What are promising advanced or high-tech oxidation technologies?

Surely we have heard of technologies such as catalytic oxidation and electro-oxidation. However, unlike catalytic oxidation, the mechanisms behind electro-oxidation remain some what obscure. I have heard of ion generating machines that by means of ions and electric currents can "miniaturize" water molecules and thus purify them. Any ideas on what this might mean, or the actual mechanism behind such process? Furthermore, any other advanced oxidation technologies that might share a bright future?