A method for modifying carbon-based electrodes based on electrochemical in-situ graphene synthesis

CN109856204A8Inactive Publication Date: 2019-12-13WUHAN INST OF VIROLOGY CHINESE ACADEMY OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2019-01-18
Publication Date
2019-12-13
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The preparation process of traditional graphene-modified electrodes has problems such as time-consuming and energy-consuming, cumbersome processes, safety hazards, pollution, and limited stability and repeatability. Moreover, the modification method is easily limited by the shape and composition of the electrode.

Method used

Adopt a carbon-based electrode modification method based on electrochemical in-situ graphene synthesis, and perform cyclic voltammetry or DC voltage method through a three-electrode or two-electrode system to avoid the use of external auxiliary components, achieve fully green production, and perform electrochemical treatment Parameters control the hydrophilicity, conductivity and electrochemical catalytic performance of the graphene modified layer.

Benefits of technology

It simplifies the preparation process, reduces equipment requirements and processing time, avoids contamination, improves the reversibility and electrochemical activity of the electrode, and is suitable for the development of a variety of electrochemically active devices, including biosensors and fuel cells.

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Abstract

The invention discloses an electrochemical in-situ graphene synthesis-based modification method for a carbon-based electrode. According to the method, a three-electrode or two-electrode system is adopted to complete an electrochemical treatment process, wherein the electrochemical treatment can be (1) cyclic voltammetry or a (2) direct-voltage method. According to the cyclic voltammetry, a three-electrode working surface is arranged in a supported electrolyte solution; positive voltage scanning is applied to the carbon-based electrode, so that graphene oxide can be obtained in situ; and negative voltage scanning is applied to the carbon-based electrode, so that reduced graphene oxide can be obtained in situ. According to the direct-voltage voltage method, a three-electrode working surfaceor two-electrode working surface is arranged in a supported electrolyte solution, and a constant positive direct-current voltage is applied to the carbon-based electrode so as to treat the carbon-based electrode, so that graphene oxide can be obtained in situ; and a constant negative direct-current voltage is applied to the carbon-based electrode so as to treat the carbon-based electrode, so thateduced graphene oxide can be obtained in situ. Compared with conventional modification methods such as (oxidized) graphene drop-coating and in-situ vapor deposition, the method has the advantages of high speed, simplicity, low cost, green synthesis, high controllability, high reproducibility and high stability.
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