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Titanium anode coated with iridium possessing high cerium content and high oxygen separated activity

A technology of titanium anode and oxygen evolution, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., to achieve the effect of low oxygen evolution potential of electrodes, fine structure and convenient operation

Inactive Publication Date: 2007-02-07
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Looking at the literature, the rare earth elements and their oxides are used as electrocatalytic support materials, and IrO 2 The titanium anode as the catalytic active center has not been reported yet

Method used

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  • Titanium anode coated with iridium possessing high cerium content and high oxygen separated activity

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] After degreasing the 20mm×40mm titanium plate (Ta1) with alkaline washing powder, put it in a 10% (mass fraction) oxalic acid solution, boil it for 2 hours, take it out, rinse it with distilled water, dry it, and put it in an ethanol solution for later use. Weigh cerium nitrate (Ce(NO) according to Table 1 3 ) 3 ·6H 2 O) and chloroiridic acid (H 2 IrCl 6 ) was dissolved in an appropriate amount of n-butanol, and then the two solutions were mixed with each other. The above coating solutions with different ratios were evenly coated on the spare titanium plate, then dried, sintered at 500° C. for 10 minutes, and then taken out and cooled to room temperature. Recoat, sinter, and cool until all solution is applied. Finally, after annealing at 500 °C for 1 h, different molar contents of IrO can be obtained. 2 -CeO 2 Oxide coated anode. Its oxygen evolution potential is shown in Table 1. It can be seen that when the coating contains CeO 2 , the oxygen evolution poten...

Embodiment 2

[0025] After degreasing the 20mm×40mm titanium plate (Ta1) with alkaline washing powder, put it in a 10% (mass fraction) oxalic acid solution, boil it for 2 hours, take it out, rinse it with distilled water, dry it, and put it in an ethanol solution for later use. Weigh cerium nitrate (Ce(NO) according to Table 2 3 ) 3 ·6H 2 O), chloroiridic acid (H 2 IrCl 6 ) and SnCl 2 ·2H 2O is dissolved in an appropriate amount of n-butanol, and then mixed with each other. The above-mentioned coating solution was evenly coated on a spare titanium plate, dried, and sintered at 500° C. for 10 minutes, then taken out and cooled to room temperature. Recoat, sinter, and cool until all solution is applied. Finally, CeO can be obtained by annealing at 500 °C for 1 h. 2 -IrO 2 -SnO 2 Oxide coated anode. The oxygen evolution potential of the obtained titanium anode is shown in Table 2. It can be seen that the oxygen evolution potential ratio is completely determined by the IrO 2 The ox...

Embodiment 3

[0028] After degreasing the 20mm×40mm titanium plate (Ta1) with alkaline washing powder, put it in a 10% (mass fraction) oxalic acid solution, boil it for 2 hours, take it out, rinse it with distilled water, dry it, and put it in an ethanol solution for later use. Weigh cerium nitrate (Ce(NO) according to Table 2 3 ) 3 ·6H 2 O), chloroiridic acid (H 2 IrCl 6 ) was dissolved in an appropriate amount of n-butanol, and then mixed with each other. Weigh a certain amount of ruthenium chloride, tantalum pentachloride, butyl titanate (Ti(C 4 H 9 O) 4 ), stannous chloride, antimony nitrate, manganese chloride, cobalt chloride, nickel nitrate and other salts are respectively dissolved in dehydrated alcohol (components are shown in Table 3) successively, and citric acid and ethylene glycol are added dropwise dropwise respectively The mixed solution, after fully stirring, was prepared to form RuO 2 , Ta 2 O 5 , TiO 2 , SnO 2 , Sb 2 O 3 , MnO 2 , Co 3 O 4 and NiO 2 etc. ...

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Abstract

the invention discloses a Ti anode of Ir coating layer with high-oxygen active high- Ce content at 1:3-3:1 for IrO2:CeO2, which comprises the following steps: adopting H2IrO6 and Ce (NO3)3 .6H2O as source material; predisposing Ti base; allocating the coating liquid; preparing coating layer; making CeO2 as electric catalyst carrier material and IrO2 as electric catalyst center.

Description

technical field [0001] The invention relates to an oxide-coated titanium anode with high activity and stability for the electrolytic oxygen desorption reaction of sulfuric acid. Background technique [0002] The research and application of iridium oxide coatings began in the chlor-alkali industry. Compared with the electrocatalytic activities of other platinum group metal oxides, the electrocatalytic activity of iridium oxide for the generation of chlorine is not outstanding, but its electrocatalytic activity in acidic media is not outstanding. The electrocatalytic activity for oxygen evolution is second only to RuO 2 , in this medium can maintain high stability, showing excellent durability. This is due to the reversible oxygen adsorption of iridium, structurally speaking IrO 2 is a peroxygen structure (IrO 2+δ ), its catalytically active structure will not be destroyed by the infiltration of oxygen. These characteristics determine that the iridium-based oxide coating i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/08C25B11/10
Inventor 唐电邵艳群江嘉鹭
Owner FUZHOU UNIV
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