Combining Nanoconfinement in Ag Core/Porous Cu Shell Nanoparticles with Gas Diffusion Electrodes for Improved Electrocatalytic Carbon Dioxide Reduction
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
ChemElectroChem
Abstract
Bimetallic silver-copper electrocatalysts are promising materials
for electrochemical CO2 reduction reaction (CO2RR) to fuels and
multi-carbon molecules. Here, we combine Ag core/porous Cu
shell particles, which entrap reaction intermediates and thus
facilitate the formation of C2+ products at low overpotentials,
with gas diffusion electrodes (GDE). Mass transport plays a
crucial role in the product selectivity in CO2RR. Conventional Hcell
configurations suffer from limited CO2 diffusion to the
reaction zone, thus decreasing the rate of the CO2RR. In
contrast, in the case of GDE-based cells, the CO2RR takes place
under enhanced mass transport conditions. Hence, investigation
of the Ag core/porous Cu shell particles at the same
potentials under different mass transport regimes reveals: (i) a
variation of product distribution including C3 products, and (ii) a
significant change in the local OH- activity under operation.
Description
Keywords
Nanoconfinement, Ag Core/Porous Cu Shell Nanoparticles, Gas Diffusion Electrodes, Electrocatalytic Carbon Dioxide
Citation
Junqueira, J. R., O'Mara, P. B., Wilde, P., Dieckhöfer, S., Benedetti, T. M., Andronescu, C., ... & Schuhmann, W. (2021). Combining Nanoconfinement in Ag Core/Porous Cu Shell Nanoparticles with Gas Diffusion Electrodes for Improved Electrocatalytic Carbon Dioxide Reduction. ChemElectroChem, 8(24), 4848-4853. doi.org/10.1002/celc.202100906