Electrocatalytic oxidation of hydrazine by copper iodide modified sol-gel derived carbon-ceramic composite Electrode

Abstract

A new sol-gel derived ceramic-carbon composite electrode was fabricated by the use of CuI as modifier. The electrocatalytic activity of the copper iodide modified sol-gel derived ceramiccarbon composite (CIM-SGD-CCC) electrode was examined for the oxidation of hydrazine. Cyclic voltammetry was employed to study the electrochemical and electrocatalytic properties of the modified electrode. Results showed that the CIM-SGD-CCC electrode has very high catalytic activity for electrooxidation of hydrazine. This proves that the copper iodide bears the main role in electro-catalytic oxidation of hydrazine. This modified electrode shows fast amperometric response with the range from 1 μ mol L -1 to 40 μ mol L -1 and the limit of detection (LOD) of 0.524 μ mol L -1 for hydrazine. The relative standard deviation (R.S.D.) was 0.72 % for 5 successive assays. High stability, good reproducibility, rapid response, easy surface regeneration and fabrication are the important characteristics of the proposed electrode.

One-Pot Synthesis of Copper Iodide-Polypyrrole Nanocomposites

“…From the experiment it is seen that the anodic peak obtained from pure CuI at 0.5 V and CuI-PPy modified GCE at 0.35 V (Figure 10) corresponds to the oxidation of copper in copper iodide. Obviously, this phenomenon had a similar nature as reported in [28]. It should be highlighted that the presence of hydroxyl-ions in solution facilitates this oxidation process.…”

“…Apart from those, CuI is used as a perspective catalyst in a large number of organic synthesis, viz., Heck-types reactions [9,10], Stills-types [11], Ullmann-type routes [12][13][14][15][16][17][18][19] Suzuki-Miyaura and Sonogashira reactions of cross-coupling [20][21][22] and many others [19,[22][23][24][25][26][27]. In addition, CuI was reported as an effective electrocatalyst in hydrazine-related synthesis [28] and formic acid oxidation [29].…”

Photocatalytic Carbon Dioxide Reduction at p‐Type Copper(I) Iodide

“…Recent studies show that CuI is ap romising material for application in organic electronic devices. [30] However,t he activity of CuI in photocatalytic processes remains unraveled. [28] The g-phase CuI can also find application in bipolar diodes (e.g.,p -CuI/n-ZnO) [29] or as an electrocatalyst.…”

“…[28] The g-phase CuI can also find application in bipolar diodes (e.g.,p -CuI/n-ZnO) [29] or as an electrocatalyst. [30] However,t he activity of CuI in photocatalytic processes remains unraveled. To our best knowledge there are no reports on application of CuI as ap hotocatalyst.…”