期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 174, 期 -, 页码 45-50出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.08.017
关键词
Electrochemical sensor; Electrodeposition; Fuel cells; Methanol detection; Nanostructured electrode; Platinum nanoparticles
资金
- National Research Foundation of Korea
- MEST [2010-0026167]
- Korean Federation of Science and Technology, South Korea
- National Research Foundation of Korea [2010-0026167] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A platinum (Pt) nanoparticle-based electrochemical sensor has been applied for the detection of methanol in methanol fuel cells. The platinum nanoparticles were electrodeposited on glassy carbon (GC) in HCl containing hydrogen hexachloroplatinate using cyclic voltammetry. The size and distribution of the nanoparticles were found to be dependent on the deposition parameters, such as the concentration of platinum ions, scan rate, and number of cycles. The deposited platinum nanoparticles were spin-coated with silicone epoxy (SE), and scanning electron microscopy (SEM) confirmed the deposition. The concentration of methanol was determined by a double potential step chronoamperometric method using the SE/Pt/GC electrode at the oxidation potential of +0.60 V vs. Ag/AgCl electrode. The sensor exhibited a long-term stability for 40 h repeat using and has an advantage that adsorption of CO was eliminated by use of SE film. The dynamic range of the analytical method was determined to be from 2.5 x 10(-4) to 10.0 M in two slopes with a detection limit of 1.0 x 10(-4) M. (C) 2012 Elsevier B.V. All rights reserved.
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