The electrode/electrolyte interface plays a critical role in the performance of electrochemical energy storage and conversion devices. Understanding the structure and reaction processes at solid/liquid interface is of great importance in surface science and electrochemistry. Metalloporphyrins, a model system of the metal-organic catalysts for different electrocatalytic processes, have attracted considerable attention for the advantages of high efficiency and low cost. Understanding the catalytic role of the active sites in molecular catalysts facilitates the design of high performance metal-organic catalysts. Electrochemical scanning tunneling microscopy (ECSTM) is a powerful technique for investigating electrocatalytic reaction at solid/liquid interface at the molecular scale. In this presentation, we discuss the application of the high resolution ECSTM to study the interfacial electrochemical reactions by molecular catalysts at molecular level. The time evolution of molecular metalloporphyrins and metallophthalocyanines in several important electrocatalytic processes, such as oxygen reduction reaction, oxygen evolution reaction, can be resolved at the different potential and different electrolyte environment.

<i>In situ</i> scanning tunneling microscopy investigation of molecular electrocatalytic reactions at the electrode/electrolyte interface

2019 Fall National Meeting

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In situ scanning tunneling microscopy investigation of molecular electrocatalytic reactions at the electrode/electrolyte interface