Cuprous Oxide Cubebox for Nonenzymatic Amperometric Hydrogen Peroxide Detection

Abstract

Cuprous oxide (Cu 2 O)nanomaterial has been successfully obtained by a simple sol-gel technique.The characterization indicated that the powders have a good crystalline structure, and the synthesis was successfully controlled in nanoscale.Cyclic voltammetry (CV) revealed that Cu 2 O cubebox exhibited a direct electrocatalytic activity for the reduction of hydrogen peroxide (H 2 O 2 ) in sodium hydroxide solution.The enzyme-less amperometric sensor used in the detection of H 2 O 2 with detection limit of 81.69μM (S/N = 3) over wide linear detection ranges up to 0.39 mM and with a high sensitivity of 444.7μA•mM -1 •cm -2 , and a possible mechanism was also given in the paper.