| Autor: |
Manolova, Mila, Freudenberger, Renate, Hildebrand, Joachim, Klemm, Elias, Bienen, Fabian, Kopljar, Dennis, Wagner, Norbert |
| Rok vydání: |
2021 |
| Předmět: |
|
| DOI: |
10.5281/zenodo.4550670 |
| Popis: |
The electrochemical reduction of CO2 to diverse useful chemical products is a promising way to transform chemical industry to CO2-neutral production. The gas diffusion electrodes (GDE), which enhance the gas/liquid and the liquid/solid interface tremendously, are very suitable for the CO2 electroreduction. Even if no real contact of all three phases – gas, liquid, solid – occurs it is often referred to as triple-phase-boundary (TPB). This term will also used throughout this paper because even if not entirely correct it is well-established in literature. The high diffusivity of gaseous CO2 and shorter diffusion lengths of solved CO2 in such electrodes enable the utilization of high process current densities. Tin based catalysts are of interest for CO2 electroreduction due to the low cost, non-toxic properties and ability to produce formic acid/formate at high selectivity. In this presentation we will show the electrochemical deposition of Sn onto commercial and in-house fabricated carbon based GDEs from different electrolytes. Focused ion beam (FIB) etching was utilized to build a 3D model of the porous GDE. Scanning electron micrographs (SEM) of the electrodeposits showed that different layer morphologies are attainable by changing the deposition mode. A new method was developed for cleaning the GDE after electrochemical deposition. The distribution of Sn throughout the thickness of the GDE was investigated with computer tomography (CT). The initial electrochemical characterization tests of the Sn-loaded GDE, under laboratory operating conditions demonstrated promising results. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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