Titanium anode coated with iridium possessing high cerium content and high oxygen separated activity
A titanium anode and coating technology, 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
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Embodiment 1
[0022] After degreasing the 20mm×40mm titanium plate (Ta1) with alkaline washing powder, put it in 10% (mass fraction) oxalic acid solution and boil for 2 hours, take it out, rinse it with distilled water and dry it, then put it into ethanol solution for later use. Weigh cerium nitrate (Ce(NO 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-mentioned coating solutions with different proportions were uniformly coated on the spare titanium plate, then dried, sintered at 500°C for 10 minutes, and then taken out and air-cooled to room temperature. Coating is then performed, sintered, and cooled until all solution is coated. Finally, by annealing at 500°C for 1 h, IrO with different molar contents can be obtained. 2 -CeO 2 Oxide coated anode. The oxygen evolution potential is shown in Table 1. It can be seen that when the coating contains CeO 2 , the oxy...
Embodiment 2
[0026] After degreasing the 20mm×40mm titanium plate (Ta1) with alkaline washing powder, put it in 10% (mass fraction) oxalic acid solution and boil for 2 hours, take it out, rinse it with distilled water and dry it, then put it into ethanol solution for later use. Weigh cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), chloroiridic acid (H 2 IrCl6 ) and SnCl 2 2H 2 O was dissolved in an appropriate amount of n-butanol, and then mixed with each other. The above coating solution was evenly coated on the spare titanium plate, dried, sintered at 500°C for 10 minutes, and then taken out and air-cooled to room temperature. Coating is then performed, sintered, and cooled until all solution is coated. Finally, annealing at 500 ° C for 1 h can obtain CeO 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 oxygen evolution...
Embodiment 3
[0030] After degreasing the 20mm×40mm titanium plate (Ta1) with alkaline washing powder, put it in 10% (mass fraction) oxalic acid solution and boil it for 2 hours, take it out, rinse it with distilled water and dry it, then put it into ethanol solution for later use. Weigh cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O), chloroiridic acid (H 2 IrCl 6 ) were dissolved in an appropriate amount of n-butanol, and then mixed with each other. Take a certain amount of sodium chloride, tantalum pentachloride, and butyl titanate (Ti(C 4 h 9 O) 4 ), tin protochloride, antimony nitrate, manganese chloride, cobalt chloride, nickel nitrate and other salts were respectively dissolved in absolute ethanol (see Table 3 for the composition), and citric acid and ethylene glycol were added drop by drop respectively The mixed solution, after fully stirring, were 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. solution. Form the above into CeO ...
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