Highly Selective Methanol Synthesis Using Electrochemical CO₂ Reduction with Defect-Engineered Cu₅₈ Nanoclusters.

Area of Science:

• Materials Science
• Catalysis
• Electrochemistry

Background:

• Atomically precise copper nanoclusters (Cu NCs) are promising catalysts for CO2 electroreduction.
• Current Cu NCs have limitations in product selectivity.
• Engineering active sites is crucial for enhancing catalytic performance.

Purpose of the Study:

• To enhance the catalytic activity and product selectivity of Cu NCs for CO2 electroreduction.
• To introduce defects on cubic Cu NCs by creating surface ligand vacancies.
• To investigate the impact of structural modifications on catalytic outcomes.

Main Methods:

• Synthesized cubic Cu NCs with engineered active sites.
• Introduced defects via partial dislocation of Cu atoms, creating ligand vacancies.
• Utilized Density Functional Theory (DFT) calculations to analyze catalytic mechanisms.
• Correlated structural changes with product selectivity in CO2 electroreduction.

Main Results:

• Defect engineering on cubic Cu NCs altered internal cationic geometry and cuprophilic interactions.
• Modified Cu(I) arrangements at edges and vertices influenced product specificity.
• Achieved enhanced selectivity for methanol (CH3OH) production in a specific Cu NC structure.
• DFT calculations identified increased reactivity of edge Cu atoms for CO and CHO intermediate binding.

Conclusions:

• Tailored structural designs of atomically precise nanocatalysts can direct CO2 electroreduction.
• Defect engineering in Cu NCs offers a strategy to achieve unconventional products.
• This approach holds potential for developing advanced catalysts for CO2 conversion.