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A novel hydrogen peroxide sensor based on electrodeposited copper/cuprous oxide nanocomposites

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Abstract

In this work, copper/cuprous oxide (Cu/Cu2O) nanocomposites were electrodeposited on a fluorine doped tin oxide (FTO) glass substrate for sensitive determination of hydrogen peroxide (H2O2). The Cu/Cu2O nanocomposites were synthesized on FTO at a constant current density of −0.4 mA cm−2 in 0.3 M CuSO4 (pH 9.5) under magnetic agitation. The composition and morphology of Cu/Cu2O nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy and X-ray photoelectron spectroscopy. Taking advantage of the synergistic effects of Cu and Cu2O, the fabricated Cu/Cu2O/FTO electrode showed excellent electrocatalytic activity towards the oxidation of H2O2. The electrocatalytic performance of Cu/Cu2O/FTO was evaluated by linear sweep voltammetry and amperometry. Under optimized conditions, the developed sensor exhibited a wide linear range of 0.2–2000 μM for the determination of H2O2 with a detection limit of 0.04 μM (S/N = 3). In addition, the proposed H2O2 sensor was successfully applied for the determination of H2O2 in milk samples, indicating that the electrodeposited Cu/Cu2O nanocomposites are promising nanomaterials for electrochemical sensors.

Graphical abstract: A novel hydrogen peroxide sensor based on electrodeposited copper/cuprous oxide nanocomposites

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Publication details

The article was received on 30 Sep 2018, accepted on 13 Nov 2018 and first published on 15 Nov 2018


Article type: Paper
DOI: 10.1039/C8AN01876F
Citation: Analyst, 2019, Advance Article
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    A novel hydrogen peroxide sensor based on electrodeposited copper/cuprous oxide nanocomposites

    L. Han, L. Tang, D. Deng, H. He, M. Zhou and L. Luo, Analyst, 2019, Advance Article , DOI: 10.1039/C8AN01876F

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