期刊
TALANTA
卷 80, 期 2, 页码 539-543出版社
ELSEVIER
DOI: 10.1016/j.talanta.2009.07.022
关键词
Nickel hexacyanoferrate; Chemical deposition; Solo composition; Stability; Sodium ion sensing; Electrocatalysis; Electrochemical analysis
资金
- National Basic Research Program [2007CB714501]
- National Natural Science Foundation of China [20535010, 20828006]
- National Science Fund for Creative Research Groups [20821063]
- Natural Science Foundation of Fujian Province of China [C0710024]
Nickel hexacyanoferrate film modified gold electrode was prepared by a simple chemical deposition procedure from a fresh prepared solution containing ferricyanide, Ni2+, and sodium nitrate. The resultant films have solo composition and are significantly stable as compared to the electrochemically deposited NiHCF films. For different concentrations of Na+ in the solution, the formal potential values of NiHCF shift according to the Nernstian behavior with a slope of 48 mV in the range of 10(-4) to 1.0 M. The NiHCF film was also used for the electrocatalytic oxidation of ascorbic acid. The anodic peak current observed in cyclic voltammetry increased with the ascorbic acid concentration. At a fixed potential under hydrodynamic conditions, the calibration plot was linear over the ascorbic acid concentration range 0.1-12 mM. (C) 2009 Elsevier B.V. All rights reserved.
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