For those especially inclined towards materials manipulation, one can produce platinized Ti substrate anodes in rather clandestine conditions. I have been doing a lot of tinkering around the development of the process and have had excellent results. There is no need to electroplate the platinum coating onto substrate. This approach can be tedious, complicated and not very easily reproduced. Instead simple pyrolysis of hexachloroplatinic acid solution in temperature controlled environment can be used and it shall yield a very satisfactory result considering the cost and simple reproducibility of the results.
Step 1. Take grade 1 or grade 2 Ti material, as the substrate used for anode must not be alloyed titanium, for it shall not hold up to the anodic potential in a cell without starting to dissolve and disintegrate. Sand the oxide coating off the titanium with emery paper. About 240-400 grit is fine enough. If one tries to polish the surface to a high sheen, it shall become highly hydrophobic and become unusable in later steps of the process. Store the cleaned substrates under alcohol to prevent premature oxide formation that block the surface. Try not to store the substrates for long periods of time (longer than a few hours) in the uncoated condition.
Step 2. Obtain hexachloroplatinic acid solution. Take one of the substrates, dry it from the alcohol and apply a thin coating of the hexachloroplatinic solution on the surface of Ti. Literally a fraction of a drop shall suffice to coat the size of substrate displayed (about 8cm2 in surface area). Take utter care to work with the solution! Protect your skin and surroundings from coming into contact with the platinic solution, it is very hazardous and the most potent sensitizer known. The effects on human body are permanent and irreversible.
Step 3. For this one needs a temperature controlled kiln that can achieve and hold a temperature of about 600C. Take the coated substrate and place it into the kiln for 10 minutes using a suitable support stand or other means. The kiln has to be vented as the hexachloroplatinic acid shall pyrolyse quickly with the release of fumes and fine Pt dust. It must be evacuated by the vent so as to not be breathed into ones lungs.
Step 4. After 5 minutes in the kiln, the substrate shall have a platinic coating on it. Take the sample out of the kiln and cool it (it can be cooled by tucking into water, or by means of an air flow). Wash the sample under running water to scrub off loose Pt particulate. Then wipe with paper and alcohol until no residues can be seen to come off. Do not be alarmed if the coating looks uneven and lots of it seem to come off during the scrubbing. It is a totally normal course of events. Dispose of the paper with Pt particulate on it in a wet condition. It might selfignite if left unchecked as the Pt dust is very fine and could display a catalytic effect. I have not yet observed such a mishap, but it pays to be aware of the danger.
Step 5. Repeat the steps of coating the substrate with another layer of hexachloroplatinic acid and the pyrolysis followed by cleaning off the loose particulates. Keep going until 4-5 coats of Pt have been applied at 600C. It shall yield an anode that will have a lifespan of about 700 hours in a perchlorate cell at the approximate current density of 100mA/cm2.
Step 6. Subject the anode to operation in a cell. Try to keep the applied voltage across the cell under 5V. There is no need to go high, as it shall passivate the anode prematurely and cut a good deal of lifespan off. The process of perchlorate formation works very nicely at low voltages on Pt coated anodes (thusly also at low anodic potential, which shall prevent excessive passivation of the Ti substrate).
One can upscale the process to larger substrates and acquire anodes of desired size for a larger setup: