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Production of coating anode for electrolysis

A manufacturing method and coating technology, applied in coatings, electrodes, electrolytic components, etc., can solve the problems affecting the bonding force between Ti metal and the oxide in the middle layer, and the failure to control the oxide morphology, etc., to achieve good conductivity , the effect of preventing passivation problems

Inactive Publication Date: 2005-10-12
SHANGHAI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Since the above-mentioned patented technology fails to handle the metal oxide intermediate layer well, the morphology of the oxide cannot be controlled, and it is not an in-situ prepared oxide, which also affects the bonding force between the Ti metal and the intermediate layer oxide. question

Method used

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Embodiment Construction

[0013] Implementation 1: Titanium is used as the substrate, titanium oxide generated in situ is used as the middle layer, and platinum is coated on the outer layer to form a coated anode. Using 99.99% pure titanium plate, it is firstly polished, then cleaned with ultrasonic waves, then mechanically polished with alumina, at 0.5MH 2 SO 4 Anodized at 25°C, the current density during oxidation is: i=5-50mA cm 2 , making it in situ to generate titanium dioxide, and then containing Pt(NH 3 ) 2 (NO 2 ) 2 H 2 SO 4 In the solution, metal platinum is deposited under the condition of constant potential power supply by electrochemical method to make Ti / TiO 2 / Pt electrode.

[0014] The electrode works well in an anode due to electroplating tin.

[0015] Implementation 2: Titanium is used as the substrate, titanium oxide generated in situ is used as the middle layer, and iridium oxide is coated on the outer layer to form a coated anode. First, clean the titanium plate with ultra...

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Abstract

A process of preparing coating positive pole for electrolyzation. The coating positive pole bases Ti. Middle layer is oxide Ti. Outside layer is Pt or Pt-Ru oxidate. The coat can be obtained by way of electrochemical oxidation or heat decomposition.

Description

technical field [0001] The invention relates to a method for manufacturing a coated anode for electrolysis, which belongs to the technical field of electrochemical electrode manufacturing. Background technique [0002] The application of Ti metal or its alloys as anodes in the electrochemical industry is increasing day by day, especially the anodes based on Ti metal and coated with metal oxides have attracted more attention and attention, and have been widely used Chlor-alkali industry, water electrolysis, sewage treatment, organic synthesis and electrodeposition industry. [0003] Ti-based noble metal oxides have excellent electrocatalytic activity and have been widely used and studied. Especially since the Dutch successfully developed Ti-based RuO in 1965 2 Since the coating of anodes, much of the work in anode research has revolved around metal oxides. [0004] As a key component in the electrochemical industry, the anode should generally meet the following requirement...

Claims

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Application Information

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IPC IPC(8): C23C28/00C25B11/04
CPCC23C28/3455C23C28/322C23C28/345
Inventor 姚书典沈嘉年孙娟
Owner SHANGHAI UNIV
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