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Electrochemical Behavior of Deoxycholic Acid on Multiwalled Carbon Nanotubes Modified Electrode
Author(s) -
Liu Xiaoxiao,
Wang Lishi,
Zhang Shuifeng,
Deng Xuerong,
Tang Xiaolan,
Huang Xinjian
Publication year - 2006
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200603665
Subject(s) - tafel equation , cyclic voltammetry , electrochemistry , exchange current density , deoxycholic acid , aqueous solution , inorganic chemistry , electrocatalyst , electrode , chemistry , hydroxymethyl , diffusion , electron transfer , materials science , bile acid , biochemistry , physics , thermodynamics
Electrochemical reduction of Deoxycholic acid (DCA), as important biological molecule has been studied in 0.05 M KH 2 PO 4 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, i 0 , the diffusion coefficient, D0 at the MWCNT modified GCE were determined as 0.505, 5.655×10 −7 A/cm 2 and 1.579×10 −5 cm 2 /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.