Electrochemical Surface Plasmon Resonance Measurement of Electrocatalytic Oxidation of Glucose on Gold Electrode

Abstract

The electrochemical reaction of glucose on a thin gold film electrode was investigated using the surface plasmon resonance (SPR) method. A cyclic voltammogram of glucose on a thin gold film electrode showed anodic current in both anodic and cathodic scans. The potential dependence of the refractive index change was simultaneously measured by SPR and showed that the change in the gold electrode surface status switched the catalytic reaction. In addition, a potential step experiment revealed that the SPR signal showed the underlying electrode status whereas the electrode current showed the overall catalytic oxidation of glucose.