Abstract
A simple acid-etching method was used to leach out silver from a bimetallic gold-silver based Digital Video Disc (DVD), which was further treated via a cyclic voltammetric scanning in 1 mmol/L HAuCl4 solution to create a porous gold nanostructure. The as-fabricated electrode was characterized by field-emission scanning electron microscopy, energy-dispersed X-ray spectroscopy and X-ray diffraction. The high electro-catalytic activity of the resulting electrode toward the reduction of hydrogen peroxide (H2O2) presented excellent linear relationship in the range of 8.0×10−5 to 1.26×10−2 mol/L with the detection limit of 2.0×10−5 mol/L (S/N=3). The as-developed non-enzyme-sensor showed good reproducibility, stability, and selectivity.
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