Urchin‐like Ag Nanowires as Non‐enzymatic Hydrogen Peroxide Sensor

Abstract

Abstract Urchin‐like Ag nanowires were prepared by reacting AgNO 3 (aq) with Cu metal in the presence of cetyltrimethylammonium chloride and HNO 3 (aq) on a screen printed carbon electrode at room temperature. The diameters of the nanowires were about 100 nm, while the lengths were up to 10 μm. Cyclic voltammetric experiments using the Ag nanowires as the working electrode showed electrocatalytic H 2 O 2 reduction. The electrode exhibited a high sensitivity of 4705 μA mM ‐1 mg ‐1 cm ‐2 from 50 μM to 10.35 mM and a measurable detection limit of 10 μM in amperometric detection. This is the first report on Ag NWs for non‐enzymatic H 2 O 2 sensing.