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Amperometric detection of hydrogen peroxide using a nanofibrous membrane sputtered with silver

Li, Dawei, Luo, Lei, Pang, Zengyuan, Chen, Xiaodong, Cai, Yibing, Wei, Qufu
RSC advances 2013 v.4 no.8 pp. 3857-3863
catalytic activity, detection limit, electrochemistry, glassy carbon electrode, hydrogen peroxide, nanofibers, nanoparticles, nanosilver, sensors (equipment), silver
In this study, a novel hydrogen peroxide (H₂O₂) electrochemical sensor was fabricated by covering a nanofibrous membrane on a glassy carbon electrode (GCE). Silver (Ag) nanoparticles were deposited on the two surfaces (front and back) of the nanofibrous membrane by a sputtering-deposition process with a high purity silver sputtering target. Cyclic voltammetric measurements revealed that the obtained nanofibrous membrane exhibited a well-defined pair of redox peaks and a prominent electrocatalytic activity toward H₂O₂. Amperometric measurements indicated that the sensor based on the silver coated nanofibrous membrane showed a linear response to H₂O₂ concentrations ranging from 10 μM to 16.5 mM with a detection limit of 4 μM and a maximum sensitivity of 157 mA cm⁻² M⁻¹. In addition, the sensor also exhibited good selectivity and stability, and can offer a novel method to detect H₂O₂.