About Hydrogen Operated Cars
Hydrogen cars are vehicles that are designed to operate on hydrogen energy. Fuel cells or a combustion type of hydrogen engine are two options for powering hydrogen vehicles.
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Energy Carrier
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Hydrogen is not an energy source but a carrier of energy. Hydrogen as a fuel source to power vehicles is still under development because it's hard to properly use the energy contained within hydrogen.
Fuel Cells
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Fuel cells within a hydrogen vehicle operate the auto by having oxygen and hydrogen pass over two electrodes, which in turn produces electricity, water and heat. This energy then is used to power an electric motor.
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Efficiency
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A huge amount of energy is needed to isolate hydrogen for fueling purposes, and since hydrogen can be found in various sources (such as gas or oil), the fuel is only as clean as the source that produced the hydrogen.
Storage
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Storing liquid hydrogen can be unsafe if the vehicle doesn't have the ability to let some of the fuel evaporate. This evaporation of fuel can cause a vehicle to lose up to half of its fuel supply within a couple of weeks.
Cost
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Hydrogen production is impractical for meeting the fueling needs of people today. Fuel cells are more expensive when compared to other types of fueling alternatives and hydrogen fuel uses only 75 percent of its power when it's manufactured from other fuel sources.
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