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A kind of preparation method of highly active iridium-zirconium composite oxide inert anode

A composite oxide, inert anode technology, applied in electrodes, liquid chemical plating, coatings, etc., can solve the problems of limited large-scale application, high anode production cost, short anode life, etc., to achieve easy operation, equipment Few and simple, low equipment investment effect

Active Publication Date: 2021-03-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of use, it was found that Ti / RuO 2 Although the anode shows excellent oxygen evolution catalytic performance, which reduces the oxygen evolution overpotential of the anode during the electrolysis process, but in the sulfuric acid system, Ti / RuO 2 The service life of the anode is short, about 100 days, which restricts its application in the hydrometallurgical process
Ti / IrO 2 Although the oxygen evolution catalytic performance of the anode is slightly worse than that of Ti / RuO 2 Anode, but it shows good corrosion resistance in sulfuric acid system, its service life can reach more than 1 year, but iridium is expensive, Ti / IrO 2 The high production cost of the anode limits its large-scale application

Method used

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  • A kind of preparation method of highly active iridium-zirconium composite oxide inert anode
  • A kind of preparation method of highly active iridium-zirconium composite oxide inert anode
  • A kind of preparation method of highly active iridium-zirconium composite oxide inert anode

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0053] First, a titanium plate of 10mm×10mm×1mm was washed with alkali at 60°C for 30 minutes, etched with 10% oxalic acid at 90°C for 2.5 hours, ultrasonically cleaned with deionized water for 10 minutes, and then dried for use.

[0054] Weigh a certain mass of H 2 IrCl 6 Miscible with tetrabutyl zirconate.

[0055] The miscible H 2 IrCl 6 The mixed solution of tetrabutyl zirconate and tetrabutyl zirconate is dissolved in a mixed solvent of n-butanol and isopropanol mixed in a ratio of 1:1 to obtain a coating solution. H in the coating solution 2 IrCl 6 The molar concentrations of zirconate and tetrabutyl zirconate were 0.18 and 0.02 mol / L, respectively.

[0056] The prepared coating solution was evenly coated on the surface of the pretreated titanium substrate with a brush, dried at 120°C for 10 minutes, then sintered at 450°C for 10 minutes, and cooled to room temperature after taking it out. After the above steps were repeated 25 times, the anode plate was sintered ...

Embodiment approach 2

[0059] First, a titanium plate of 10mm×10mm×1mm was washed with alkali at 60°C for 30 minutes, etched with 10% oxalic acid at 90°C for 2.5 hours, ultrasonically cleaned with deionized water for 10 minutes, and then dried for later use.

[0060] Weigh a certain mass of H 2 IrCl 6 Miscible with tetrabutyl zirconate.

[0061] H 2 IrCl 6 The mixed solution with tetrabutyl zirconate is dissolved in a mixed solvent of n-butanol and isopropanol mixed in a ratio of 1:1 to obtain a coating solution. H in the coating solution 2 IrCl 6 The molar concentrations of zirconate and tetrabutyl zirconate were 0.14 and 0.06 mol / L, respectively. .

[0062] The prepared coating solution was evenly coated on the surface of the pretreated titanium substrate with a brush, dried at 120°C for 15 minutes, then sintered at 500°C for 15 minutes, and cooled to room temperature after taking it out. After the above steps were repeated 25 times, the anode plate was sintered at 500° C. for 1 hour to ob...

Embodiment approach 3

[0065] First, a titanium plate of 10mm×10mm×1mm was washed with alkali at 60°C for 30 minutes, etched with 10% oxalic acid at 90°C for 2.5 hours, ultrasonically cleaned with deionized water for 10 minutes, and then dried for later use.

[0066] Weigh a certain mass of H 2 IrCl 6 Miscible with tetrabutyl zirconate.

[0067] H 2 IrCl 6 The mixed solution with tetrabutyl zirconate is dissolved in a mixed solvent of n-butanol and isopropanol mixed in a ratio of 1:1 to obtain a coating solution. H in the coating solution 2 IrCl 6 The molar concentrations of tetrabutyl zirconate and tetrabutyl zirconate are both 0.10mol / L.

[0068] The prepared coating solution was evenly coated on the surface of the pretreated titanium substrate with a brush, dried at 120°C for 15 minutes, then sintered at 400°C for 15 minutes, and cooled to room temperature after taking it out. After the above steps were repeated 25 times, the anode plate was sintered at 400° C. for 1 hour to obtain a binar...

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Abstract

The invention discloses a preparation method for a high-activity iridium-zirconium-series compound oxide anode for hydrometallurgy. The high-activity iridium-zirconium-series compound oxide anode comprises an iridium-zirconium binary compound oxide inert anode, an iridium-ruthenium-zirconium ternary compound oxide inert anode, an iridium-cobalt-zirconium ternary compound oxide inert anode, an iridium-molybdenum-zirconium ternary compound oxide inert anode, an iridium-rubidium-zirconium ternary compound oxide inert anode and an iridium-ruthenium-rubidium-zirconium quaternary compound oxide inert anode. The prepared anode consists of a titanium substrate and an oxide coating, the zirconium dioxide and the rubidium oxide in the coating are amorphous phases, the iridic oxide and the rutheniumdioxide are rutile phases, the cobaltosic oxide is the spinel phase, the molybdenum trioxide is an alpha phase, the adding of the zirconium, or ruthenium or cobalt increases the oxygen evolution activity surface area of the anode, the anode activity is improved, and the adding of the rubidium or molybdenum improves the conductivity of the anode. The preparation method is simple in preparation process, the prepared anode has higher oxygen evolution catalytic activity and longer service life, and as the precious metal iridium element in the coating is replaced by the non-precious metal, the production cost of the anode is reduced.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a preparation method of an inert anode of a highly active iridium-zirconium composite oxide, including an inert anode of an iridium-zirconium binary composite oxide, an inert anode of an iridium-ruthenium-zirconium ternary composite oxide, an iridium-zirconium composite oxide inert anode, Cobalt-zirconium ternary composite oxide inert anode, iridium-molybdenum-zirconium ternary composite oxide inert anode, iridium-rubidium-zirconium ternary composite oxide inert anode and iridium-ruthenium-rubidium-zirconium quaternary composite oxide inert anode. Background technique [0002] With the continuous progress of society, there are stricter requirements on environmental pollution and energy consumption in industrial production, and energy conservation and emission reduction have become the theme of social development in the 21st century. In the past ten years, my c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/02C23C18/12
CPCC23C18/1216C25C7/02
Inventor 王成彦刘宝陈永强王硕
Owner UNIV OF SCI & TECH BEIJING
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