Electrochemical H₂O₂Sensor Based on the Co-immobilization of Phosphmolybdic Acid and Graphene on PEDOT Film Electrode with Nafion

Authors

Hao-xian ZHOU, Guangxi Key Laboratory of Low Carbon Energy Materials, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;
Jun-ming ZHANG, Guangxi Key Laboratory of Low Carbon Energy Materials, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;
Zhi-yu QU, Guangxi Key Laboratory of Low Carbon Energy Materials, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;
Pan-yu ZHANG, Guangxi Key Laboratory of Low Carbon Energy Materials, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;
You-jun FAN, Guangxi Key Laboratory of Low Carbon Energy Materials, College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;Follow

Corresponding Author

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

Abstract

With a glassy carbon electrode (GCE) as the substrate, the poly(3,4-ethylenedioxythiophene) (PEDOT) film electrode was prepared through the electrochemical polymerization method, then a novel non-enzymatic electrochemical H₂O₂ sensor was fabricated by co-immobilizing phosphomolybdic acid and graphene with Nafion on the PEDOT/GCE electrode. The modified electrodes were characterized by scanning electron microscopy (SEM), while the responsive properties of the sensor to H₂O₂ were investigated by cyclic voltammetry and chronoamperometry. The results demonstrated that, under the optimized conditions, the sensor exhibited good electrocatalytic performance for H₂O₂ reduction. The current response of the sensor was linear to the H₂O₂ concentration in the range of 2.91×10^-6 ~ 1.83×10^-2 mol•L^-1 with the detection limit and sensitivity being 9.90×10^-7 mol•L^-1 (S/N = 3) and 112.5 μA•(mmol•L^-1)^-1, respectively. Moreover, the sensor also exhibited excellent reproducibility and selectivity.

Graphical Abstract

Keywords

electrochemical H2O2 sensor, poly(3, 4-ethylenedioxythiophene), phosphmolybdic acid, graphene

DOI Link

https://doi.org/10.13208/j.electrochem.151008

Publication Date

2016-02-29

Online Available Date

2015-12-02

Revised Date

2015-11-24

Received Date

2015-10-08

Recommended Citation

Hao-xian ZHOU, Jun-ming ZHANG, Zhi-yu QU, Pan-yu ZHANG, You-jun FAN. Electrochemical H₂O₂Sensor Based on the Co-immobilization of Phosphmolybdic Acid and Graphene on PEDOT Film Electrode with Nafion[J]. Journal of Electrochemistry, 2016 , 22(1): 57-63.
DOI: 10.13208/j.electrochem.151008
Available at: https://jelectrochem.xmu.edu.cn/journal/vol22/iss1/6