Title Gas-phase electrocatalytic conversion of CO2 to chemicals on sputtered Cu and Cu-C catalysts electrodes
Authors Gutierrez-Guerra, N. , Gonzalez, J. A. , SERRANO RUIZ, JUAN CARLOS, Lopez-Fernandez, E. , Valverde, J. L. , de Lucas-Consuegra, A.
External publication No
Means J. Energy Chem.
Scope Article
Nature Científica
JCR Quartile 1
SJR Quartile 1
JCR Impact 7.21600
SJR Impact 1.59100
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85047557984&doi=10.1016%2fj.jechem.2018.05.005&partnerID=40&md5=9e355853369d42d4956e64d90ffecead
Publication date 01/04/2019
ISI 000460174000007
Scopus Id 2-s2.0-85047557984
DOI 10.1016/j.jechem.2018.05.005
Abstract A novel gas-phase electrocatalytic cell containing a low-temperature proton exchange membrane (PEM) was developed to electrochemically convert CO2 into organic compounds. Two different Cu-based cathode catalysts (Cu and Cu-C) were prepared by physical vapor deposition method (sputtering) and subsequently employed for the gas-phase electroreduction of CO2 at different temperatures (70-90 degrees C). The prepared electrodes Cu and Cu-C were characterized by X-ray diffraction (XRD), X-ray photoemission spectroscopy (XPS) and scanning electron microscopy (SEM). As revealed, Cu is partially oxidized on the surface of the samples and the Cu and Cu-C cathodic catalysts were comprised of a porous, continuous, and homogeneous film with nanocrystalline Cu with a grain size of 16 and 8 nm, respectively. The influence of the applied current and temperature on the electro-catalytic activity and selectivity of these materials was investigated. Among the two investigated electrodes, the pure Cu catalyst film showed the highest CO2 specific electrocatalytic reduction rates and higher selectivity to methanol formation compared to the Cu-C electrode, which was attributed to the higher particle size of the former and lower CuO/Cu ratio. The obtained results show potential interest for the possible use of electrical renewable energy for the transformation of CO2 into valuable products using low metal loading Cu based electrodes (0.5 mg Cu cm(-2)) prepared by sputtering. (C) 2018 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
Keywords CO2 valorization; Electro-reduction; Cu catalyst; PEM; Selectivity; Methanol production
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