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Hydrogen Fuel Cell versus Hydrogen Generator

A hydrogen fuel cell should not be confused with a hydrogen generator as these are two completely separate technologies. A hydrogen fuel cell, usually called a proton exchange membrane (PEM) fuel cell, uses compressed hydrogen gas from 3,600 psi to 10,000 psi to generate electricity to turn one or more electric motors on a fuel cell vehicle (FCV).

Hydrogen on Demand Kit
Premium and low cost hydrogen and oxygen genrator (HHO) kit for your car, truck or other vehicle to increase mileage, decrease emissions.

Hydrogen fuel cell generator
Hydrogen fuel cell (top) and hydrogen generators (bottom)

A hydrogen generator, on the other hand, electrolyzes a small amount of water onboard and injects the resulting HHO gas into an internal combustion engine's intake system in order to supplement the gasoline, diesel or other fuel. So, in other words, a hydrogen generator for cars is supplementary fuel technology and a fuel cell uses hydrogen as the main power source for the automobile.

A hydrogen fuel cell vehicle works by storing compressed hydrogen gas onboard. This hydrogen gas is then directed to the fuel cell. Hydrogen is channeled to the anode side of the PEM fuel cell while outside air (including oxygen) is channeled to the cathode side.

A catalyst, usually made of platinum will split the hydrogen into positively and negatively charged ions. The ions traveling different paths along the membrane of the cell create an electrical current. When the hydrogen ions meet at the cathode side and join with the oxygen, water is formed as a byproduct. Heat is also the other byproduct of a PEM fuel cell.

A hydrogen generator, on the other hand, does not start with compressed hydrogen gas and does not generate electrical current. A hydrogen generator uses electrical current from the vehicle's battery or alternator to split water. The resulting oxyhydrogen gas is used to by the internal combustion engine to help the gasoline or diesel fuel burn more cleanly and completely.











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