Glycine modified copper promotes CO₂ electroreduction to multi-carbon products: a computational study

Area of Science:

• Electrochemistry
• Materials Science
• Computational Chemistry

Background:

• Electrocatalytic CO2 reduction is crucial for sustainable energy.
• Molecular modification offers a promising strategy to enhance catalyst performance.
• Copper-based catalysts are widely studied for CO2 electroreduction.

Purpose of the Study:

• To investigate the mechanism of CO2 electroreduction on glycine-modified copper.
• To understand how molecular modification influences the reaction pathway and energy landscape.
• To provide insights into designing improved electrocatalysts for CO2 conversion.

Main Methods:

• Density Functional Theory (DFT) calculations were employed.
• The reaction mechanism and energy profiles for CO2 electroreduction on modified copper were simulated.
• Interactions between glycine, CO2, and reaction intermediates were analyzed.

Main Results:

• Glycine modification significantly impacts the CO2 electroreduction mechanism on copper.
• The interaction between glycine and reaction intermediates alters the activation energy barriers.
• Specific adsorption configurations of intermediates on the modified surface were identified.

Conclusions:

• Molecular modification, specifically with glycine, can tune the electrocatalytic activity of copper for CO2 reduction.
• Understanding intermediate-surface interactions is key to designing efficient electrocatalysts.
• This study provides a theoretical basis for developing novel molecularly modified electrocatalysts for CO2 utilization.