Electrochemical Conversion of Methanol and Carbon Dioxide to Dimethyl Carbonate at Graphite-Pt Electrode System

Abstract

Electrocatalytic activation and conversion of methanol and CO 2 to dimethyl carbonate with graphite and platinum electrodes in the dialkylimidazolium ionic liquid-methanol system was conducted under ambient conditions. Among the ionic liquids screened, 1-benzyl-3-methylimidazolium chloride (BzmimCl) exhibited effective performance as a supporting electrolyte. In the process of the electrolysis, dimethyl carbonate was effectively synthesized in the absence of any other additives. Based on the electrochemical activation of the methanol on the electrode, insertion of CO 2 , CH 3 OH participating in the reaction, the electrochemical reaction mechanism proposed here is very different from those previously reported.

CO2electro-valorization to dimethyl carbonate from methanol using potassium methoxide and the ionic liquid [bmim][Br] in a filter-press electrochemical cell

“…In the past few years, the electrosynthesis of cyclic carbonates from epoxides and diols, and the production of organic carbamates from amines have been reported using ILs. The synthesis of dimethyl carbonate in the presence of ILs has also been the focus of special attention in the electrochemical field with Zhang et al and Feng and Liu, respectively, achieving 74 and 72% yields in the presence of [bmim][BF4] with a copper working electrode. To improve the yield in the same ionic liquid Feng et al and Wang et al used a nanoporous copper electrode based on platinum (NPC‐Pt) and silver (NPC‐Ag), slightly increasing the yield to 81 and 80%, respectively.…”

An Efficient Route for Electrooxidation of Methanol to Dimethoxymethane Using Ionic Liquid as Electrolyte

“…20,21 Cyclic voltammetry was carried out with a CHI620B electrochemical analyzer. Before the measurement, Pt electrodes with rectangle and surface area 0.2826 cm 2 (Pt-213, Weiye instrument factory in Shanghai) were burnished with metallographic abrasive paper [W20(02)-500 # , Shanghai grinding wheels plant], followed by washing with acetone and distilled water in turn.…”

CO2capture and electrochemical conversion using superbasic [P66614][124Triz]

“…Reports have shown that ILs can act to stabilise the first electron reduction of the physically absorbed CO 2 by complexation of the reduction product with the IL cation. [13][14][15] Further studies used hydrated ILs, to provide a source of H + , CO 2 physically absorbed within the IL was reduced with Ag as working electrode which enabled further reduction of the IL stabilised [ CO 2 ]to CO as shown in the Scheme 1. Initial CO 2 electrochemical reduction experiments in ILs employed 1-alkyl-3methylimidazolium ([C n mim] + ) based ILs with a range of non-coordinating anions such as [BF 4 ] -, Br -, Cl -.…”