Activated Copper Cathodes as Sensors for Nitrite Analysis

The increased surface area of copper electrodes upon applying a suitable potential protocol was characterized by atomic force microscopy images. Scanning electrochemical microscopy was used to demonstrate the enhanced reactivity of the generated surface. The modified electrode showed excellent catal...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2010-11, Vol.22 (22), p.2627-2632
Main Authors: Gamboa, Juan C. M., Peña, Roselyn C., Paixão, Thiago R. L. C., Lima, Alex S., Bertotti, Mauro
Format: Article
Language:English
Subjects:
CATHODES
Confidence intervals
Copper
Copper electrode
Differential pulse voltammetry
ELECTRODES
Environmental analysis
Microscopy
Nitrite
Nitrites
REDUCTION
Scanning electrochemical microscopy
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Summary:The increased surface area of copper electrodes upon applying a suitable potential protocol was characterized by atomic force microscopy images. Scanning electrochemical microscopy was used to demonstrate the enhanced reactivity of the generated surface. The modified electrode showed excellent catalytic activity towards nitrite reduction in acidic medium (pH 2). This new platform was used in the development of a fast and simple voltammetric method for nitrite determination. Commercial and rainwater spiked samples were analyzed and the data showed an excellent agreement with those obtained with a reference spectrophotometric method (Griess reaction) at a confidence level of 95 % (Student’s t‐test).
ISSN:1040-0397
1521-4109
1521-4109
DOI:10.1002/elan.201000318