Study on electrochemical behavior of Tyrosine at multi-wall carbon nanotubes modified glassy carbon electrode

摘要

A multi -wall carbon nanotubes (MWCNT) - dihexadecyl hydrogen phosphate (DHP) complex film modified glassy carbon electrode (GCE) was developed The electrochemical behavior of Tyrosine (Tyr) at the MWCNT-modified GCE was investigated in detail. The MWCNT-modified GCE exhibited electrocatalytic activity to the oxidation of Tyr since the peak current increased significantly and the oxidation over-potential lowered. Furthermore, the mechanism for the oxidation of Tyr at the MWCNT-coated GCE way discussed Finally, some electrochemical parameter was also studied. The number of electron transfer (n) was 2, standard heterogeneous rate constant (k(0)) was 1.67x10(-4) cm.s(-1), and the diffusion coefficient (D-R) of tyrosine was 4.25x10(-5) cm(2).s(-1).