A Molybdenum Carbide Nanotubes Modified Electrode as the Functionalized Sensing Platform for Electrochemical Detection of Dopamine

In this work, molybdenum carbide (Mo2C) nanotubes were prepared via the self-degradable template method and high-temperature calcination, and then were successfully used to modify glassy carbon electrode (CGE) for the high-sensitivity determination of dopamine (DA) without the inference of ascorbic acid(AA) and uric acid (UA). The surface morphology of Mo2C nanotubes has been investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). Owing to the enhanced electron transfer rate and high surface area of Mo2C, the modified electrode not only exhibits very excellent electrochemical performance for DA, but also has good analytical performance for DA in the mixture with AA and UA through differential pulse voltammetry (DPV), which can be applied for DA detection with wide linear range(0.005-50 mu mol L-1) and low detection limit 0.001 mu mol L-1. The modified electrode has been applied to detect DA in DA hydrochloride injection by using standard adding method with satisfactory results.