Electrochemical reduction of cyclic diacyl peroxide (2,3-dioxaspiro[4.4]nonane-1,4-dione or spirocyclopentylmalonyl peroxide) was explored using a smooth platinum anode/smooth gold cathode pair in an aqueous medium. This peroxide during the electrolysis was selectively reduced to cyclopentane-1,1-dicarboxylic acid in 85
Electrochemical corrosion of a gold anode in a weakly basic aqueous solution of hexamethylenetetramine (urotropine) was studied in the galvanostatic mode at various currents. The formation of a compact gold deposit as dendrites on the cathode and colloidal gold nanoparticles in the electrolyte was detected by scanning and transmission electron microscopy. The kinetics of anode corrosion was studied by the gravimetric measurements of the loss in weight of the gold anode and the increase in the mass of the cathode over time. By cyclic voltammetry, it was shown that a gold-urotropine complex can be formed at the anode and subsequently migrate to the solution to be reduced at the cathode. After electrolysis, urotropine was isolated from the electrolyte in the unchanged form
The kinetics and mechanism of corrosion of an Au anode in a weakly basic aqueous solution of 2,2-dimethyl-1,3-diaminopropane (2,2-DM-1,3-DAP) were studied by gravimetry and cyclic voltammetry. Scanning and transmission electron microscopy was used to determine that under galvanostatic conditions the products of anode corrosion are reduced on a steel cathode with the formation of not only an electrolytic Au deposition on the cathode, but also colloidal gold nanoparticles in the electrolyte medium. The product of the interaction of 2,2-DM-1,3-DAP with atmospheric CO2, namely, the carbamic acid internal salt 3-ammonio-2,2-dimethyl-propylcarbamate, was isolated from the reaction solution.
The anodic behavior of gold in solutions containing spirocyclopentyl malonyl peroxide is studied via cyclic voltammetry. It is found that gold dissolves under anodic polarization with the formation of a complex of singly charged cations with spirocyclopentyl malonyl peroxide as a ligand. Gold in this case corrodes at lower potentials (about 500 mV) than in the supporting solution.
The kinetics and mechanism of corrosion of gold anode in a weakly basic aqueous solution of N,N-dimethylpropane-1,3-diamine have been studied by cyclic voltammetry and gravimetry. According to the scanning and transmission electron microscopy data, the corrosion products of gold anode are reduced at both steel and platinum cathodes under galvanostatic conditions to give not only electrolytic gold deposit but also colloidal gold nanoparticles in the electrolyte.
The electrochemical reduction of spirocyclopentylmalonyl peroxide in an aqueous medium is studied via cyclic voltammetry on a gold stationary electrode. Based on calculations using parameters of cyclic voltammetry recorded at different scan rates, it is concluded that the studied material underwent two successive one-electron reductions, and a scheme is proposed for its cathodic reduction.
The electrochemical behavior of ascorbic acid (AA) is studied by means of cyclic voltammetry (CVA) and square-wave voltammetry (SWVA) on a boron doped diamond electrode (BDD). The possibility of using the voltammetric response signal to determine quantitatively the concentration of AA in an aqueous solution is shown. An analytical direct correlation function for SWVA at BDD is obtained. It is shown that the detection limit for AA is 1.87 μM. The applicability of SWVA for determining the content of AA in pharmaceutical preparations is demonstrated.