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Application of the Nanostructured R-AgLAFE Electrode for the Bi(III) Electroreduction in the Presence of 2-Thiocytosine from Chlorates(VII) with Varied Water Activity

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Abstract

The results of kinetic measurements using the innovative nanostructured cyclically refreshable liquid amalgam film silver–based electrode (R-AgLAFE) indicated the accelerating influence of 2-thiocytosine and water activity in the multistep of Bi(III) electroreduction in chlorate(VII) related to the ‘cap-pair’ effect. The highest catalytic activity was observed for 1 mol·dm−3 chlorate(VII) solution. The nature of the rate constants changes in the function of potential points out to the existence of a multistage process of Bi(III) ion electroreduction in the presence of 2-thiocytosine as well as insignificant changes in the Bi(III) electroreduction mechanism in the presence of 2-thiocytosine in solutions with small water activity as compared to those with large water activity. In this mechanism, the chemical stages of Bi–(RS–Hg) active complexes formation (located inside the adsorbate layer) with the participation of 2-thiocytosine, which is a mediator in their formation, can be distinguished. Probably, their different structures and properties determine different catalytic activities.

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Funding

The work has been supported by the National Science Centre (Poland) under grant no. DEC-2018/29/B/ST5/01572.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland

    Marlena Martyna & Agnieszka Nosal-Wiercińska

  2. Department of Pediatric Neurology, III Chair of Pediatrics, Medical University of Lublin, ul. Gębali 6, 20-093 Lublin, Poland

    Beata Gołębiowska

Authors
  1. Marlena Martyna
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  2. Agnieszka Nosal-Wiercińska
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  3. Beata Gołębiowska
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Correspondence to Marlena Martyna.

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Martyna, M., Nosal-Wiercińska, A. & Gołębiowska, B. Application of the Nanostructured R-AgLAFE Electrode for the Bi(III) Electroreduction in the Presence of 2-Thiocytosine from Chlorates(VII) with Varied Water Activity. Electrocatalysis 13, 425–434 (2022). https://doi.org/10.1007/s12678-022-00729-3

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