One-step rapid electrochemical fabrication of self-supported Ni(OH)2/nanoporous gold hybrid electrode for nonenzymatic glucose detection

Abstract

A Ni(OH)2/nanoporous gold (NPG) hybrid electrode was one-step obtained by anodizing gold in NiCl2 solution for 100s. The as-prepared electrode is self-supported due to the nature of the synthesis method. Under the optimal condition, it showed an ultrahigh sensitivity (3286.1μAmM−1cm−2) in a linear range from 0.2μM to 1.1mM, a low detection limit (170nM) and a fast response time (<2s) towards nonenzymatic glucose detection in NaOH solution. The provided strategy is applicable in most laboratories to prepared transition metal hydroxide (MOHx (M=Ni, Co, Cu, Fe, etc.)) modified NPG.