The rational design of electrochemical devices depends on the molecular understanding of the reaction processes under realistic working conditions. To gain insights into molecular adsorption/desorption on solid-liquid interfaces, highly sensitive in-situ molecular detection methods and the ability of controlling the Fermi level are required. In-operando surface-enhanced Raman scattering (EC-SERS) entails both requisites, but is diffraction limited. In contrast, electrochemical tip-enhanced Raman scattering (EC-TERS) offers unprecedented nanoscale chemical resolution of electrified solid-liquid interfaces. Here, we employ both tools, EC-SERS and EC-TERS, to study the Au oxidation/reduction, which represents a fundamental reaction for a wealth of electrochemical/electrocatalytic processes.
Jonas Pfisterer, Ulmas E. Zhumaev, and Katrin F. Domke, "In-operando SERS and TERS toward nanoscale detection of reaction intermediates (Conference Presentation)," Proc. SPIE 10726, Nanoimaging and Nanospectroscopy VI, 1072604 (Presented at SPIE Nanoscience + Engineering: August 19, 2018; Published: 17 September 2018); https://doi.org/10.1117/12.2323103.5836016916001.
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