alkali process.
• To investigate the performance of in situ grown graphdiyne on cobalt oxides (GDY/Co3O4) for selective chlorine synthesis.

Main Methods:

• In situ growth of graphdiyne (GDY) on cobalt oxide (Co3O4) surfaces to create a multi-interface structure.
• Electrochemical characterization to evaluate catalytic activity, selectivity, and stability.
• Analysis of electron transfer and charge transport properties.

Main Results:

• The GDY/Co3O4 catalyst exhibited strong electron transfer and high charge transport density.
• Enhanced conductivity, reaction kinetics, and catalytic selectivity/activity were observed.
• The catalyst achieved a Faraday efficiency of 80.67% and an active chlorine yield rate of 184.40 mg h⁻¹ cm⁻².
• Superior long-term stability was demonstrated in low-concentration NaCl solutions.

Conclusions:

• The developed GDY/Co3O4 electrocatalyst shows significant potential for highly selective and efficient industrial chlorine production.
• The unique multi-interface structure and intrinsic properties of the catalyst contribute to its enhanced performance and stability.
• This material offers a promising solution to the challenges faced by the traditional chlor-alkali process.