Članak o tome kako funkcioniraju - Povijest promjena

Mvrljac u (test) 00:17, 19. siječnja 2008.

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How a fuel cell works
IT GETS wet and hot and that’s all. This, in short, is the attraction of a fuel cell. In simple terms, it gobbles up hydrogen and combines it with oxygen from the air to generate electricity, avoiding combustion and by-products any nastier than water and heat.
Although there are rival varieties of fuel cell, the most promising is the proton-exchange membrane. This is a sandwich of two electrodes, a cathode and an anode, with an electrolyte stuffing called a polymer membrane placed in between.

At the anode, hydrogen gives up its electron with the help of a platinum catalyst. While the hydrogen passes across the membrane in the form of positively charged ions, its electrons, which cannot cross the membrane, instead stream around an external circuit, rather as electrons do if you connect the poles of a battery. And as with a battery, this current can power a car or a computer. When the hydrogen ions reach the cathode, they are reunited with electrons and combine with oxygen to create water and heat.
If the fuel that is used is pure hydrogen, then the process will live up to its clean image. But if the hydrogen is made on board by a “reformer” that consumes hydrocarbon fuels, such as methanol, natural gas or petrol, the whole process will be slightly polluting—though far less so than engines today.

@@ Redak 8: / Redak 8: @@
 Although there are rival varieties of fuel cell, the most promising is the proton-exchange membrane. This is a sandwich of two electrodes, a cathode and an anode, with an electrolyte stuffing called a polymer membrane placed in between.
 [[slika:Kako_radi_fuel_cell.gif|left]]
+        </td>
+</table>
 At the anode, hydrogen gives up its electron with the help of a platinum catalyst. While the hydrogen passes across the membrane in the form of positively charged ions, its electrons, which cannot cross the membrane, instead stream around an external circuit, rather as electrons do if you connect the poles of a battery. And as with a battery, this current can power a car or a computer. When the hydrogen ions reach the cathode, they are reunited with electrons and combine with oxygen to create water and heat.
 If the fuel that is used is pure hydrogen, then the process will live up to its clean image. But if the hydrogen is made on board by a “reformer” that consumes hydrocarbon fuels, such as methanol, natural gas or petrol, the whole process will be slightly polluting—though far less so than engines today.