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System Design Rules for Intensifying the Electrochemical Reduction of CO 2 to CO on Ag Nanoparticles
- Source :
- ChemElectroChem. 7:2001-2011
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- Electroreduction of CO2 (eCO2RR) is a potentially sustainable approach for carbon-based chemical production. Despite significant progress, performing eCO2RR economically at scale is challenging. Here we report meeting key technoeconomic benchmarks simultaneously through electrolyte engineering and process optimization. A systematic flow electrolysis study - performing eCO2RR to CO on Ag nanoparticles as a function of electrolyte composition (cations, anions), electrolyte concentration, electrolyte flow rate, cathode catalyst loading, and CO2 flow rate - resulted in partial current densities of 417 and 866 mA/cm2 with faradaic efficiencies of 100 and 98 % at cell potentials of −2.5 and −3.0 V with full cell energy efficiencies of 53 and 43 %, and a conversion per pass of 17 and 36 %, respectively, when using a CsOH-based electrolyte. The cumulative insights of this study led to the formulation of system design rules for high rate, highly selective, and highly energy efficient eCO2RR to CO.
Details
- ISSN :
- 21960216
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- ChemElectroChem
- Accession number :
- edsair.doi.dedup.....cae354daf34b909c1fa89c7020dd4fa8
- Full Text :
- https://doi.org/10.1002/celc.202000089