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Method for Determination of Effective Area and Load Current of Porous Electrode in Three-dimensional Structure

A three-dimensional porous and porous electrode technology, which is applied in the direction of material analysis, instruments, and measurement devices by electromagnetic means, and can solve problems such as high difficulty and poor accuracy.

Active Publication Date: 2019-05-24
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problems proposed by the above-mentioned background technology, the present invention aims to provide a method for determining the effective area and load current of the porous electrode in the three-dimensional structure, and solve the problem that the existing calculation method uses an empirical model and ignores the huge gap between the reactant and potassium ferricyanide. Poor precision caused by differences, etc., and the difficulty caused by the kinetic analysis of the reaction series involved in the calculation process

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Embodiment 1

[0032] The method for determining the effective area and load current of activated carbon (GAC) particle electrode to oxidize phenol, including determining the electrode area expansion coefficient (λ) through cyclic voltammetry (CV) curves to determine the effective area of ​​GAC particle electrode, and through electrochemical impedance Spectroscopy (EIS) determines the current utilization efficiency (β) of the electrode and in turn determines the load current of the GAC particle electrode.

[0033] Such as figure 2 The electrochemical reaction device shown, wherein the figure (a) indicates the presence of the GAC particle electrode, and the figure (b) indicates the absence of the GAC particle electrode. The device includes a water pump 1, a water inlet pipe 2, an electrolytic tank 3, a porous water distribution plate 4, a cathode plate 5, an anode plate 6, a GAC ​​particle electrode 7, a power source 8, and a water outlet pipe 9. The water distribution plate is located at a...

Embodiment 2

[0051] The method for determining the effective area and the load current of the active carbon (GAC) particle electrode to oxidize methyl orange includes determining the electrode area expansion coefficient (λ) through the cyclic voltammetry (CV) curve to determine the effective area of ​​the GAC particle electrode, and determining the effective area of ​​the GAC particle electrode through the cyclic voltammetry (CV) curve. Chemical impedance spectroscopy (EIS) determined the current utilization efficiency (β) of the electrode and then determined the load current of the GAC particle electrode.

[0052] exist figure 2 Methyl orange degradation experiments were performed in the electrolysis apparatus shown. Test conditions: the electrolyte uses 3% Na 2 SO 4 +600mg / L methyl orange; current density: 100A / m 2 ;Flow rate: 2.0L / h.

[0053] exist image 3 Electrochemical tests were performed in the electrolysis setup shown. CV test conditions: scan range 0 ~ 2.0V, scan speed is...

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Abstract

The invention discloses a method for determining an effective area and a load current of a porous electrode in a three-dimensional structure. The method comprises determining an area expansion coefficient of a porous electrode through a cyclic voltammetry scanning curve, calculating the product of the area expansion coefficient and a geometric area of a metal anode in a three-dimensional structure, wherein the product is an effective area of the porous electrode, calculating current utilization efficiency of the porous electrode through an electrochemical impedance spectrogram, and calculating the product of the current utilization efficiency and a work current to obtain a load current of the porous electrode. The method solves the problem that the existing calculation method adopts the empirical model, ignores the precision error caused by the huge difference between the reactants and the potassium ferricyanide, and has high calculating difficulty in reaction order kinetic analysis in the calculating process.

Description

technical field [0001] The invention belongs to the field of electrochemical oxidation / reduction reaction, and in particular relates to a method for determining the effective area and load current of a porous electrode in a three-dimensional structure. Background technique [0002] Compared with the planar structure, the three-dimensional structure has many advantages in the treatment of pollutants and the production of chemical products. Therefore, in order to effectively evaluate the redox performance of the three-dimensional structure, it is particularly important to quantitatively evaluate the effective area of ​​the porous electrode and the load current. At present, the method of quantitatively calculating the electrode area: overpotential distribution beyond the mass transfer limit; in potassium ferricyanide (K 3 [Fe(CN) 6 ]) peak-seeking on the CV curve in the solution. The quantitative calculation of the load current can be realized by the Butler-Volmer equation. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
CPCG01N27/4163
Inventor 王立章孔艳
Owner CHINA UNIV OF MINING & TECH