Abstract
Abstract Electrochemical conversion of carbon dioxide (CO2) is the most interesting way for the construction of a carbon zero society. Electrochemical reduction of CO2 using lab-made electrolytic cell and gold (Au) electrocatalyst coated on the carbon gas diffusion layer with varying surface properties was investigated on its application to selectively produce CO. Three types or carbon substrates were investigated: superhydrophobic, hydrophobic and hydrophilic substrates. Superhydrophobic carbon substrate exhibited the highest faradaic efficiency (94%) towards CO production and CO/H2 ratio (31.3), under a current density of −8.0 mA/cm2 at a cathode potential of −0.7 V (vs. RHE). As the cathode potential was decreased to −1.3 V (vs. RHE), the faradaic efficiency and CO/H2 ratio of the superhydrophobic substrate both decreased to 77% and 9.6 respectively with a current density of −25 mA/cm2. Despite the decrease, the superhydrophobic substrate still exhibited the best performance owing to the better formation of a three phase interphase at the more hydrophobic electrode.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
