期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 153, 期 1, 页码 239-245出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.10.040
关键词
Electrocatalytic oxidation; Electrodeposition; Hydrazine; Choline; Gold nanoparticles
资金
- Specialized Research Fund for Shanghai Second Polytechnic University [XQD208014]
- Excellent Young Scholars Research Fund of Shanghai [egd08014]
- Program for New Century Excellent Talents in University [NCET-10-883]
- Shanghai Institutions of Higher Learning
A highly sensitive hydrazine sensor was developed based on the electrodeposition of gold nanoparticles onto the choline film modified glassy carbon electrode (GNPs/Ch/GCE). The electrochemical experiments showed that the GNPs/Ch film exhibited a distinctly higher activity for the electro-oxidation of hydrazine than GNPs with 3.4-fold enhancement of peak current. The kinetic parameters such as the electron transfer coefficient (alpha) and the rate of electron exchange (k) for the oxidation of hydrazine were determined. The diffusion coefficient (D) of hydrazine in solution was also calculated by chronoamperometry. The sensor exhibited two wide linear ranges of 5.0 x 10(-7)-5.0 x 10(-4) and 5.0 x 10(-4)-9.3 x 10(-3) M with the detection limit of 1.0 x 10(-7) M (s/n = 3). The proposed electrode presented excellent operational and storage stability for the determination of hydrazine. Moreover, the sensor showed outstanding sensitivity, selectivity-and reproducibility properties. All the results indicated a good potential application of this sensor in the detection of hydrazine. (C) 2010 Elsevier B.V. All rights reserved.
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