Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 27, Pages 9937-9945Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.08.084
Keywords
Ni-Pt; Sensing mechanism; Erinaceous surface; Sensitivity; Reliability
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Funding
- National Science Council of the Republic of China [NSC 99-2221-E-035-093]
- Feng Chia University [10G27101]
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An amperometric sensor that measured ascorbic acid by the oxidation of the ascorbic acid on a Ni-Pt electrode was fabricated. The Ni component of the Ni-Pt alloy played a crucial role as a modifier that developed an erinaceous surface, which enlarged the sensing area and increased the sensitivity of the electrode. The Pt82Ni18 electrode exhibited the best sensitivity of 333 mu A cm(-2) mM(-1) for ascorbic acid sensing. This electrode was further tested for reproducibility of the sensitivity, endurance, and interference; it exhibited excellent performance compared with electrodes reported in the literature. (C) 2011 Elsevier Ltd. All rights reserved.
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