Advancing integrated CO₂ electrochemical conversion with amine-based CO₂ capture: a review

Abstract

Carbon dioxide (CO2) electrolysis is a promising route to utilise captured CO2 as a building block to produce valuable feedstocks and fuels such as carbon monoxide and ethylene. Very recently,...

Heteroatom-doped transition metal hydroxides in energy storage and conversion: a review

“…7 The electrocatalytic reduction of CO 2 reaction (CO 2 RR) to produce a liquid fuel can not only alleviate the energy crisis but also solve the environmental problems caused by the greenhouse effect. 8 However, numerous obstacles remain in the development of energy storage devices. Normally, conventional Li batteries have relatively low ionic resistance, leading to some drawbacks such as safety issues and insufficient lifetime.…”

“…7 The electrocatalytic reduction of CO 2 reaction (CO 2 RR) to produce a liquid fuel can not only alleviate the energy crisis but also solve the environmental problems caused by the greenhouse effect. 8…”

Energy comparison of sequential and integrated CO2 capture and electrochemical conversion

“…Similar to the gas-fed CO 2 electroreduction, hydroxide ions should also be produced at the catalyst surface as a by-product of water reduction and increase the pH locally around the electrode 69 . A prior report 70 has shown that the addition of a strong base (e.g., sodium hydroxide) to the CO 2 -amine system could result in the formation of free amines and carbonate at the end equivalent points.…”

Energy comparison of sequential and integrated CO2 capture and electrochemical conversion

“…Similar to the gas-fed CO 2 electroreduction, hydroxide ions should also be produced at the catalyst surface as a by-product of water reduction and increase the pH locally around the electrode. 70 A prior report 71 has shown that the addition of a strong base (e.g., sodium hydroxide) to the CO 2 -amine system could result in the formation of free amines and carbonate at the end equivalent points. As such, we could anticipate the formation of carbonate ions close to the electrode surface from the reactions between the hydroxide ions and unreacted CO 2 species.…”