Operando Electrochemical Atomic Force Microscopy of Model Electrocatalysts
Andrew Akbashev a
a Paul Scherrer Institute, OLGA/113, Villigen PSI, 5232, Switzerland
Proceedings of International Conference on Frontiers in Electrocatalytic Transformations (INTERECT22)
València, Spain, 2022 November 21st - 22nd
Organizers: Sara Barja, Nongnuch Artrith and Matthew Mayer
Invited Speaker, Andrew Akbashev, presentation 007
DOI: https://doi.org/10.29363/nanoge.interect.2022.007
Publication date: 11th October 2022

In situ characterization of electrochemical processes in model materials are central to fundamental electrochemistry as they provide precise potential-dependent quantities that can be used to accurately assess theoretical models and predictions. As such, structural evolution of materials under highly oxidizing conditions represents a particular challenge. To gain the necessary insight into the surface and bulk behavior, one should combine advanced in situ characterization techniques with well-defined materials that are essential for modeling.

In this talk, I will discuss how a combination of in situ microscopy techniques can provide insight into the surface and bulk behavior of electrocatalysts during electrocatalytic water splitting (OER). Specifically, I will show how operando electrochemical atomic force microscopy (EC-AFM) can be used to record nanoscale changes in the surface morphology during anodic corrosion of the perovskite SrIrO3 surface. I will also discuss how operando EC-AFM can be combined with other microscopy techniques to probe the evolution and reactivity of single particles of Co(OH)2. Additionally, I will briefly cover the state of the art in operando microscopy and relevant experiments for electrocatalysis.

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