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A fuel cell is an electrochemical energy conversion
device that turns the chemical energy into electric
energy and is considered the most important green energy
source with high efficiency, and almost no emission. A
Fuel cell consists of two electrodes(anode and cathode)
and a electrolyte membrane. Hydrogen fuel is fed into
the anode, oxygen or air enters into cathode. By
electrode catalyst, the hydrogen in the anode split into
protons and electrons. The protons pass through the
electrolyte membrane while the a electron through
external circuit. In the cathode , oxygen or air react
with the electrons and protons, creating water, heat and
electric energy. In addition to this pure hydrogen type,
there are hydrocarbon fuels for fuel cells, including
methanol and chemical hydrides. The by-products with
these types of fuel are carbon dioxide and water.
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