Gold nanoparticles electrooxidation: comparison of theory and experiment |
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Authors: | Kh Z Brainina Leonid G Galperin Еkaterina V Vikulova Natalia Yu Stozhko Аidar M Murzakaev Оlga R Timoshenkova Yuri А Kotov |
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Institution: | (1) Ural State University of Economics, 8 Marta St, 62, Ekaterinburg, 620144, Russia;(2) Ural Federal University, Mira St 19, A-203, Ekaterinburg, 620002, Russia;(3) Institute of Electrophysics, Ural Branch of the Russian Academy of Science, Amundsen St, 106, Ekaterinburg, 620016, Russia |
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Abstract: | The article presents the findings of microscopic and electrochemical studies of size-dependent gold particles electrooxidation.
Gold particles were immobilized on the surface of carbon-containing screen-printed electrodes. The experiment demonstrated
that the transition from macroparticles to nanoparticles caused a shift of the maximum current potential of gold oxidation
into the area with more negative potentials. A decrease in particle size resulted in an increase in the electrochemical activity
of metal. A positive correlation between experimental and calculated curves confirms a mathematical model (2) and correctness of the calculations. Measured parameters of voltammograms, in particular, maximum current potential, can
be used to describe the electrochemical activity and energy properties of nanoparticles. |
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