کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
178655 | 459311 | 2016 | 4 صفحه PDF | دانلود رایگان |
• The reduction of selenocystine at selenium-modified gold electrodes is reported.
• Diffusionally controlled voltammetry is observed following surface modification.
• The proposed gold–selenium film is readily achieved via electrochemical cycling under mild conditions.
The voltammetric response of seleno-l-cystine has been studied at gold substrates under physiological conditions. The reactivity of diselenides is utilized to generate a modified electrode surface, which in turn allows for electroanalysis of solution-based selenium species. Stable and reproducible voltammetry is observed for selenocystine reduction at pH 7 on selenium-modified gold substrates (Emid = − 486 mV vs. Ag/AgCl) and is consistent with a diffusionally controlled process. Modification of the gold surface is readily achieved via electrochemical cycling in the presence of a diselenide source at conventional scan rates. These studies afford voltammetric characterization of the selenocystine/selenocysteine redox couple under physiologically relevant conditions and highlight the potential utility of selenium-modified substrates for electroanalysis of chalcogen-containing species.
Journal: Electrochemistry Communications - Volume 69, August 2016, Pages 28–31