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

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 umol 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.

 Autoría: Merino-Garcia I., Albo J., Solla-Gullón J., Montiel V., Irabien A.,

 Fuente: Journal of CO2 Utilization, 2019, 31, 135-142

Editorial: Elsevier

 Fecha de publicación: 01/05/2019

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.jcou.2019.03.002

ISSN: 2212-9820,2212-9839

 Proyecto español: CTQ2016-76231-C2-1-R ; CTQ2016-76231-C2-2-R

Url de la publicación: https://doi.org/10.1016/j.jcou.2019.03.002