A Ti-based PBO based on in situ thermal reaction to prepare the intermediate layer of conductive ceramic film 2 Anode preparation method

Abstract

A Titanium-Based PbO Based on In-Situ Thermal Reaction to Prepare the Intermediate Layer of Conductive Ceramic Film 2 The anode preparation method comprises: (1) titanium material anodic oxidation; (2) high-temperature thermal reaction under hydrogen atmosphere to prepare Ti 4 o 7 ‑TiN ceramic film; (3) anodic electrodeposition β‑PbO 2 Active layer, finally made Ti / Ti 4 o 7 ‑TiN / PbO 2 coated anode. The present invention uses electrochemical anodic oxidation and high-temperature thermal reduction in situ to obtain a titanium suboxide-titanium nitride composite ceramic film with good conductivity, strong corrosion resistance, and high strength (hardness), and uses this as the bottom layer to pass through the anode electrode Ti / Ti prepared by deposition 4 o 7 ‑TiN / PbO 2 Coated electrodes, and finally a new type of titanium-based PbO with long life and low energy consumption 2 Coated anode; and the good conductivity of the electrode makes the cell voltage of the electrode electrochemical preparation and electrolysis process significantly reduced, which can save power consumption.

Description

technical field [0001] The invention belongs to the technical field of lead dioxide shape-stable anode (DSA) materials, in particular to a titanium-based PbO based on in-situ thermal reaction for preparing the middle layer of a conductive ceramic film 2 Anode preparation method. Background technique [0002] PbO 2 It 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, and has become a widely used electrolytic production of many inorganic and organic compounds, One of the anode materials such as electrochemical oxidation to remove organic matter in sewage and acid liquid oxygen evolution electrometallurgy. Titanium-based PbO 2 Although the electrode has a small specific gravity, high strength, good corrosion resistance, and good indication as a valve metal, it is easy to generate TiO between the Ti matrix and the active ...

AI Technical Summary

Problems solved by technology

The most effective of these is the use of the addition of interlayers, i.e. between a titanium matrix and PbO 2 Adding an intermediate layer between the active layers can not only effectively suppress and prevent the formation of a non-conductive passivation layer on the substrate, but also further improve the PbO 2 The bonding force between the active layer and the substrate can reduce the interface resistance and internal stress, so as to effectively avoid the coating peeling off, so it can improve the Ti / PbO 2 The life of the electrode is improved, and the performance of the electrode is improved. However, the existing DSA preparation technology generally has the problems of poor durability and high energy consumption.

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