Fuel Cell

Hydrogen fuel cells are units which produce electricity through a reaction of positively charged hydrogen ions with oxygen or another oxidixing agent, i.e. separating electrons from the oxidizing agent by having it react with the positively charged hydrogen ion. This is performed through the usage of a anode, a cathode, and a catalyst.

Oxidation state / number

degree of oxidation (loss of electrons) of an atom in a chemical compound.

Oxidation

loss of electrons or an increase in oxidation state by a molucule, atom, or ion.

Reduction

gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.