Van Marum Colloquium: Imaging Electrochemical Reactions by Operando Optical Microscopy
- Thursday 19 October 2023
2333 CC Leiden
The most commonly used techniques for monitoring electrochemical reactions are based on measuring the electric current (potential) in response to an applied potential (current), such as Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS) and Chronopotentiometry (CP). These techniques can also be coupled to in situ electron microscopies and scanning probe microscopies to spatially and temporally resolve the local electrochemical properties at nanoscale. At the meantime, optical microscopy provides various advantages, including simplicity, high-throughput imaging, and high sensitivity for operando probing of local electrochemical reactions. In this presentation, I will first show how the dark-field scattering microscopy can be used to monitor redox reaction of Fe(MeOH)2 at the micro/nanoscale (inside nanoholes and around ultramicroelectrode). Secondly, I will then present how we use interferometric scattering microscopy (iSCAT) to probe hydrogen storage in Pd nanoparticles.