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Monitoring surface dynamics of electrodes during electrocatalysis using in situ synchrotron FTIR spectroscopy
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Monitoring surface dynamics of electrodes during electrocatalysis using in situ synchrotron FTIR spectroscopy
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Journal Article
Monitoring surface dynamics of electrodes during electrocatalysis using in situ synchrotron FTIR spectroscopy
2023
Overview
Monitoring the surface dynamics of catalysts under working conditions is important for a deep understanding of the underlying electrochemical mechanisms towards efficient energy conversion and storage. Fourier transform infrared (FTIR) spectroscopy with high surface sensitivity has been considered as a powerful tool for detecting surface adsorbates, but it faces a great challenge when being adopted in surface dynamics investigations during electrocatalysis due to the complication and influence of aqueous environments. This work reports a well designed FTIR cell with tunable micrometre‐scale water film over the surface of working electrodes and dual electrolyte/gas channels for in situ synchrotron FTIR tests. By coupling with a facile single‐reflection infrared mode, a general in situ synchrotron radiation FTIR (SR‐FTIR) spectroscopic method is developed for tracking the surface dynamics of catalysts during the electrocatalytic process. As an example, in situ formed key *OOH is clearly observed on the surface of commercial benchmark IrO2 catalysts during the electrochemical oxygen evolution process based on the developed in situ SR‐FTIR spectroscopic method, which demonstrates its universality and feasibility in surface dynamics studies of electrocatalysts under working conditions. A novel bifunctional in situ Fourier transform infrared (FTIR) cell has been elaborately designed and prepared. By coupling with single‐reflection infrared mode, a facile and general in situ synchrotron FTIR spectroscopic method has been developed based on the FTIR cell for surface dynamic studies of electrodes during electrolysis.
Publisher
International Union of Crystallography (IUCr),International Union of Crystallography,John Wiley & Sons, Inc
