What is the role of the metal oxide coating on the titanium

What is the role of the metal oxide coating on the titanium anode?
By covering different coatings, the electrical conductivity and electrocatalytic activity are enhanced, the electrolytic reaction process is promoted, and the service life of the anode in different operating environments is extended, and the expected results are achieved.
The primary catalytic reaction is the precious metals in the coating. Only if the precious metal content meets the requirements for use can the anode work normally.