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Titanium-based composite anode and preparing method and application thereof

A composite anode and titanium-based technology, applied in the field of electrochemistry, can solve problems such as short service life, achieve long service life, inhibit passivation, and high efficiency

Active Publication Date: 2015-12-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the preparation methods of titanium-based composite anodes are various, the process is simple, the coating has high catalytic activity and good selectivity, but there is a fatal disadvantage: short service life

Method used

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  • Titanium-based composite anode and preparing method and application thereof
  • Titanium-based composite anode and preparing method and application thereof
  • Titanium-based composite anode and preparing method and application thereof

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Embodiment 1

[0039] A titanium-based composite anode of the present invention, such as figure 1 As shown, it includes a titanium substrate 1, a dense protective intermediate layer 2 and an active surface layer 3; wherein the dense protective intermediate layer 2 is a titanium dioxide layer, the titanium substrate 1 is a metal titanium plate with a thickness of 1.2mm, and the active surface layer 3 is IrO 2 layer; TiO2 layer and IrO 2 Layers are generated synchronously in situ.

[0040] The preparation method of the titanium-based composite anode of this embodiment comprises the following steps:

[0041] 1) Cut a metal titanium plate with a thickness of 1.2mm into a specification of 5cm×5cm, then polish it with sandpaper, degrease and clean it in a boiling 5wt% NaOH solution for 1h, and then etch it in a boiling 15wt% oxalic acid solution for 1h, Finally, it was rinsed with deionized water to obtain a titanium metal plate with a clean surface.

[0042] 2) Put the metal titanium plate wit...

Embodiment 2

[0047] A titanium-based composite anode of the present invention, such as figure 1 As shown, it includes a titanium substrate 1, a dense protective intermediate layer 2 and an active surface layer 3; wherein the dense protective intermediate layer 2 is a titanium dioxide layer, the titanium substrate 1 is a metal titanium plate with a thickness of 1.2mm, and the active surface layer 3 is MnO2 layer; TiO2 layer and MnO 2 Layers are generated synchronously in situ.

[0048] The preparation method of the titanium-based composite anode of this embodiment comprises the following steps:

[0049] 1) Cut a metal titanium plate with a thickness of 1.2mm into a size of 2cm×2cm, then polish it with sandpaper, wash it with alkali in a boiling 8wt% NaOH solution for 1h, and then etch it in a boiling 15wt% oxalic acid solution for 1h , and finally rinsed with deionized water to obtain a titanium metal plate with a clean surface.

[0050] 2) Put the metal titanium plate with clean surface ...

Embodiment 3

[0054] A titanium-based composite anode of the present invention, such as figure 1 As shown, it includes a titanium substrate 1, a dense protective intermediate layer 2 and an active surface layer 3; wherein the dense protective intermediate layer 2 is a titanium dioxide layer, the titanium substrate 1 is a metal titanium plate with a thickness of 1.2mm, and the active surface layer 3 is MnO 2 layer; TiO2 layer and MnO 2 Layers are generated synchronously in situ.

[0055] The preparation method of the titanium-based composite anode of this embodiment comprises the following steps:

[0056] 1) Cut a metal titanium plate with a thickness of 1.2mm into a size of 2cm×2cm, then polish it with sandpaper, wash it with alkali in a boiling 12wt% NaOH solution for 1h, and then etch it in a boiling 12wt% oxalic acid solution for 1h , and finally rinsed with deionized water to obtain a titanium metal plate with a clean surface.

[0057] 2) Put the metal titanium plate obtained in step...

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Abstract

The invention discloses a titanium-based composite anode which comprises a titanium substrate, a compact protection middle layer and an active surface layer. The compact protection middle layer is a titanium dioxide layer, and the titanium dioxide layer and the active surface layer are synchronously generated in an in-situ manner. A preparing method for the titanium-based composite anode comprises the following steps that firstly, the titanium substrate is polished and cleaned for standby use; secondly, the cleaned titanium substrate is arranged in a mixed solution of surfactant and metal salt with a strong oxidizing property, the pH value of the mixed solution is regulated to be 4-7, a reaction is carried out through heating, and a titanium-based composite anode precursor is obtained; and thirdly, the titanium-based composite anode precursor is roasted, and the titanium-based composite anode is obtained. In the titanium-based composite anode, the titanium dioxide layer and the active surface layer are synchronously generated in the in-situ manner, the composite anode is prepared through only one step, so that the technological steps are simple, and energy consumption is low. The titanium dioxide layer synchronously generated in the in-situ manner is very compact, further oxidation of the substrate can be restrained, and the catalytic activity of the active surface layer generated on the surface is high.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a titanium-based composite anode and its preparation method and application. Background technique [0002] Titanium-based composite anode is an electrode composed of titanium or titanium alloy as the substrate and coated with metal oxides of active elements such as Sb, Ir, Pb, Mn, etc. It has high catalytic activity, delays the passivation of the substrate, and has good selectivity for the reaction. advantage. Traditional electrodes, such as graphite anodes, are not strong enough, and lead-silver alloy anodes have disadvantages such as lead dissolving into the electrolyte. According to the different uses and requirements of the electrode, the coating and structure of the electrode can be designed in a targeted manner to reduce the occurrence of side reactions and improve the yield and current efficiency of the target product. This titanium-based composite anode is widely used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/10
Inventor 郭华军陈鑫王志兴李新海
Owner CENT SOUTH UNIV
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