In situ Raman Spectroscopy to Monitor Interfacial Electron Transfer Process: from Fundamental to Application Case Studies

Figure 1 (A) a LabRAM HR800 confocal microscope and (B) a homemade Kel-F spectro-electrochemical cell.

Author Infomation: Institute of Innovative Research, Tokyo Institute of Technology

Abstract: In situ Raman spectroscopy is capable of probing electron transfer processes under electrochemical condition by monitoring local structure and reactivity properties of solid/liquid interfaces. Therefore, in situ Raman spectroscopy is now recognized as one of the powerful surface characterisation techniques for the investigation of the fundamental and application studies, such as development of energy conversion and bio-mediating devices. In addition, an introduction of nanostructured surfaces increases the sensitivity of Raman signals, capable of observing spectroscopic features from molecular level. This article gives a brief history of Raman spectroscopy in the introduction, followed by an overview of the recent in situ Raman spectroscopic studies in our group, particularly focusing on the electrochemical and microbial electron transfer processes at solid/liquid interfaces under electrochemical condition.

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