Facile Synthesis of Pt-CuO Nanocomposite Films for Non-Enzymatic Glucose Sensor Application

Abstract

© The Author(s) 2016. Nanocomposite films of Pt-CuO were synthesized via galvanostatic electrodeposition combined with galvanic replacement and post-synthesis thermal anneal. First, Cu-Cu2O composite was prepared by galvanostatic electrodeposition; heat-treatment of the as-prepared Cu-Cu2O composite at 375◦C for 10 h resulted in a CuO electrode showing response to glucose with long term stability. Further enhanced response to glucose was obtained with a Pt-CuO electrode, which was synthesized by galvanic replacement of Cu-Cu2O in 10 mM PtCl4solution for 30 s followed by annealing at 375◦C for 10 h. The resulting Pt-CuO electrode showed excellent response to glucose in alkaline solution with an analytical sensitivity of 3812 μAmM−1cm−2, a limit of detection (LOD) of 7.5 μM, and a linear response range to glucose up to 0.6 mM. These results may be extended to the fabrication of other noble metal-metal oxide nanocomposite electrodes for sensor applications.