Electrochemical behavior of a TEMPO-modified electrode and its electrocatalytic oxidation of benzyl alcohol

Abstract

Multimolecular layers of 2,2,6,6-tetramethyl-l-piperidinyloxy(TEMPO) was immobilized on a glassy carbon electrode coated with polyacrylic acid. The coverage of TEMPO was about 2 × 10-7 mol/cm2 and Esurfo′ was 0.36 V vs. a Ag/Ag+(0.10 M) reference electrode. Electrocatalytic oxidation of benzyl alcohol with a TEMPO-modified electrode was observed by cyclic and differential pulse voltammetries. Electrocatalytic current measured by amperometry at an applied potential of 0.45 V was linearly increased as the concentration of benzyl alcohol was increased.