Three-electrode integrated electrochemical platform based on nanoporous gold for simultaneous determination of hydroquinone and catechol with high selectivity
In this paper, a novel three-electrode integrated electrochemical platform (TEIEP) is designed and fabricated for simultaneous detection of hydroquinone (HQ) and catechol (CC), in which nanoporous gold (NPG) served as the working electrode, Pt particles and nanoporous Ag/AgCl served as the courter electrode and the reference electrode, respectively. Due to the fantastic catalytic activity of NPG, the TEIEP exhibits high selectivity and sensitively towards HQ and CC determination with a distinct separation of peak-to-peak in their coexistence. The oxidation peak current densities of HQ and CC were linear over the range of 0.2 – 100 μM with the detection limits of 0.083 μM (S/N = 3) for HQ and 0.119 μM (S/N = 3) for CC, respectively. Moreover, the TEIEP owns satisfactory reproducibility and anti-interference ability, and can be used in real water sample analysis. This work will undoubtedly provide an available choice for catalytic material and an integrated structure and further a promising application prospect for developing novel sensors for on-site environmental monitoring.