Progress in Scanning Electrochemical Microscopy by Coupling with Electrochemical Impedance and Quartz Crystal Microbalance

Abstract

Scanning electrochemical microscopy (SECM) is a powerful technique for performing quantitative measurements at a local scale. This paper covers the development of combinations of SECM with electrochemical impedance spectroscopy (EIS) and electrochemical quartz crystal microbalance (EQCM). Basic aspects are described and potential applications reported by several research groups are covered. The unique advantages of the coupled techniques--with additional information being obtained from each coupling--are also discussed.

Combined geochemical and electrochemical methodology to quantify corrosion of carbon steel by bacterial activity

“…The electrochemical measurements were performed with a home-made Scanning Electrochemical Microscope (SECM) [26,27] in a 4-electrode cell configuration elaborated specifically for anaerobic and sterile conditions. The double wall glass cell was equipped with the carbon steel working electrode (WE1) placed in the bottom of the cell, and with a platinum probe of 50 µm in radius acting as a second mobile working electrode (WE2) for generating H2.…”

Alternating‐Current Measurements in Scanning Electrochemical Microscopy, Part 1: Principle and Theory

“…[35] Recently, measurements of the electrochemical impedance of microelectrodes in SECM experiments (both in positive and negative feedback modes) were reported. [24,25] They allow a fine description of the diffusion impedance in negative feedback mode, [24] and it has been shown that the low-frequency part of the impedance of the microelectrode is controlled by two types of transport: a spherical diffusion screened by the insulating substrate and a radial diffusion through the thin layer formed by the ultramicroelectrode (UME) and the substrate. In positive feedback mode, [25] experimental data have shown that the diffusion part of the impedance response depends on the position of the tip, because the rate of mass transport increases when the tip approaches the conductive substrate.…”

“…[24,25] They allow a fine description of the diffusion impedance in negative feedback mode, [24] and it has been shown that the low-frequency part of the impedance of the microelectrode is controlled by two types of transport: a spherical diffusion screened by the insulating substrate and a radial diffusion through the thin layer formed by the ultramicroelectrode (UME) and the substrate. In positive feedback mode, [25] experimental data have shown that the diffusion part of the impedance response depends on the position of the tip, because the rate of mass transport increases when the tip approaches the conductive substrate. In addition, experimental results obtained in positive feedback mode were compared to those obtained with a rotating disc electrode (RDE), because of the sim-The development of the scanning electrochemical microscope in ac mode is presented from both experimental and theoretical point of views.…”

Influence of hydrogen-oxidizing bacteria on the corrosion of low carbon steel: Local electrochemical investigations

“…Scanning electrochemical microscopy (SECM), which has been widely described by Bard et al [24][25][26] and subject of numerous reviews [27][28][29], and local electrochemical impedance spectroscopy pioneered by Isaacs et al [21,30] were used as electrochemical techniques. Carbon steel has been considered as candidate material for the multi-barrier system due to the low corrosion rate under reducing conditions.…”