Understanding competition between CO2 reduction and hydrogen evolution on a gold electrode
a Leiden University, Leiden Institute of Chemistry, Leiden, 2300, Netherlands
Proceedings of International Conference on Electrocatalysis for Energy Applications and Sustainable Chemicals (EcoCat)
Online, Spain, 2020 November 23rd - 25th
Organizers: Ward van der Stam, Marta Costa Figueiredo, Sixto Gimenez Julia, Núria López and Bastian Mei
Keynote, Marc Koper, presentation 023
Publication date: 6th November 2020
Publication date: 6th November 2020
Understanding competition between CO2 reduction and hydrogen evolution on a gold electrode
In this talk I will summarize our recent efforts in understanding the competition between CO2 reduction and hydrogen evolution on a gold electrode, as studied by rotating ring-disk voltammetry and online Differential Electrochemical Mass Spectrometry. I will show that in neutral media, this competition is extremely sensitive to the electrolyte composition and mass transport conditions. I will also show how by carefully adjusting the CO2 reduction rate to the proton diffusion rate, one can effectively suppress hydrogen evolution in acidic media.
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