Electroreduction of Bi(III) Ions at a Cyclically Renewable Liquid Silver Amalgam Film Electrode in the Presence of Methionine

• Main Authors: Agnieszka Nosal-Wiercińska, Marlena Martyna, Valentin Mirčeski, Sławomira Skrzypek
• Format: Article
• Language: English
• Published: MDPI AG 2021-06-01
• Series: Molecules
• Subjects: cyclically renewable liquid silver amalgam film electrode (R–AgLAFE); electrochemistry; electroreduction of Bi(III); active complexes; catalytic activity
• Online Access: https://www.mdpi.com/1420-3049/26/13/3972

The catalytic influence of methionine (Mt) on the electroreduction of Bi(III) ions on the novel, cyclically renewable liquid silver amalgam film electrode (R–AgLAFE) in a non-complexing electrolyte solution was examined. The presence of methionine leads to a multistep reaction mechanism, where the transfer of the first electron is the rate limiting step, which is the subject of catalytic augmentation. The catalytic activity of methionine is a consequence of its ability to remove water molecules from the bismuth ion coordination sphere, as well as to form active complexes on the electrode surface, facilitating the electron transfer process.