| 초록 |
Electrochemically converting carbon dioxide into valuable chemicals and fuels such as formate, carbon monoxide, methane, ethylene and ethanol represents a promising strategy to reduce carbon emission and to store electric energy as a chemical form toward carbon-neutral cycles. The carbon dioxide reduction reactions in aqueous electrolytes has multiple reaction pathways and related intermediates that are involved in the reactions simultaneously. In addition, hydrogen evolution reaction always occurs vigorously from proton reduction and water reduction. More importantly, the binding energies of the involved intermediates are interrelated, e.g. scaling relation which limits the utilization of single transition metals and motivate researchers to develop advanced materials with proper binding characters for intermediates. In this regard, delicate control of electrocatalysts and catalyst-electrolyte interfaces is required to achieve high product selectivity with low overpotential and high stability. Here, recently reported strategies for efficient production of formate, carbon monoxide and ethylene are comprehensively introduced, focusing on the design of metal-oxide interfaces and electrode structures as well as electrolysis methods. |
