Unveiling the Potential of Covalent Organic Framework Electrocatalyst for Enhanced Oxygen Evolution

Area of Science:

• Materials Science
• Electrochemistry
• Sustainable Energy

Background:

• Covalent Organic Frameworks (COF) show promise for various applications, including catalysis.
• The oxygen evolution reaction (OER) is crucial for sustainable energy technologies like water splitting.
• Developing efficient electrocatalysts for OER under alkaline conditions is a key challenge.

Purpose of the Study:

• To develop a highly active electrocatalyst for the oxygen evolution reaction (OER) using Covalent Organic Frameworks (COF).
• To enhance the electrocatalytic activity of COF through post-alteration plasma modification.
• To investigate the effect of plasma treatment parameters on OER performance.

Main Methods:

• Synthesized and modified Covalent Organic Frameworks (COF) using plasma treatment.
• Investigated the influence of plasma treatment voltage and duration on COF properties.
• Evaluated the electrocatalytic activity of the modified COF for the oxygen evolution reaction (OER) in alkaline media.
• Characterized the performance using overpotential and Tafel slope measurements.

Main Results:

• Plasma-treated COF (PT-30 COF) exhibited significantly enhanced OER activity compared to pristine COF.
• Optimized plasma treatment (30 min, 6 kV) resulted in the lowest overpotential (390 mV) and Tafel slope (69 mV.dec⁻¹).
• Pristine COF showed a higher overpotential (652 mV) and Tafel slope (235 mV.dec⁻¹).

Conclusions:

• Post-alteration plasma modification is an effective strategy to create highly active electrocatalysts from COF for OER.
• The developed COF-based electrocatalyst shows great potential for efficient water splitting and sustainable energy applications.
• This method offers a pathway for functionalizing COF materials for advanced catalytic applications.