Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.168
Publication date: 11th July 2022
Electrochemical CO2 reduction reaction (CO2RR) holds promise for the conversion of green electricity (e.g., solar electricity) into fuels and CO2 mitigation, to address the global warming issue. Biomass, on the other hand, is an abundant renewable energy resource with a potential to provide sustainable source of fuel. Nevertheless, CO2RR suffers from high applied potential mainly due to the inefficient oxygen evolution reaction (OER) in the counter electrode, as well as low selectivity—impeding its commercialization; and the biomass upgrading process emits significant amount of greenhouse gases—hindering its employment. Here in this work, we first design and synthesize active and selective electrocatalysts for the CO2 reduction and biomass oxidation. Combining these two reactions within one unified electrochemical system is proposed in literature to further decrease the total applied potential and improve the energy efficiency, however often the attained current density in biomass oxidation reactions (i.e., few mA/cm2) is not comparable to the commonly used OER and subsequently not suitable for the required current densities in CO2RR systems (i.e., > 100 mA/cm2). Thus, in this work, we demonstrate a feasible approach to attain an energy efficient combined electrochemical system that works at current density > 100 mA/cm2. In this talk, I will report some of our recent achievements in catalyst design for both reactions, their performance, energy efficiency improvements, and molecular understanding of the reaction mechanism. The talk will be mostly focused on CO2RR to formate and methane, and hydroxymethylfurfural (HMF) oxidation to furandicarboxylic acid (FDCA).
This work was supported by Fonds de recherche du Québec – Nature et technologies (FRQNT) Master Scholarship, FRQNT New Researchers Fund (2021-NC-283234), NSERC Discovery Grant (RGPIN-2020-04960), and Canada Research Chair (950-23288).
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