Electrochemical Behavior of Deoxycholic Acid on Multiwalled Carbon Nanotubes Modified Electrode

Electrochemical reduction of Deoxycholic acid (DCA), as important biological molecule has been studied in 0.05 M KH₂PO₄ aqueous methanol solution (1 : 1, v/v) at a multiwalled carbon nanotubes modified electrode. Based on cyclic voltammetry, Tafel plot, the possible mechanism of the electrochemical reduction of DCA was investigated, as well as DCA mechanical calculations. The transfer coefficient, α, the exchange current density, i₀, the diffusion coefficient, D0 at the MWCNT modified GCE were determined as 0.505, 5.655×10^?7 A/cm² and 1.579×10^?5 cm²/s, respectively. The results of chronoamperometric suggested that the reductive product of DCA was the corresponding hydroxymethyl compound in an over‐all four‐electron process.