IrO2 seed embedded iridium coating titanium anode and preparation method thereof
A titanium anode and seed technology, applied in the direction of coating, metal material coating process, electrode, etc., to achieve the effect of simplified process control, stable activity and easy coating structure
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[0019] 2) IrO 2 Seed preparation:
[0020] will be commercially available H 2 IrCl 6 Dissolved in butanol to form a solution, H 2 IrCl 6 The molar concentration is 1.0~3.0mol / L. After the solution is slowly dried under stirring, it is thermally decomposed at a temperature of 500-550°C, that is, it is formulated into rutile IrO with a nanoscale particle size of 2 seed;
[0021] 3) Contains IrO 2 Preparation of active coating solution for seeds:
[0022] For the unit iridium oxide coating, weigh H 2 IrCl 6 And step 2) the nanometer IrO of preparation 2 Seeds, the former is dissolved in butanol to form an active solution, according to the surface state of the substrate, the H in the active solution 2 IrCl 6 The molar concentration is 0.02-2.0mol / L. Nano IrO 2 The seeds are mixed into the active solution under stirring to prepare the active coating solution containing seeds;
[0023] For binary or multi-component iridium oxide coatings, take the representative Ir-Ta ...
Embodiment 1
[0029] Prepared by adding 20% IrO 2 The seeded Ir-Ta oxide-coated titanium anode. The specific steps are: 1) The area with a thickness of 1.5mm is 20cm 2 TA2 was washed with 5% washing powder solution, soaked in 10% oxalic acid solution for 2 hours, washed with water, and dried. 2) put H 2 IrCl 6 Dissolve in butanol to form a solution with a molar concentration of 1.0-3.0 mol / L. After slow drying, the solution will be thermally decomposed at a temperature of 520°C to form IrO with a scale of about 18nm. 2 seed. 3) Weigh H 2 IrCl 6 and IrO 2 Seeds, the former is dissolved in butanol to form an active solution, and the H in the solution 2 IrCl 6 The molar concentration is 0.05mol / L. Nano IrO 2The seeds are mixed into the active solution in a stirring state to prepare the seed-containing active coating solution. 4) Coating the coating solution on the titanium substrate, drying it and performing oxidation treatment at 550° C. in a muffle furnace. 5) Repeat coating, ...
Embodiment 2
[0032] Prepared with additions of 0%, 10%, 20% and 30% IrO 2 Seeded 70%Ir-30%Ta oxide coated titanium anode. The specific steps are: 1) The area with a thickness of 2.0mm is 10cm 2 TA2 was washed with 5% washing powder solution, soaked in 10% oxalic acid solution for 2 hours, washed with water, and dried. 2) put H 2 IrCl 6 Dissolve in butanol to form a solution with a molar concentration of 1.0-3.0 mol / L. After slow drying, the solution will be thermally decomposed at a temperature of 520°C to form IrO with a scale of about 18nm. 2 seed. 3) The coating composition of the Ir-Ta oxide coated titanium anode is designed according to the general molar ratio of Ir:Ta=70:30, and weighed according to the addition of 0%, 10%, 20% and 30% of the total Ir amount. Take IrO 2 Seeds to prepare containing IrO 2 Seeded 70%Ir-30%Ta oxide coated titanium anode. its specific H 2 IrCl 6 , TaCl 5 and nano-IrO 2 The weighing ratio of seeds is shown in Table 1, and the first two are diss...
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