Electrolytic decomposition from water H2O to oxygen O2 (develops at the anode, the positive electrode) and hydrogen H2 (develops at the cathode, the negative electrode) is a well known process. Many people probably remember chemistry classes at school, when water electrolysis was used for the production of oxyhydrogen.
The technical requirements for electrolysis are at least two electrodes, an electrolyte and a current source. Chemical reactions occur when the electrodes submerged in the electrolyte are connected to the voltage generator. Which reactions proceed are ultimately dependent on the electrode material used.
A comprehensive mix of oxidizers is produced directly from water and its constituents when boron-doped diamonds are used as electrode material. These oxidizers cause an efficient reduction of organic contamination (CSB-reduction) and/or an efficient killing off of micro-organisms (disinfection).