Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids

Silvia Mena; Esteve Ribas; Clara Richart; Iluminada Gallardo; Jordi Faraudo; Scott K Shaw; Gonzalo Guirado

doi:10.1016/j.jelechem.2021.115411

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Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids

Journal article

Peer reviewed

Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids

Silvia Mena, Esteve Ribas, Clara Richart, Iluminada Gallardo, Jordi Faraudo, Scott K Shaw and Gonzalo Guirado

Journal of electroanalytical chemistry (Lausanne, Switzerland), Vol.895, p.115411

08/15/2021

DOI: 10.1016/j.jelechem.2021.115411

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Abstract

[Display omitted] Carbon dioxide (CO2) plays a key role in controlling the temperature of the Earth. But the increase in the concentration of CO2 in the atmosphere brings with it a series of consequences, originating several environmental problems. The use of electrochemical, spectroscopic and molecular dynamics techniques are useful toolkits to valorize carbon dioxide, and to know the reduction mechanism as a function of CO2 concentration, the cathode nature, and the electrolyte. This manuscript will be mainly centered in the use of ionic liquids (IL) for efficient CO2 capture and valorization into different valuable products thanks to the CO2 electrochemical reduction. In this sense, spectroelectrochemistry based on cyclic voltammetry coupled with Polarization Modulation-Infrared Reflection-Absorption Spectroscopy (PM-IRRAS) and Infrared Reflection-Absorption Spectroscopy (IRRAS) appear to be an efficient instrument to follow the CO2 reactivity in imidazolium ionic liquids. Finally, we present molecular dynamics paired with cyclic voltammetry in order to calculate the diffusion coefficient of CO2 and the number of electrons involved in its reduction process, respectively. Therefore, the current research opens the door to the use of theoretical-experimental approaches altogether to determine how is the CO2 reduction mechanism. The CO2 reduction products in function of the solvent and nature of the cathode is suggested, proving that the product obtained from the electrochemical reduction of CO2 depends on the electrode material and the solvent.

Carbon dioxide

Electrochemistry

Ionic liquids

Reduction Mechanism

Details

Title: Subtitle: Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids
Creators: Silvia Mena - Departament de Química, Universitat Autònoma de Barcelona (UAB), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain
Esteve Ribas - Departament de Química, Universitat Autònoma de Barcelona (UAB), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain
Clara Richart - Departament de Química, Universitat Autònoma de Barcelona (UAB), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain
Iluminada Gallardo - Departament de Química, Universitat Autònoma de Barcelona (UAB), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain
Jordi Faraudo - Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Spain
Scott K Shaw - Department of Chemistry, University of Iowa, Iowa City, IA 52242, United States
Gonzalo Guirado - Departament de Química, Universitat Autònoma de Barcelona (UAB), Campus de la UAB, 08193 Bellaterra, Barcelona, Spain
Resource Type: Journal article
Publication Details: Journal of electroanalytical chemistry (Lausanne, Switzerland), Vol.895, p.115411
DOI: 10.1016/j.jelechem.2021.115411
ISSN: 1572-6657
eISSN: 1873-2569
Publisher: Elsevier B.V
Grant note: DOI: 10.13039/501100011033, name: Agencia Estatal de Investigación
Language: English
Date published: 08/15/2021
Academic Unit: Chemistry
Record Identifier: 9984216692802771

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