Preparation of Pt/DNA-MWCNTs/GC Electrode and Its Electrocatalytic Activity toward H₂O₂ Reduction

Authors

Li-li FAN, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Guilin 541004, Guangxi, China;
Li-na WU, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Guilin 541004, Guangxi, China;
Zhi-yu QU, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Guilin 541004, Guangxi, China;
Dan-feng LIU, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Guilin 541004, Guangxi, China;
Jun-ming ZHANG, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Guilin 541004, Guangxi, China;
Si-ming FAN, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Guilin 541004, Guangxi, China;
You-jun FAN, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Guilin 541004, Guangxi, China;Follow

Corresponding Author

You-jun FAN(youjunfan@mailbox.gxnu.edu.cn)

Abstract

The DNA-multi-walled carbon nanotubes (MWCNTs)/glassy carbon (GC) electrode was prepared by modifying the DNA functionalized MWCNTs composite on a GC electrode. A novel non-enzymatic H₂O₂ sensing electrode was fabricated by electrodepositing Pt nanoparticles on the DNA-MWCNTs/GC electrode. The modified electrodes were characterized by scanning electron microscope (SEM). The response properties of the sensing electrode to H₂O₂ were investigated by cyclic voltammetry and chronoamperometry. The results indicated that the sensing electrode exhibited a good linear relationship between response current and H₂O₂ concentration in the range of 0.04 ~ 18.07 mmol·L^-1 with a detection limit of 3.85 μmol·L^-1 (S/N = 3), as well as excellent reproducibility, stability and selectivity.

Graphical Abstract

Keywords

DNA, functionalization, multi-walled carbon nanotubes, Pt, H2O2 detection

DOI Link

https://doi.org/10.13208/j.electrochem.131165

Publication Date

2014-10-28

Online Available Date

2014-04-20

Revised Date

2014-04-15

Received Date

2013-12-24

Recommended Citation

Li-li FAN, Li-na WU, Zhi-yu QU, Dan-feng LIU, Jun-ming ZHANG, Si-ming FAN, You-jun FAN. Preparation of Pt/DNA-MWCNTs/GC Electrode and Its Electrocatalytic Activity toward H₂O₂ Reduction[J]. Journal of Electrochemistry, 2014 , 20(5): 459-464.
DOI: 10.13208/j.electrochem.131165
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss5/8