and generate hydrogen by reaction with aqueous sodium hydroxide. He’s demonstrated it by generating enough hydrogen to make a cup of coffee, as you can see in the video below the break.

Automated hydrogen generator setup, courtesy of [Hyperspace Pirate]’s dog drinking bowl. Since electrolysis cannot occur with pure water, sodium hydroxide (NaOH) is used in the solution to ...

In this setup, a highly concentrated liquid electrolyte, such as potassium or sodium hydroxide, is used, and the two electrodes are separated using a porous inorganic diaphragm. The hydrogen gas ...