Nanocrystalline iridium series oxide coating electrode preparation method
A technology of oxide coating and nanocrystals, which is applied in the field of electrochemical applications, can solve the problems of high oxygen evolution potential and short life, and achieve the effects of simple preparation, long life and low cost
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Embodiment 1
[0018] Embodiment 1. prepares IrO 2 -Ta 2 o 5 -SnO 2 Electrode: Cut the pure titanium plate without sandblasting and sandblasting into 20×25mm size, and then carry out alkali cleaning and pickling. Extract TaCl 5 -C 2 h 5 1.855ml of OH solution (Ta180g / L) and 3.48ml of chloroiridic acid (Ir119g / L) were placed in a weighing bottle and mixed evenly, then put in an oven and baked at 90°C for 10 hours until the mixture became a fine powder. Solvent was added to make the solution clear. Weigh tin protochloride (SnCl 2 2H 2 O), making SnO 2 The amount of substance accounted for by IrO 2 -Ta 2 o 5 -SnO 2 The amount of the total substance is 5-15%, and it is mixed with IrO 2 -Ta 2 o 5 solution mixed to prepare IrO 2 -Ta 2 o 5 -SnO 2 Coating solution. Use a soft plush pen to brush the coating solution on both sides of the titanium plate, dry it in an oven at 90°C for 5 minutes, then sinter it in a muffle furnace at 370°C for 5 minutes, take it out and air cool to r...
Embodiment 2
[0023] Embodiment 2. prepare IrO 2 -Ta 2 o 5 -SiO 2 Electrode: The pretreatment method of the titanium plate is the same as that of Example 1. Formulated IrO 2 -Ta 2 o 5 The solution was the same as in Example 1. Adding 0.227ml concentration is 25.5% acidic silica sol solution in it, makes SiO 2 7% by weight in it, made of IrO 2 -Ta 2 o 5 -SiO 2 Coating solution. Brush the coating solution on both sides of the titanium plate with a soft plush pen, dry it in an oven at 90°C for 5 minutes, then sinter it in a muffle furnace at 350°C for 5 minutes, take it out and air cool to room temperature, repeat the above steps until coating 3 floors. Then, it was still dried in an oven at 90°C for 5 minutes, but sintered in a muffle furnace at 350°C for 10 minutes, and so on until 10 layers were applied. Prepare the required nanocrystalline electrode, and use the Scherrer formula to calculate the IrO of the electrode coating through the X-ray diffraction analysis spectrum. 2 ...
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