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Method for determining effective area and load current of porous electrode in three-dimensional structure

A technology of porous electrodes and three-dimensional structures, applied in the direction of material analysis, measuring devices, instruments, etc. through electromagnetic means, can solve problems such as high difficulty and poor precision

Active Publication Date: 2017-08-29
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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  • Method for determining effective area and load current of porous electrode in three-dimensional structure

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Embodiment 1

[0032] A method for determining the effective area and load current of activated carbon (GAC) particle electrode for phenol oxidation, including determining the electrode area expansion coefficient (λ) by cyclic voltammetry (CV) curve, and then determining the effective area of ​​the GAC particle electrode, and by electrochemical impedance. Spectroscopy (EIS) determines the current utilization efficiency (β) of the electrode and thus the load current of the GAC particle electrode.

[0033] like figure 2 The electrochemical reaction device shown in Figure (a) represents the presence of the GAC particle electrode and Figure (b) represents the absence of the GAC particle electrode. The device includes a water pump 1 , a water inlet pipe 2 , an electrolytic cell 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 in the electrolytic c...

Embodiment 2

[0051] A method for determining the effective area and load current of activated carbon (GAC) particle electrode for oxidation of methyl orange, including determining the electrode area expansion coefficient (λ) through a cyclic voltammetry (CV) curve to determine the effective area of ​​the GAC particle electrode, and Chemical Impedance Spectroscopy (EIS) determines the current utilization efficiency (β) of the electrode and thus the load current of the GAC particle electrode.

[0052] exist figure 2 The methyl orange degradation test was carried out in the electrolysis apparatus shown. Test conditions: The electrolyte is 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 apparatus shown. CV test conditions: the scanning range is 0~2.0V, the scanning speed is set to 10mV / s, 20mV / s, 50mV / s, 100mV / s, 150mV / s, 200mV / s, and the electrolyte is 3% Na 2 SO 4 +60...

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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 particularly 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 pollutant treatment and chemical product production. Therefore, in order to effectively evaluate the redox performance of the three-dimensional structure, the quantitative evaluation of the effective area of ​​the porous electrode and the load current is particularly important. At present, the quantitative calculation method of electrode area: overpotential distribution beyond the mass transfer limit; in potassium ferricyanide (K 3 [Fe(CN) 6 ]) on the CV curve in solution. The quantitative calculation of load current can be achieved by the Butler-Volmer equation. [0003] Since the effective area and load ...

Claims

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Application Information

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