Selective carbon dioxide electroreduction to ethylene and ethanol by core-shell copper/cuprous oxide

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Carbon dioxide (CO2) utilization is crucial for mitigating climate change.
• Developing efficient catalysts for CO2 electroreduction to value-added products remains a significant challenge.

Purpose of the Study:

• To develop a novel core-shell copper catalyst (Cu@Cu2O) for enhanced CO2 electroreduction.
• To investigate the catalytic properties and stability of the Cu@Cu2O catalyst.

Main Methods:

• Fabrication of a core-shell copper catalyst with a native oxide layer (Cu@Cu2O) under ambient conditions.
• Electrochemical CO2 reduction experiments to evaluate catalyst performance.

Main Results:

• The Cu@Cu2O catalyst demonstrated stability under CO2 electroreduction conditions.
• Synergistic effects between Cu+ and Cu0 species enhanced catalytic efficiency and selectivity.
• Achieved approximately 50% selectivity for C2 products (ethylene and ethanol) at -1.0 V vs RHE.

Conclusions:

• The Cu@Cu2O core-shell catalyst is a promising material for efficient CO2 utilization.
• The catalyst's unique structure and composition contribute to its high performance in producing valuable C2 chemicals.