Millepore species-like ultra-long carbon fiber/cobalt nickel and its electrochemical activity

Abstract

An ultra-long NiCo precursor having a morphology similar to Millepore species (Millipore sp.) was prepared to utilize a green homogeneous precipitation method. The Millepore species -like component is [MCO3]x · [M(OH)2]y · nH2O (M = Co, Ni; x, y, n = 1–5), which is a precursor of NiCo metal compounds, hydroxides, and oxides. There is no organic residue in the prepared product, making this synthetic procedure green. At the same time, the precursor grown in situ on carbon fiber produces ordered and controllable Millepore sp.-like materials as well as a stand-by electrode. The resistance of the adhesive bond to the glassy carbon electrode by the cobalt-nickel material is avoided. Following electrochemical activity tests, the Millepore sp.-like NiCo precursor showed significant redox activity on dopamine and uric acid. Differential pulse voltammetry can simultaneously detect two substances with excellent linear at the range of uric acid 0.04–0.2 mM and dopamine 6–20 μM.