циклическая вольтамперометрия

DOI: https://doi.org/10.18500/1608-4039-2017-17-3-123-134

УДК 541.136

DOI:  https://doi.org/10.18500/1608-4039-2016-16-3-100-121

УДК 541.136

DOI:  https://doi.org/10.18500/1608-4039-2016-16-1-34-41

The synthesis of catalysts 20 Au/C with different degree of dispersion. These systems were investigated for activity in the oxygen electroreduction reaction with methods of the cyclic voltammograms and polarization curves. The increase of rate and depth of process (the number of electrons increases from 2 to 3.5) in the transition from compact to gold nanoparticles.

By cyclic voltammetry in alkaline solution investigatied electrochemical and electrocatalytic properties of meso-tetramethyltetraben- zoporphyrin with copper, iron, nickel and cobalt. Influence of change of potentials in area from 0.5 to -1.4 В and speeds of scanning from 10 to 100 mV/s on cyclic I-E-curvcs and redox-transformations of catalysts is studied.

The study of the anodic oxidation of borohydride-ion BH₄^– on catalytically active nickel electrode by methods of potentiostatic inclusion, galvanostatically inclusion, cyclic voltammetry and infrared spectroscopy with Fourier transformation. The composition of some intermediates of the process of electrochemical oxidation of BH₄^– and the mechanism of decomposition of borohydride, which includes the following basic stages: BH₄^– → BH₃(OH)^– → BH₂(OH)₂^– → BH(OH)₃^– → B(OH)₄^–, is determined. The regularities of the kinetics of the electrochemical oxidation of BH₄^– – ion Ni-electrode is determined. The diffusion coefficient BH₄^– ion in aqueous solution at a temperature of 25°C, measured by electrochemical methods, ranges from 5.3·10^–5 to 1.6·10^–5, the average value of 2·10^–5 cm²/s.