Maximizing Ag Utilization in High-Rate CO2 Electrochemical Reduction with a Coordination Polymer-Mediated Gas Diffusion Electrode
| Autor: | Henrik Haspel, Alla Dikhtiarenko, Artem Russkikh, Dmitrii Osadchii, Samy Ould-Chikh, Freek Kapteijn, Riming Wang, Genrikh Shterk, Ming Ma, Alexey Pustovarenko, Wilson A. Smith, Kazuhiro Takanabe, Jorge Gascon |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
High rate
Materials science Gas diffusion electrode Renewable Energy Sustainability and the Environment Coordination polymer Energy Engineering and Power Technology 02 engineering and technology GDES 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Reduction (complexity) chemistry.chemical_compound Fuel Technology Chemical engineering chemistry Chemistry (miscellaneous) Electrode Materials Chemistry Gaseous diffusion 0210 nano-technology |
| Zdroj: | ACS Energy Letters, 4(8) |
| ISSN: | 2380-8195 |
| Popis: | We 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|