Novel Electrochemical Raman Spectroscopy Enabled by Water Immersion Objective

Electrochemical Raman spectroscopy is a powerful molecular lever diagnostic, technique for in situ investigation of adsorption and reactions on various material surfaces. However, there is still a big room to improve the optical path to meet the increasing request of higher detection sensitivity and spatial resolution. Herein, we proposed a novel electrochemical Raman setup based on a water immersion objective. It dramatically reduces mismatch of the refractive index in the light path: Consequently, significant: improvement in detection sensitivity and spatial resolution has been achieved from both Zemax simulation and the experimental results. Furthermore, the thickness of electrolyte layer could be expanded to 2 mm without any influence on the signal collection; Such a thick electrolyte layer allows a Much normal,electrochemical response during the spectroelectrochemical investigations of the methanol oxidation.