Answer:
The process of electrolysis of water, also known as electrochemical water splitting, is the use of electricity to decompose water into oxygen and hydrogen gas. This hydrogen gas can be used as hydrogen fuel, or it can be mixed with oxygen to make oxyhydrogen gas, which is used in welding and other purposes.
Water electrolysis requires a minimum potential difference of 1.23 Volts, but at that voltage, external heat from the environment is necessary.