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PbO2 electrode with high oxygen evolution potential and long service life and preparation method thereof

A technology with oxygen evolution potential and long life, applied in the field of material chemistry, it can solve the problems affecting the electrochemical activity and stability of electrodes, weak binding force, large resistance, etc., and achieve good electrocatalytic performance, increase assembly capacity, and large specific surface area. Effect

Inactive Publication Date: 2011-05-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the preparation of Ti / PbO 2 electrode was found that the Ti and PbO 2 The resistance on the interface is large and the binding force is weak, which affects the electrochemical activity and stability of the electrode

Method used

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  • PbO2 electrode with high oxygen evolution potential and long service life and preparation method thereof
  • PbO2 electrode with high oxygen evolution potential and long service life and preparation method thereof
  • PbO2 electrode with high oxygen evolution potential and long service life and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] F-PbO 2 / Ti electrode preparation. Described method specifically comprises the following steps:

[0027] (1) Set the thickness to 0.08mm and the size to 3cm 2 The surface of the pure titanium sheet is mechanically polished and cleaned;

[0028] (2) 0.4mol / L Pb(NO 3 ) 2 , 0.03mol / L NaF, 0.08mol / L HNO 3 , 6ml / L fluororesin is prepared as electroplating solution;

[0029] (3) With the Ti prepared in step (1) as the working electrode, the platinum sheet as the auxiliary electrode, and the saturated calomel electrode (SCE) as the reference electrode, at a reaction temperature of 80°C, the fluorine-containing PbO 2 Deposited on a Ti plate, the deposition current is 0.04A / cm 2 , the deposition time is 1h, the preparation of F-PbO 2 / Ti electrode electrode products.

[0030] (4) The oxygen evolution potential of the electrode is about 1.9V, and the service life of the electrode is about 3 years calculated from the accelerated life test results.

Embodiment 2

[0032] PbO 2 / TiO 2 - Preparation of NTs / Ti electrodes. Described method specifically comprises the following steps:

[0033] (1) Set the thickness to 0.08mm and the size to 3cm 2 The surface of the pure titanium sheet is mechanically polished and cleaned;

[0034] (2) With 0.05wt% NaF and supporting electrolyte 1.6wt% Na 2 SO 4 As solute, add alcohol additive 10wt% polyethylene glycol (PG400), the solvent is water balance, prepare electrolyte;

[0035] (3) With the titanium sheet in step (1) as the working electrode, the platinum sheet as the counter electrode, and the distance between the working electrode and the counter electrode is 0.5cm, carry out electrochemical anodizing treatment, the anodizing voltage is 10V, and the anodizing time is 3h , to obtain upright ordered TiO on the Ti-based surface 2 nanotube arrays;

[0036] (4) 0.4mol / L Pb(NO 3 ) 2 , 0.03mol / L NaF, 0.08mol / L HNO 3 , 10ml / L of fluororesin is prepared as electroplating solution;

[0037] (5) Ti...

Embodiment 3

[0040] A kind of PbO with high oxygen evolution potential 2 Electrode and preparation method, the method is to adopt the electrochemical deposition method, using titanium dioxide nanotubes grown upright on the titanium base as the carrier, to prepare F-PbO 2 / TiO 2 - NTs / Ti electrodes. Described method specifically comprises the following steps:

[0041] (1) Set the thickness to 0.1mm and the size to 6cm 2 The surface of the pure titanium sheet is mechanically polished and cleaned;

[0042] (2) with 1.0wt% NaF and supporting electrolyte 2.0wt% Na 2 SO 4 As solute, add alcohol additive 50wt% polyethylene glycol (PG400), the solvent is the water balance, prepare electrolyte;

[0043] (3) With the titanium sheet in step (1) as the working electrode, the platinum sheet as the counter electrode, the distance between the working electrode and the counter electrode is 1.0 cm, carry out electrochemical anodizing treatment, the anodizing voltage is 20V, and the anodizing time is ...

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Abstract

The invention relates to a PbO2 electrode with high oxygen evolution potential and long service life and a preparation method thereof. The preparation method comprises the following steps of: pre-growing a layer of erect and orderly TiO2-NTs nanotubes, used as an interlayer, on a Ti plate by using an electrochemical anodization method; and then electrically depositing PbO2 in a lead nitrate solution containing fluorine macromolecules to prepare an F-PbO2 / TiO2-NTs / Ti electrode. Compared with a traditional PbO2 electrode, the PbO2 electrode disclosed in the invention has high oxygen evolution potential of more than 2.4 V and long service life of longer than 20 years.

Description

technical field [0001] The invention relates to the field of material chemistry and the technical field of electrochemical methods, and relates to a PbO with high oxygen evolution potential and long life 2 Electrode materials and preparation methods. Background technique [0002] PbO 2 Electrode is a kind of anode material that has been studied extensively. It has the advantages of low cost, easy to obtain materials, relatively simple manufacturing process, high oxygen evolution potential and high catalytic activity. But due to PbO 2 The binding performance with the matrix is ​​poor, and Pb is toxic, so these deficiencies limit the PbO 2 Electrode application. In order to overcome these deficiencies, some researchers doped PbO with fluoride ions 2 In the study, it was found that the doping of fluoride ions limited the PbO 2 The free movement of free oxygen atoms in the hydration layer reduces its diffusion into the anode, and at the same time, the fluorine ions in the ...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 赵国华张永刚雷燕竹
Owner TONGJI UNIV
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