which elements do hydrogen fuel cells combine to produce electricity?
Fuel cells (batteries) provide another use option, just as they were utilized by NASA. Fuel cells basically reverse electrolysisâhydrogen and oxygen are combined to produce electricity. Hydrogen fuel cells are very efficient and produce only water as a by-product, but they are expensive to build. With technological advances, small fuel cells could someday power electric vehicles and larger fuel cells could provide electricity in remote areas. Because of the cost, hydrogen will not produce electricity on a