Nanostructured surfaces

Application of the R-AgLAFe electrode for the Bi(III) electroreduction in the presence of 2-thiocytosine from chlorates(VII) with varied water activity

A. Nosal-Wiercińska1, M. Martyna1

1 Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
E-mail: *anosal@poczta.umcs.lublin.pl; marlena.martyna@poczta.umcs.lublin.pl

So far, the effect of ,,cap-pair" [1] has only been studied on mercury drop electrodes. The use of an electrode with a cyclic renewable film of liquid silver amalgam R-AgLAFe is an excellent alternative to HDME, as it guarantees similar quality and performance parameters to HMDE [2,3], and furthermore fits into the current trend of green chemistry, due to the significant reduction in the consumption of toxic mercury.
The effect of 2-thiocytosine (TC) on the kinetics and mechanism of Bi(III) ions electroreduction in chlorate(VII) solutions under various water activities using R-AgLAFe was investigated in aspect of the ,,cap-pair" effect. The results obtained with the innovative electrode using the different electrochemical techniques enabled to determine the magnitude of the catalytic effect of 2-thiocytosine and the correlation with changes in water activity. The multistep of Bi(III) ions electroreduction process in the presence of TC is controlled by the rate of formation of the nanosized active complexes on the R-AgLAFe electrode, mediating electron transitions. Changes in the Bi(III) ions electroreduction mechanism and in the presence of 2-thiocytosine in high water activity solutions compared to low water activity solutions were demonstrated.

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