Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.


Fuel Cells

How fuel cells work; their advantages and disadvantages and where they are employed

Chiuyin Cheung

on 14 April 2010

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Fuel Cells

FUEL CELLS advantages disadvantages how they are used provide a clean alternative energy source hydrogen fuel cells
produce WATER as the only
byproduct how does it work? ? ? ? a video introduction in words... hydrogen molecules move to the anode
a platinum catalyst in the anode converts hydrogen gas into electrons and protons The Proton Exchange Membrane [PEM] allows only protons to pass through
forces the electrons to exit the cell, travelling through a wire to create an electrical current Oxygen gas moves to the cathode
meets with the protons emerging from the PEM
meets with the electrons the oxygen, protons, and the electrons, with the aid of a nickel catalyst, react to form WATER anode half-equation: 2H2 (g) 4H+(aq) + 4e¯(aq) cathode half-equation: O2 (g) + 4H+(aq) + 4e¯(aq) 2H2O(l) full equation: 2H2 (g)+ O2 (g) 2H2O (l) to recap: much more energy efficient than combustion engines due to lack of friction
produces less heat energy - less energy wasted
produces no greenhouse gases while in operation internal combustion engines have efficiencies of about 30%,
while hydrogen fuel cells have 40-70% efficiency the combustion of every litre of petrol releases 2.3kg of carbon dioxide.
hydrogen fuel cells release none. platinum catalyst at anode to ionise hydrogen is expensive
in cars, there must be a hydrogen store.a hydrogen tank may be dangerous if it bursts in a car crash
Full transcript