期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 791, 期 -, 页码 131-137出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2017.03.016
关键词
Nanowire networks; Dynamic template; Nitrite; Electrochemical sensor
资金
- National Natural Science Foundation of China [21475118]
Support-free interconnected Pt nanowire networks (Pt NWNs) were fabricated by rapidly pouring sodium borohydride (NaBH4) solution into the Pt precursor solution, where hydrogen bubbles were in situ generated from hydrolysis and oxidation of NaBH4 as a dynamic template. There was no any capping agent. surfactant, seed, polymer, or special experimental device involved. The morphology, composition and structure of the samples were mainly characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The architectures displayed highly electrocatalytic behavior toward nitrite oxidation and wide linear ranges of 1.0 mu M-24.0 mM and 24.0-132.0 mM, together with high sensitivity (16.94 and 4.34 mu A mM(-1)) and low detection limit (0.14 mu M, S/N = 3). It demonstrated the improved electroanalytical performance for nitrite determination because of the unique free-standing Pt nanostructures with clean surfaces. (C) 2017 Elsevier B.V. All rights reserved.
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