| Autor: |
Huq, Faria, Sanjuán, Ignacio, Baha, Sabrina, Braun, Michael, Kostka, Aleksander, Chanda, Vimanshu, Junqueira, João R. C., Sikdar, Nivedita, Ludwig, Alfred, Andronescu, Corina |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Popis: |
Gas diffusion electrodes (GDE) obtained by sputtering metal films on polytetrafluoroethylene (PTFE) membranes are among the most performant electrodes used to electrochemically reduce CO₂. The present work reveals several essential aspects for fabricating performant PTFE-based gas diffusion electrodes (GDEs) for CO₂ electroreduction (CO₂R). We show that adding an additive layer (a mixture of carbon and Nafion™ or Nafion™ only) is required for stabilizing the metal catalyst film (Cu), deposited via sputtering on the PTFE membrane, during the CO₂R experiments. We found that the PTFE membrane thickness used in the GDE fabrication plays an essential role in electrode performance. The quantification of the products formed during the CO₂R conducted in a flow-cell electrolyzer revealed that on thinner membranes, CO₂R is the dominant process while on thicker ones, the H₂ formation is promoted. Thus, the PTFE membrane influences the CO₂ transport to the catalyst layer and can be used to promote the CO₂R while maintaining a minimum H₂ production. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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