[Surface-enhanced Raman spectroscopy in studies of corrosion and inhibition on an iron surface].

Application and advanced achievement of surface-enhanced Raman spectroscopy (SERS) in corrosion and inhibition on an iron surface have been reviewed. As a technology providing the molecular information of material structure, SERS is widely applied to the studies of metal corrosion and inhibition, especially for iron. Applications of this spectroscopy technology are showed in three aspects: the SERS enhancement theory of Fe surface, the adsorbent mode of inhibitions on Fe surface, and the structure of oxidation or passivation film on a Fe electrode.

Optimizing detection sensitivity on surface-enhanced Raman scattering of transition-metal electrodes with confocal Raman microscopy.

Some points on how to improve the detection sensitivity of confocal Raman microscopy for the study of surface-enhanced Raman scattering (SERS) of transition-metal electrodes are discussed, including the careful design of the spectroelectrochemical cell, proper selection of the thickness of the solution layer, the binning of charge-coupled device (CCD) pixels, and appropriate setting of the notch filter. Various roughening methods for the Pt, Rh, Fe, Co, and Ni electrode surfaces have been introduced in order to obtain SERS-active surfaces. It has been shown that the appropriate roughening procedure and the optimizing performance of the confocal Raman microscope are the two most important factors to directly generate and observe SERS on net transition-metal electrodes.

[Surface-enhanced Raman spectrum studies of CO adsorbed on platinum electrodes in non-aqueous acetonitrile system].

In the non-aqueous acetonitrile solution, recurring to the confocal Raman system, we studied the catalysis and oxidation of carbon monoxide on the surface of platinum electrode utilizing surface-enhanced Raman spectrum (SERS). As the movement of the potential, the process of the catalysis and oxidation interacted with the surrounding molecular. In the present paper, the catalysis and oxidation of carbon monoxide on the surface of platinum electrode was not clearly observed, but also the dissociation of acetonitrile was discovered simultaneously.

[Competitive adsorption studies of pyridine and acetonitrile on platinum electrodes in non-aqueous system by surface-enhanced Raman spectroscopy].

In the non-aqueous acetonitrile solution, recurring to the confocal Raman system, we studied the intensively chemical adsorption of pyridine(Py) on the surface of platinum electrode utilizing surface-enhanced Raman scattering (SERS). With the change in the potential, the quantity and adsorptive orientation of the adsorbate also change, interacting on the surrounding molecules. In the present paper, the adsorption of Py on the surface of platinum electrode was not only clearly observed, but also the dissociation of acetonitrile was discovered simultaneously.