Powder microelectrode embedded with carboxyl multi-walled carbon nanotubes for sensitive and quantitative detection of nitrofuran residues

In this study, a sensitive electrochemical detection method for nitrofurazone (NF) and semicarbazide (SC) based on a powder microelectrode embedded with carboxyl multi-walled carbon nanotubes was developed.

Study on Electrochemical Impedance Spectrum Analysis of LiFePO4 in Aqueous Solutions by Using Powder Microelectrode

LiFePO4 is becoming promising lithium ion cathode material. Because period of testing call is long, sometimes it cannot accurately characterize for cathode materials. By using Electrochemical Impedance Spectrum, it would be better to describe performance of materials. The electrochemical parameters have been obtained by modeling process of insertion and desertion by Electrochemical Impedance Spectrum, which is helpful to analyze LiFePO4 electrochemical performance. Because of quick response and preciseness of electrochemical method, it would be better to analyze cathode materials.

Ferrous Ion Oxidation Behavior on a Bacteria Attached Power Micro Electrode

In this paper a special At.f (Acidthiobacillus ferrooxidans) modified carbon powder microelectrode was prepared, and a series of electrochemical measurements were conducted to study ferrous ion Fe2 + oxidation mechanism on the electrode. CV (cyclic voltammetry) studies show that this oxidation reaction is reversible when c (Fe2 +) is lower than 0.16mol/L. At higher speed scanning, the currents through the electrode include two parts of the micro disc current and the thin layer current, while at lower speed scanning of steady state process the current provided by thin layer could be ignored, the whole oxidation reaction was controlled by diffusion process, and the calculated diffusion coefficient D0 is about 6. 25 ×10 - 6cm2.s – 1. The transient potential stair step studies also have been conducted. The results are consistence with steady state ones although thin layer currents should be taken in to account.