Weber, Nils ; Linkhorst, John ; Keller, Robert ; Wessling, Matthias (2023)
Tailoring Pore Networks – Gas Diffusion Electrodes via Additive Manufacturing.
In: Advanced Materials Technologies
doi: 10.1002/admt.202300720
Article, Bibliographie
Abstract
Additive manufacturing (AM) is a promising alternative to conventional electrode production due to its high freedom of design, excellent reproducibility, and a manifold choice of metals serving as substrates or even electrocatalysts in various electrochemical reactions. Nonetheless, porous gas diffusion electrodes (GDEs) have not been fabricated by AM due to the required resolution of the pore network in the micron to submicron range. Herein, the single-step fabrication of GDEs via AM is demonstrated for the first time. Selective laser melting is used to control the porosity, the pore diameter, and the electrochemically active surface area of the generated pore network by engineering the laser hatching strategy. In this way, the electrocatalytic activity of the fabricated GDEs is tuned for CO2 electroreduction. The CO2 reduction reaction is amplified whilst the competing hydrogen evolution reaction is mitigated at high current densities of 100 mA cm-2. The presented method is a step further towards the production of next-generation electrodes with tailored gas diffusion layers, thereby boosting electrode performance in a wide range of electrochemical applications.
| Item Type: | Article |
|---|---|
| Erschienen: | 2023 |
| Creators: | Weber, Nils ; Linkhorst, John ; Keller, Robert ; Wessling, Matthias |
| Type of entry: | Bibliographie |
| Title: | Tailoring Pore Networks – Gas Diffusion Electrodes via Additive Manufacturing |
| Language: | English |
| Date: | 2023 |
| Publisher: | Wiley |
| Journal or Publication Title: | Advanced Materials Technologies |
| DOI: | 10.1002/admt.202300720 |
| Abstract: | Additive manufacturing (AM) is a promising alternative to conventional electrode production due to its high freedom of design, excellent reproducibility, and a manifold choice of metals serving as substrates or even electrocatalysts in various electrochemical reactions. Nonetheless, porous gas diffusion electrodes (GDEs) have not been fabricated by AM due to the required resolution of the pore network in the micron to submicron range. Herein, the single-step fabrication of GDEs via AM is demonstrated for the first time. Selective laser melting is used to control the porosity, the pore diameter, and the electrochemically active surface area of the generated pore network by engineering the laser hatching strategy. In this way, the electrocatalytic activity of the fabricated GDEs is tuned for CO2 electroreduction. The CO2 reduction reaction is amplified whilst the competing hydrogen evolution reaction is mitigated at high current densities of 100 mA cm-2. The presented method is a step further towards the production of next-generation electrodes with tailored gas diffusion layers, thereby boosting electrode performance in a wide range of electrochemical applications. |
| Uncontrolled Keywords: | CO2 reduction, copper 3D printing, electrosynthesis, hollow fiber electrodes, porosity, selective laser melting |
| Divisions: | 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Chair for Process Engineering of Electrochemical Systems |
| Date Deposited: | 13 Sep 2023 11:13 |
| Last Modified: | 13 Sep 2023 11:13 |
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