Composite porous electrode for sulfuric acid system and preparation method thereof

A porous electrode and sulfuric acid system technology, applied in the field of electrochemistry, can solve problems such as the difficulty of direct compounding of substrates and porous layers, complex casting devices and casting processes, shortening the life of composite porous electrodes, etc., to achieve easy control of the seepage process and high yield , the effect of a reasonable structure
CN101949031AInactive Publication Date: 2011-01-19CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2011-01-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a composite porous electrode for a sulfuric acid system and a preparation method thereof. From inside to outside, the electrode is sequentially provided with an enhanced metal substrate, a Pb or Pb-based alloy (Pb-Me') transition layer and a Pb or Pb-based alloy (Pb-Me'') porous layer. The preparation method for the electrode comprises the following steps of: preparing the transition layer by performing chemical plating and metal melt immersion plating in the molten salts of chlorides or directly by performing the metal melt immersion plating, and preparing the porous layer by adopting an infiltration method or an antigravity infiltration method. Due to the adoption of the transition layer, the enhanced metal substrate and the porous layer in the composite porous electrode are combined more firmly, even electrolyte cannot permeate into and corrode the substrate through the porous layer, and the electrode has longer service life. The method of the invention has the advantages of preparing the composite porous electrode with firm combination among composite layers, strong strength, high corrosion resistance and long service life, and solving the long-term problems of short service life and weak strength of the electrode in the sulfuric acid system, along with simplicity and rational structure.
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Description

technical field

[0001] The invention relates to a composite porous electrode for a sulfuric acid system and a preparation method thereof, in particular to a preparation method of a composite porous anode for metal electrowinning or electroplating and a composite porous electrode for organic electrosynthesis. It belongs to the field of electrochemical technology. Background technique

[0002] Sulfuric acid is a widely used electrolyte, but its strong corrosive properties make few anodes that can be used in this electrolyte system. Pb or Pb-based alloy electrodes can form a layer of PbO with strong corrosion resistance when anodized in sulfuric acid solution. 2 It has become the most commonly used electrode material in the sulfuric acid electrolyte system, especially as an insoluble anode for metal electrodeposition or electroplating and as a corrosion-resistant cathode or anode for organic electrosynthesis.

[0003] The current density of organic electrosynthesis is general...

Claims

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