Scalable Cathodic H₂O₂ Electrosynthesis using Cobalt-Coordinated Nanocellulose Electrocatalyst.

Area of Science:

• Materials Science
• Electrochemistry
• Environmental Science

Background:

• Nonrenewable fossil fuels face cost, supply, and environmental challenges.
• Biomass conversion into advanced electrocatalysts offers a sustainable alternative.
• Hierarchical biomass structures can be engineered for enhanced catalytic properties.

Purpose of the Study:

• To develop a cost-effective cobalt-coordinated nanocellulose (CNF) strategy for high-performance electrocatalysts.
• To engineer a hybrid ZIFs-CNF architecture for efficient oxygen reduction reaction (ORR).
• To investigate the application of the novel electrocatalyst in hydrogen peroxide electrosynthesis and organic pollutant degradation.

Main Methods:

• A coordination and pyrolysis process was employed to create a hybrid ZIFs-CNF architecture.
• Nanostructured Co3O4 was anchored with CNF-based biochar to create oxygen-capturing active sites.
• The electrocatalyst's performance was evaluated for hydrogen peroxide (H2O2) electrosynthesis and organic pollutant decomposition.

Main Results:

• The Co-CNF electrocatalyst demonstrated significant oxygen-capturing active sites, enhancing O2 mass and electron transfer.
• Exceptional H2O2 electrosynthesis efficiency of approximately 510.58 mg L−1 cm−2 h−1 was achieved.
• The electrocatalyst, combined with a stainless steel mesh cathode, achieved up to 99.43% organic pollutant removal within 30 minutes.

Conclusions:

• The Co-CNF strategy provides a high-performance, cost-effective electrocatalyst derived from biomass.
• This approach offers a sustainable and eco-friendly solution for hydrogen peroxide production and environmental remediation.
• The engineered hybrid architecture significantly improves catalytic efficiency and pollutant degradation capabilities.