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Essay

fuel cells

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Issue:

Science

 

Written by:

Pamela N

 

Date added:

August 22, 2016

 

Level:

University

 

Grade:

A

 

No of pages / words:

2 / 366

 

Was viewed:

5343 times

 

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Essay content:

The protons are conducted through the membrane to the cathode, but the electrons are forced to travel in an external circuit (supplying power) because the membrane is electrically insulating. On the cathode catalyst, oxygen molecules react with the electrons (which have travelled through the external circuit) and protons to form water...
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The round-trip efficiency (electricity to hydrogen and back to electricity) of such plants is between 30 and 40%. In addition to pure hydrogen, researchers have used other, hydrogen-carrying fuels for fuel cells, including diesel, methanol and chemical hydrides. [edit] Efficiency A fuel cell typically converts the chemical energy of its fuel into electricity with an efficiency of about 50%...
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