Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 45, Issue 3, Pages 846-851Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2013.09.023
Keywords
Nickel-cobalt hydroxide; Glucose sensing; Non-enzymatic
Categories
Funding
- National Science Council Taiwan [NSC101-2221-E-007-112-MY3, 102-3113-P-006-012, 102-3113-P-006-010]
- Low Carbon Energy Research Center of National Tsing Hua University
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Binary Ni-Co hydroxide is directly grown on screen-printed carbon electrodes (SPCEs) through cathodic deposition for detecting glucose. The material has been identified to consist of nickel-cobalt hydroxide (denoted as (Ni-Co)(OH)(2)) by X-ray photoelectron spectroscopic analysis. From cyclic voltammetric (CV) and chronoamperometric (CA) results, (Ni-Co)(OH)(2) shows a more explicit signal than Co(OH)(2) and a less positive detecting potential than Ni(OH)(2) for glucose oxidation. Such synergistic performances suggest the atomic scale mixing of Ni and Co ions in the hydroxide matrix. The amperometric detection of this non-enzymatic glucose sensing shows a linear calibration curve up to 3700 mu M with a sensitivity of 122.45 mu A/(mM cm(2)) (R-2 = 0.989). The interference responses of 25 mu M ascobic acid (AA), uric acid (UA), and dopamine (DA) were 10.76, 14.29 and 1.41% of the signal of 0.2 mM glucose, respectively. The binary (Ni-Co)(OH)(2) exhibits a low detecting potential, a high signal-to-noise ratio, and a wide calibration-curve range for the non-enzymatic glucose sensing. (c) 2013 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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