Strain Engineering of Cu₂O@C₂N for Enhanced Methane-to-Methanol Conversion

Area of Science:

• Materials Science
• Catalysis
• Computational Chemistry

Background:

• Methane monooxygenase inspires biomimetic catalysts.
• Developing efficient C1 activation catalysts is crucial for sustainable chemistry.

Purpose of the Study:

• To design and investigate a stable, enzyme-like catalyst (Cu2O@C2N) for methanol formation.
• To explore the effects of strain engineering on catalytic activity and reaction mechanisms.

Main Methods:

• Density Functional Theory (DFT) calculations were used to study reaction mechanisms and energy barriers.
• Systematic investigation of concerted and radical-rebound pathways.
• Strain engineering (biaxial strain) was applied to modulate catalyst properties.

Main Results:

• The Cu2O@C2N catalyst demonstrated strong electronic coupling favorable for methanol formation.
• The concerted pathway was energetically preferred over the radical-rebound pathway.
• 1% tensile strain reduced the overall energy barrier to 1.31 eV, showing a volcano-like trend.
• N2O regeneration confirmed strain-responsive kinetics.

Conclusions:

• Geometric confinement and mechanical modulation synergistically enhance catalytic performance.
• Strain engineering offers a rational design strategy for advanced C1 activation catalysts.
• The electronic descriptor Δε effectively captures the structure-activity relationship.