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Sensors 2015, 15(9), 23249-23261; doi:10.3390/s150923249

A Palladium-Tin Modified Microband Electrode Array for Nitrate Determination

1
State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
2
University of Chinese Academy of Sciences, Beijing 100080, China
*
Author to whom correspondence should be addressed.
Academic Editor: Kagan Kerman
Received: 29 June 2015 / Revised: 16 August 2015 / Accepted: 4 September 2015 / Published: 15 September 2015
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Abstract

A microband electrode array modified with palladium-tin bimetallic composite has been developed for nitrate determination. The microband electrode array was fabricated by Micro Electro-Mechanical System (MEMS) technique. Palladium and tin were electrodeposited successively on the electrode, forming a double-layer structure. The effect of the Pd-Sn composite was investigated and its enhancement of catalytic activity and lifetime was revealed. The Pd-Sn modified electrode showed good linearity (R2 = 0.998) from 1 mg/L to 20 mg/L for nitrate determination with a sensitivity of 398 μA/(mg∙L−1∙cm2). The electrode exhibited a satisfying analytical performance after 60 days of storage, indicating a long lifetime. Good repeatability was also displayed by the Pd-Sn modified electrodes. The results provided an option for nitrate determination in water. View Full-Text
Keywords: nitrate determination; bimetallic composite; palladium-tin coexistence; electrodeposition; microband electrode array nitrate determination; bimetallic composite; palladium-tin coexistence; electrodeposition; microband electrode array
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fu, Y.; Bian, C.; Kuang, J.; Wang, J.; Tong, J.; Xia, S. A Palladium-Tin Modified Microband Electrode Array for Nitrate Determination. Sensors 2015, 15, 23249-23261.

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