Fixation of CO₂ by Electrocatalytic Reduction and Electropolymerization in Ionic Liquid–H₂O Solution

Abstract

The electrocatalytic synthesis of low-density polyethylene (LDPE) from carbon dioxide on a nanostructured (ns)TiO2 film electrode was investigated by controlled potential electrolysis in a solvent mixture of water and the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMI]BF4) at room temperature under ambient pressure. Under these conditions, the nsTiO2 film is remarkably efficient and selective for the electroreduction of CO2. The current efficiency for the formation of the electrolytic product is about 8-14% at -1.50 V (vs SCE). The electrocatalytic activity of the electrode in the electrochemical reduction of CO2 was investigated by cyclic voltammetry (CV), and the probable electrode reaction mechanism is discussed.

A Metal–Organic Framework as an Electrocatalyst for Ethanol Oxidation

“…This behavior confirms that the catalytic reaction is a fast reaction. [19] In conclusion, this work demonstrates the first example of the utilization of a noble-metal-free MOF material, [(HOC 2 H 4 ) 2 dtoaCu], as an electrocatalyst for EER. Although ethanol is only partially oxidized to acetaldehyde under the present conditions, the performance in terms of oxidation potential and current density is comparable with Pt-based catalysts.…”

Ionic Liquids and Dense Carbon Dioxide: A Beneficial Biphasic System for Catalysis

“…209 4 ] containing water were investigated as electrolytes, with the result that the latter appeared to be more suitable, as the catalytic activity was higher when water was present. For this study, the IL was chosen not only for its electrolytic properties but also (even mainly) because it would maintain a high CO 2 concentration at the electrode surface.…”

Electroreduction of CO2 into Ethanol over an Active Catalyst: Copper Supported on Titania

“…Cueto and Hirata [17] prepared a TiO 2 -indium-tin oxide thin-film glass electrode via a fixed-potential bulk electrolysis process, in which 1-butyl-3-methylimidazolium tetrafluoroborate (BMImBF 4 , an ionic liquid) was used as both solvent and supporting electrolyte. In addition, TiO 2 acts as a redox electron carrier that facilitates various reduction reactions, which include CO 2 conversion [18,19]. The TiO 2 surface assists in CO 2 adsorption to stabilize the intermediate of CO 2 electroreduction and reduces the overpotential [20,21].…”