Electrocatalytic interfaces are vital in electrifying chemical synthesis and energy conversion. However, the interfacial structures are complex and dynamic, making it challenging to elucidate the structure-activity relationship. In this talk, I will discuss our efforts in method development to reveal the electrical double layer effect in electrocatalysis. Specifically, scanning electrochemical probe microscopic methods have been developed to probe the distribution of local potential of zero charge (PZC) at the electrochemical interfaces, which miniaturizes the bulk immersion methods. The facet-dependent PZC is readily observed on different grains of Pt and Au polycrystalline electrodes. The method allows for revealing the correlation between the electrical double layer property and the electrocatalytic activity at the sub-micron scale, which can be potentially used in real complex electrocatalytic systems.

Probing the interfacial processes in electrocatalysis via nanoelectrochemistry tools

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ACS Spring 2023

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