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Description
The proposed topic allows to utilize the expertise obtained before, during work at Dnieper National Univer. and Dnieper State Medical Univ. with electrodes modified with manganese dioxide, with the topics developed at the Charge Transfer Processes in Hydrodynamic Systems Group at the IPC PAS.
During the first months of my stay at the IPC PAS I was accompanying researchers from the group in their experiments, including microfluidic studies and experiments in cell culture. The proposed project integrates the knowledge being developed at the moment in the main projects from the group, i.e.
Summary of the results
The results of the action were mainly focussed on the evaluation of films on MnO2 electrodeposited under different conditions. It was noticed that the catalytic activity of the deposited films was highly dependent on the method of deposition, and deeper investigation into this phenomenon was imperative for further use of the films. We found that the film of manganese dioxide with the best catalytic characteristics is formed in electrolyte with pH 1 by cyclic voltammetry and after that drying at 60°C. The surface of the selected film was modified with glucose oxidase and used for the determination of glucose concentration in solution. The sensitivity of such an electrode is 117,8 μA/mmol cm2. The range of determined concentrations of glucose is from 0.1 mM to 3 mM. The sensitivity is comparable to electrodes based on expensive materials such as graphene and noble metals. These results were published in: Poltavets et al., Dalton Trans. 52, 13769 – 13780 (2023).