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Monday, October 5, 2020 at 9:00am to 10:00amVirtual Event
Quantifying the Interfacial Electric Field at the Electrode-Electrolyte Interface
The transformation of chemical compounds on charged interfaces plays an indispensable role in electrochemical energy storage devices. Yet, very little is known about the interfacial electric field and how it supports the electrochemical reactions. In this talk, I will discuss an example of how the interfacial electric field impacts the electrochemical transformation and our effort to quantify this effect using phase-sensitive second-harmonic generation (PS-SHG). As a second-order nonlinear spectroscopy, PS-SHG provides interface-specific information, including the interfacial electric field. We use PS-SHG and electrochemical quantifications to show that the interfacial electric field can modify the adsorption of a reaction intermediate in an electrochemical reaction. We further found that it is possible to measure the potential of zero charge if one can obtain the absolute phase of the complex nonlinear susceptibilities of a material.
BIO: Jin Suntivich is an Associate Professor in Materials Science and Engineering at Cornell University. His research focuses on building the structure-property relations for materials in electrochemical energy storage devices. His goal is to rationally design materials that can support electrochemical reactions with faster and more selective kinetics. Jin received his B.S. in Materials Science and Engineering and B.A. in Integrated Science from Northwestern, and his doctorate in Materials Science and Engineering from MIT. Prior to Cornell, Jin was a postdoctoral fellow at the Center for the Environment at Harvard.
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Meeting ID: 944 5891 9045