Citation: ZHAO Hong-Cai, ZHANG Pu, LI She-Hong, LUO Hong-Xia. Cobalt Hexacyanoferrate-modified Graphene Platform Electrode and Its Electrochemical Sensing toward Hydrogen Peroxide[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(6): 830-836. doi: 10.11895/j.issn.0253-3820.170022 shu

Cobalt Hexacyanoferrate-modified Graphene Platform Electrode and Its Electrochemical Sensing toward Hydrogen Peroxide

Department of Chemistry, Renmin University of China, Beijing 100872, China

Received Date: 12 January 2017
Revised Date: 16 March 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (No.21575160).

A large-area graphene platform electrode (GPE) was fabricated by transferring the chemical vapor deposition (CVD) graphene grown on Cu foils to polyethylene terephthalate (PET) substrates with the aid of polymethyl-methacrylate (PMMA). Then cobalt hexacyanoferrate (CoHCF) was electrodeposited on the GPE by cyclic voltammetry to obtain a CoHCF/GPE. The morphology and electrochemical properties of this electrode were studied by scanning electron microscope (SEM), electrochemical impedance spectroscopy (EIS) and the electrochemical measurements. Results showed that the electrode had favorable sensing effect toward H₂O₂. On the basis of this, a new nonenzyme H₂O₂ sensor was constructed. Under the optimal experimental conditions, the proposed sensor had a quick response to the addition of H₂O₂ (about 2 s) with a wide linear rang (5×10^-3-1.2 mmol/L) and a low detection limit (7.1 nmol/L). This sensor was easy to fabricate and showed excellent stability and anti-interference ability.
- Chemical vapor deposition,
- Graphene,
- Cobalt hexacyanoferrate nanoparticle,
- Chemically modified platform electrode,
- Hydrogen peroxide
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