Electrochemical Synthesis of Cu_xO/Cu₂S Nanocomposites as Nonenzymatic Glucose Sensor

摘要

The focus of this study is to explore ways of accelerating the corrosion rate of copper anodes for thepossible synthesis of copper nano-composites on the counter electrode, and the subsequent applicationsof such composites as nonenzymatic glucose sensor. Normally, a strong corrosion resistance of copperanodes emerges in alkaline solutions due to the formation of a passive copper hydroxide film, whichprevents further corrosion. In this research the presence of sulfide ions in the electrolyte was found todramatically promote the corrosion process and eventually led to the production of Cu x O/Cu 2 S (whereCu x O was consist of Cu 2 O and CuO) nanocomposites on the counter electrode during theelectrochemical corrosion process. When the as-prepared copper nanocomposites electrodes were usedto detect the oxidation of glucose, a strongly enhanced anodic process was obtained, in which thedetection limit was found to be around 10 uM with a linear range of 10-1000 uM and a detectionsensitivity of 2688 uA cm ?2 mM ?1 .