Maximizing Ag Utilization in High-Rate CO2 Electrochemical Reduction with a Coordination Polymer-Mediated Gas Diffusion Electrode
Smith, Wilson A.
KAUST DepartmentCatalysis for Energy Conversion (CatEC)
Chemical Engineering Program
Chemical Science Program
KAUST Catalysis Center (KCC)
King Abdullah University of Science and Technology, KAUST Catalysis Center, Advanced Catalytic Materials, Thuwal 23955, Saudi Arabia
Physical Science and Engineering (PSE) Division
Embargo End Date2020-07-29
Permanent link to this recordhttp://hdl.handle.net/10754/656537
MetadataShow full item record
Abstracte report the preparation and electrocatalytic performance of silver-containing gas diffusion electrodes (GDEs) derived from a silver coordination polymer (Ag-CP). Layer-by-layer growth of the Ag-CP onto porous supports was applied to control Ag loading. Subsequent electro-decomposition of the Ag-CP resulted in highly selective and efficient CO2-to-CO GDEs in aqueous CO2 electroreduction. Afterward, the metal–organic framework (MOF)-mediated approach was transferred to a gas-fed flow electrolyzer for high current density tests. The in situ formed GDE, with a low silver loading of 0.2 mg cm–2, showed a peak performance of jCO ≈ 385 mA cm–2 at around −1.0 V vs RHE and stable operation with high FECO (>96%) at jTotal = 300 mA cm–2 over a 4 h run. These results demonstrate that the MOF-mediated approach offers a facile route for manufacturing uniformly dispersed Ag catalysts for CO2 electrochemical reduction by eliminating ill-defined deposition steps (drop-casting, etc.) while allowing control of the catalyst structure through self-assembly.
CitationWang, R., Haspel, H., Pustovarenko, A., Dikhtiarenko, A., Russkikh, A., Shterk, G., … Gascon, J. (2019). Maximizing Ag Utilization in High-Rate CO2 Electrochemical Reduction with a Coordination Polymer-Mediated Gas Diffusion Electrode. ACS Energy Letters, 2024–2031. doi:10.1021/acsenergylett.9b01509
SponsorsThe authors thank China Scholarship Council (CSC) and TOTAL for financial support.
PublisherAmerican Chemical Society (ACS)
JournalACS Energy Letters