About the book
Water electrolysis has a longer history than 200 years and the technology is expected to be applied in various fields, such as the realization of a hydrogen society, environmental conservation, sterilization and cleaning, and water purification. When water is electrolyzed, dozens of kinds of ions and radicals are formed, but the stable molecules formed by electrolysis are only four: hydrogen, oxygen, ozone, and hydrogen peroxide.
Hydrogen gas is the key energy source for hydrogen-based society. Ozone dissolved water is expected as the sterilization and cleaning agent that can comply with the new law enacted by the US Food and Drug Administration (FDA). The law “FDA Food Safety Modernization Act” requires sterilization and washing of foods to prevent food poisoning and has a strict provision that vegetables, meat, and fish must be washed with non-chlorine cleaning agents to make E. coli adhering to food down to “zero”. If ozone dissolved water could be successively applied in this field, electrochemistry would make a significant contribution to society.
Oxygen-enriched water is said to promote the growth of farmed fish. Hydrogen dissolved water is said to be able to efficiently remove minute dust on the silicon wafer when used in combination with ultrasonic irradiation.
At present researches on direct water electrolysis have shown significant progress. For example, boron-doped diamonds and complex metal oxides are widely used as an electrode, and the interposing polymer electrolyte membrane (PEM) between electrodes has become one of the major processes of water electrolysis.
The purpose of this book is to show the latest water electrolysis technology and the future of society applying it.