Amorphous Ni-P nanoparticles anchoring on nickel foam as an efficient integrated anode for glucose sensing and oxygen evolution
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Mingzhu Wang, Xue Wang, Shiya Feng, Daiping He, Ping Jiang
Abstract
Ever-growing efforts have been devoted to developing cost-effective and earth-abundant electrocatalyst with high-performance in biosensing and energy energy conversion. In this work, amorphous Ni-P nanoparticles anchoring on Ni foam (Ni-P/NF) was prepared through a facile electroless deposition approach. The morphology and composition were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). As an integrated electrode, Ni-P/NF exhibits excellent catalytic activity towards glucose oxidation, with a high sensitivity of 13.89 mA mM-1 cm-2, a low detection limit (LOD) of 1 µM, a wide detection ranges from 2 µM to 0.54 mM, and a quick response (< 10 s). The selectivity and reliability for practical application in blood glucose detection were also investigated in detail. In addition to electrocatalytic glucose oxidation, Ni-P/NF shows remarkable catalytic activity towards oxygen evolution reaction (OER) in alkaline solution, and it only needs an overpotential of 360 mV to afford 50 mA cm-2. Moreover, Ni-P/NF shows excellent durability under alkaline OER condition. All these results demonstrate Ni-P/NF as highly efficient integrated anode in both biosensing and energy conversion.
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