Cu oxide/ZnO-based surfaces for a selective ethylene production from gas-phase CO2 electroconversion

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Title: Cu oxide/ZnO-based surfaces for a selective ethylene production from gas-phase CO2 electroconversion
Authors: Merino-Garcia, Ivan | Albo, Jonathan | Solla-Gullón, José | Montiel, Vicente | Irabien, Ángel
Research Group/s: Electroquímica Aplicada y Electrocatálisis
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: CO2 utiliation | Gas-phase CO2 electroreduction | Ethylene | Cu oxides/ZnO-based electrodes
Knowledge Area: Química Física
Issue Date: May-2019
Publisher: Elsevier
Citation: Journal of CO2 Utilization. 2019, 31: 135-142. doi:10.1016/j.jcou.2019.03.002
Abstract: In this work, the application of Cu oxides/ZnO-based electrocatalytic surfaces for the continuous and selective gas-phase electroreduction of CO2 to ethylene in a filter-press type electrochemical cell is studied. The prepared catalytic materials are characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Then, the Cu oxides/ZnO-based gas diffusion electrodes are electrochemically characterized by cyclic voltammetry and Tafel plot analyses. The ethylene formation rate and Faradaic efficiency are as high as 487.9 μmol m−2s−1 and 91.1% when a current density of 7.5 mAcm−2 (-2.5 V vs. Ag/AgCl) is applied to the system, with an ethylene/methane production ratio of 139, showing a better performance than previous electrocatalytic systems for the production of ethylene from CO2 conversion. Consequently, the use of Cu oxides/ZnO-based electrocatalysts for gas-phase CO2 reduction is a step forward in the production of C2 products, such as ethylene.
Sponsor: The authors gratefully acknowledge the financial sources from the Spanish Ministry of Economy and Competitiveness (MINECO), through the projects CTQ2016-76231-C2-1-R (AEI/FEDER, UE) and CTQ2016-76231-C2-2-R (AEI/FEDER, UE). Besides, I.M.-G. and J.A. would also like to thank the MINECO for the postdoctoral period of the predoctoral research contract (BES-2014-070081) and Ramón y Cajal programme (RYC-2015-17080), respectively. J.S-G. also acknowledges financial support from VITC (Vicerrectorado de Investigación y Transferencia de Conocimiento) of the University of Alicante (UATALENTO16-02).
ISSN: 2212-9820 (Print) | 2212-9839 (Online)
DOI: 10.1016/j.jcou.2019.03.002
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2019 Elsevier Ltd.
Peer Review: si
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