Title Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size
Authors de Lucas-Consuegra, Antonio, SERRANO RUIZ, JUAN CARLOS, Gutierrez-Guerra, Nuria, Luis Valverde, Jose, SERRANO RUIZ, JUAN CARLOS
External publication No
Means Catalysts
Scope Article
Nature Científica
JCR Quartile 2
SJR Quartile 2
JCR Impact 3.44400
Area International
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052542327&doi=10.3390%2fcatal8080340&partnerID=40&md5=967c4e9768e45c52c0f454d1c91a05e9
Publication date 01/08/2018
ISI 000442517100045
Scopus Id 2-s2.0-85052542327
DOI 10.3390/catal8080340
Abstract A novel gas-phase electrocatalytic system based on a low-temperature proton exchange membrane (Sterion) was developed for the gas-phase electrocatalytic conversion of CO2 to liquid fuels. This system achieved gas-phase electrocatalytic reduction of CO2 at low temperatures (below 90 degrees C) over a Cu cathode by using water electrolysis-derived protons generated in-situ on an IrO2 anode. Three Cu-based cathodes with varying metal particle sizes were prepared by supporting this metal on an activated carbon at three loadings (50, 20, and 10 wt %; 50% Cu-AC, 20% Cu-AC, and 10 % Cu-AC, respectively). The cathodes were characterized by N-2 adsorption desorption, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) and their performance towards the electrocatalytic conversion of CO2 was subsequently studied. The membrane electrode assembly (MEA) containing the cathode with the largest Cu particle size (50 %. Cu-AC, 40 nm) showed the highest CO2 electrocatalytic activity per mole of Cu, with methyl formate being the main product. This higher electrocatalytic activity was attributed to the lower Cu CO bonding strength over large Cu particles. Different product distributions were obtained over 20% Cu-AC and 10% Cu-AC, with acetaldehyde and methanol being the main reaction products, respectively. The CO2 consumption rate increased with the applied current and reaction temperature.
Keywords CO2 electroreduction; CO2 valorization; Cu catalyst; particle size; PEM; acetaldehyde production; methanol production
Universidad Loyola members