Preparation and characterization of glassy carbon monolithic electrode for electrochemical analysis

Abstract EN

Carbon monoliths have the advantage of being conductive materials and were therefore also investigated as electrode materials for electrochemical analysis.

A glassy carbon monolithic electrodes (GCME) has been successfully prepared using an adapted method of Liang et al.

[1].

The sample has a high specific surface area and a large pore volume.

Electrochemical analysis indicated that it has fine electrochemical double-layer performance.

Electrochemical measurements obtained on the anodised glassy carbon monolithic electrodes (GCME) showed a more reproducible surface relative to the polished GCME.

The electrode was investigated using cyclic voltammetry following electrochemically induced oxidation to impart hydrophilicity.

The surface oxidation was studied to generate oxygen-containing surface functional groups.

The electrochemical oxidation of GCME was carried using 2M NaOH and 1 M H2SO4, respectively.

Cyclic voltammetry was investigated using a solution containing K3Fe(CN)6 and KCl between -0.2 and +1.1 V.

The scan rate used for the above characterisations was 20 – 100 mV / s.