期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 30, 页码 35777-35784出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c09127
关键词
electrochemical additive manufacturing; electrodeposition; hydrogen evolution reaction; transition-metal chalcogenides; hydrodynamic scanning electrochemical microscopy
资金
- Grant Agency of the Czech Republic [GACR EXPRO: 19-26896X]
- European Union [888797]
- MEYS CR [LM2018110]
- Marie Curie Actions (MSCA) [888797] Funding Source: Marie Curie Actions (MSCA)
Flow reactors play a crucial role in chemical synthesis, electrochemical reactions, and wastewater treatment, with catalyst activity spatial analysis being important for optimization. The use of scanning electrochemical microscopy allows for localized tracking of catalytic activity with high resolution.
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.
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