First Electrochemical Studies on “CAP—PAIR” Effect for BI(III) Ion Electroreduction in the Presence of 2-Thiocytosine on Novel Cyclically Renewable Liquid Silver Amalgam Film Electrode (R-AgLAFE)

Abstract

A novel cyclically renewable liquid silver amalgam film electrode (R-AgLAFE) has been used for the first time in studies of electrode processes under “cap-pair” conditions. It has been presented detailed production process of prototype sensor R-AgLAFE with liquid amalgam film silver based electrode refreshed cyclically before each measurement, along with complete specifications of its metrologic and utility parameters. It has been shown that 2-thiocytosine is catalyzing the Bi(III) ions electroreduction. Studies clearly indicate the multi-phase mechanism of the electrode process, in which active complexes Bi—(RS—Hg) in the adsorption layer mediate in the transfer of electrons. Obtained results of measurements on mechanism and kinetics of “cap—pair” effect using novel R-AgLAFE sensor confirmed assumptions that it is an attractive alternative to HMDEs.