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Method for preparing novel titanium-based Pb O2 anode with low energy consumption and long service life by adding nickel composite intermediate layer

A composite intermediate layer and low energy consumption technology, applied in chemical instruments and methods, electrolytic inorganic material coating, water/sludge/sewage treatment, etc., can solve the problems of cumbersome process, short working life, and limited engineering practicality, etc. The effect of high catalytic activity, extended service life, and simplified cumbersome links

Inactive Publication Date: 2019-03-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of preparing the intermediate layer by brushing and pyrolysis is cumbersome, complicated and difficult to control. The organic pyrolysis gas will cause certain harm and damage to the atmospheric environment and the operator's body and mind, and the deposition of the precious metal intermediate layer will significantly increase the cost of electrode production. The high cost of technology severely limits the engineering practicality of this technology
Therefore, it is still difficult to start from the actual engineering application and fundamentally solve the problem of PbO 2 Bottleneck problems of short working life, poor stability and high energy consumption of shape stable anode (DSA)

Method used

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  • Method for preparing novel titanium-based Pb O2 anode with low energy consumption and long service life by adding nickel composite intermediate layer
  • Method for preparing novel titanium-based Pb O2 anode with low energy consumption and long service life by adding nickel composite intermediate layer

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Embodiment 1

[0018] Firstly, the polished, alkali-washed and pickled titanium plate is used as the cathode, and the nickel plate of equal area is used as the anode, and the nickel composite intermediate layer is prepared by cathodic electrodeposition, and then Ti / Ni-Co 3 o 4 The electrode material is the anode, the stainless steel with the same size is the cathode, and the anode is electrooxidized to prepare β-PbO 2 active layer, thus obtaining Ti / Ni-Co 3 o 4 / PbO 2 shape stable anode. Ni-Co 3 o 4The electrodeposition conditions are: NiSO 4 ·7H 2 O180g / L, Na 2 SO 4 10H 2 O 65g / L, H 3 BO 3 30g / L, NaCl 10g / L, Co 3 o 4 (Particle size 5~10μm) 5g / L is electroplating nickel bath solution, the control temperature is 25±5℃, the electrodeposition time is 45min, and the current density is 2A / dm 2 , The pH value of the bath is 4.7. β-PbO 2 The electrodeposition conditions of the active layer are as follows: Pb(NO 3 ) 2 : 0.45mol / L, HNO 3 1.4mL / L, the pH value is 2.4, the ionic li...

Embodiment 2

[0020] Firstly, the polished, alkali-washed and pickled titanium plate is used as the cathode, and the nickel plate of equal size is used as the anode, and the nickel composite intermediate layer is prepared by cathodic electrodeposition, and then the Ti / Ni-MnO 2 The electrode material is the anode, the stainless steel with the same size is the cathode, and the anode is electrooxidized to prepare β-PbO 2 active layer, thus obtaining Ti / Ni-MnO 2 / PbO 2 shape stable anode. Ni-MnO 2 The electrodeposition conditions are: NiSO 4 ·7H 2 O180g / L, Na 2 SO 4 10H 2 O 65g / L, H 3 BO 3 30g / L, NaCl 10g / L, MnO 2 (Particle size 7~10μm) 5g / L is electroplating nickel bath solution, the control temperature is 25±5℃, the electrodeposition time is 45min, and the current density is 2A / dm 2 , The pH value of the bath is 4.7. β-PbO 2 The electrodeposition conditions of the active layer are as follows: Pb(NO 3 ) 2 : 0.45mol / L, HNO 3 1.4mL / L, the pH value is 2.4, the ionic liquid is 1-e...

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Abstract

The invention discloses a method for preparing novel titanium-based PbO2 anode with low energy consumption and long service life by adding a nickel composite intermediate layer. Through performing cathodic electrodeposition on the surface of a titanium plate which is subjected to oil removal and acid etching pretreatment by adding particles with good conductivity and oxygen evolution catalytic activity, such as MnO2, Co3O4, into the nickel plating deposition solution to prepare the composite intermediate layer, then a beta-PbO2 active layer is electrodeposited on the nickel composite intermediate layer, and Ti / Ni-Co3O4(MnO2) / PbO2 titanium-based PbO2 coating anode is obtained. Due to the fact that the composite intermediate layer effectively prevents corrosive medium and active oxygen fromtransferring to the anodic titanium substrate to generate TiO2 to lead to anode failure reaction, good physical barrier and reaction oxygen barrier effects are achieved, and the service life of the anodic electrode is prolonged.; meanwhile, the high-conductive nickel composite intermediate layer helps to obviously reduce the cell voltage in the electrochemical degradation process and reduce the energy consumption.

Description

technical field [0001] The invention belongs to the technical field of preparation of a lead dioxide-shaped electro-stabilized oxidation electrode, in particular to a low-energy-consumption and long-life titanium-based PbO prepared by adding a nickel composite intermediate layer 2 anode method. Background technique [0002] PbO 2 The shape-stable electrode has excellent electrical conductivity similar to metal, has good corrosion resistance in aqueous solution, good electrocatalytic performance, high oxygen evolution overpotential, and low manufacturing cost. Chemical anodizing is an anode material with great development potential. But the β-PbO with tetragonal crystal structure with high catalytic performance 2 There is a certain intrinsic internal stress in the preparation of electrochemical anodic deposition technology under acidic conditions, and the stability is not as good as that of α-PbO 2 , during the application process of electrolytic water treatment, the new ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12C25D9/06C02F1/467C02F1/461C02F101/30
CPCC02F1/46109C02F1/4672C02F2001/46142C02F2101/30C25D3/12C25D9/06
Inventor 唐长斌王飞卢宇轩牛浩黄平薛娟琴于丽花毕强
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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