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Swiss Wantong, can you explain the electrochemical Raman spectroscopy
Date: 2022-04-06Read: 0
The spectroelectrochemical Raman spectrometer combines a light source, a dual potentiostat/galvanostat, and a spectrometer (UV/VIS wavelength range: 350-1050 nm) in one box, and is equipped with software for simultaneous optical and electrochemical experiments. Powerful electrochemical Raman spectroscopy analysis.
Electrochemical Raman spectroscopy combines Raman spectroscopy technology with the study of electrochemical electrode reaction mechanisms. It can be used to measure the types and concentrations of electrochemically active particles in solutions, as well as their changes over time and electrode potential, to study electrode process kinetics and electrode electrolyte solution interface properties. Its main drawback is low sensitivity. So, what exactly is Raman spectroscopy?
Electrochemical Raman spectroscopy combines Raman spectroscopy technology with the study of electrochemical electrode reaction mechanisms. It can be used to measure the types and concentrations of electrochemically active particles in solutions, as well as their changes over time and electrode potential, to study electrode process kinetics and electrode electrolyte solution interface properties. Its main drawback is low sensitivity. So, what exactly is Raman spectroscopy?
When light is focused on the sample, it interacts with matter in different directions. lightMay be absorbed, scattered, transmitted, or reflected.In 1828, Indian physicist Sir C.V. Raman focused sunlight onto liquid
A series of tests were conducted on the body sample. .
The vibrational energy of a molecule that is initially in the ground state and returns to above the ground state after excitationThe state, where the wavelength of scattered light becomes longer, is called Stokes Raman scattering.
Resonance Raman Scattering (RRS): ExcitationWhen the frequency is equal to or close to the electron absorption frequency of the chromophore in the tested moleculeVibration, Raman scattering enhancement by 102-106 times, mainly used for studying particles in solutionThe type.
Light scatters when interacting with a medium, and scattering can be divided into two types:
1. Elastic (Rayleigh) scattering: Scattering light with the same frequency as the incident light
2. Non elastic (Raman) scattering: Changes in the frequency of scattered light
The vibrational energy of a molecule that is initially in the ground state and returns to above the ground state after excitationThe state, where the wavelength of scattered light becomes longer, is called Stokes Raman scattering.
The molecule is already in a high vibrational state and returns to the ground state after excitation. scatteringThe shortening of light wavelength is called anti Stokes Raman scattering.
Resonance Raman Scattering (RRS): ExcitationWhen the frequency is equal to or close to the electron absorption frequency of the chromophore in the tested moleculeVibration, Raman scattering enhancement by 102-106 times, mainly used for studying particles in solutionThe type.
Surface Enhanced Raman Scattering (SERS),SERS: When substance molecules adsorb onto specific metal surfaces, theyThe Raman scattering intensity of the material has been greatly improved, which is used for studying electrode surfaces andAdsorbed substances.