Preparation method of titanium-based PbO2 anode with conductive ceramic membrane intermediate layer based on in-situ thermal reaction

Abstract

The invention discloses a preparation method of a titanium-based PbO2 anode with a conductive ceramic membrane intermediate layer based on in-situ thermal reaction. The method comprises the followingsteps (1), a titanium material is anodized; (2), a Ti4O7-TiN ceramic membrane is prepared by high temperature thermal reaction under hydrogen atmosphere; and (3), a beta-PbO2 active layer is electrodeposited on an anodic, and finally a Ti/Ti4O7-TiN/PbO2 coating anode is prepared. According to the method, the titanium dioxide-titanium nitride composite ceramic membrane with good conductivity, highcorrosion resistance and high strength (hardness) is obtained by utilizing electrochemical anodic oxidation and in-situ high-temperature thermal reduction, the composite ceramic membrane serves as a bottom layer to prepare the Ti/Ti4O7-TiN/PbO2 coating anode through anodic electrodeposition, and a novel titanium-based PbO2 coating anode with long service life and low energy consumption is finallyobtained; and moreover, the good conductivity of an electrode enables cell voltage in the electrochemical preparation and electrolysis processes of the electrode to be remarkably reduced, and the electric energy consumption can be saved.

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 Ti 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

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