Iffelsberger, Christian and Wert, Stefan and Matysik, Frank-Michael and Pumera, Martin (2021) Catalyst Formation and In Operando Monitoring of the Electrocatalytic Activity in Flow Reactors. ACS APPLIED MATERIALS & INTERFACES, 13 (30). pp. 35777-35784. ISSN 1944-8244, 1944-8252
Full text not available from this repository. (Request a copy)Abstract
Flow reactors are of increasing importance and have become crucial devices due to their wide application in chemical synthesis, electrochemical hydrogen evolution reaction (HER), or electrochemical waste water treatment. In many of these applications, catalyst materials such as transition-metal chalcogenides (TMCs) for the HER, provide the desired electrochemical reactivity for the HER. Generally, the flow electrolyzers' performance is evaluated as the overall output, but the decrease in activity of the electrolyzer is due to localized failure of the catalyst. Herein, we present a method for the spatially resolved (tens of micrometers) In Operando analysis of the catalytic activity under real operation conditions as well as the localized deposition of the catalyst in an operating model flow reactor. For these purposes, scanning electrochemical microscopy was applied for MoSx catalyst deposition and for localized tracking of the TMC activity with a resolution of 25 mu m. This approach offers detailed information about the catalytic performance and should find broad application for the characterization and optimization of flow reactor catalysis under real operational conditions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCANNING ELECTROCHEMICAL MICROSCOPY; LOCAL DEPOSITION; EVOLUTION; GROWTH; electrochemical additive manufacturing; electrodeposition; hydrogen evolution reaction; transition-metal chalcogenides; hydrodynamic scanning electrochemical microscopy |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Instrumentelle Analytik (Prof. Frank-Michael Matysik) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Sep 2022 07:06 |
| Last Modified: | 13 Sep 2022 07:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/47801 |
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