h2/o2

• s

  A) cathode

  B) h2o

  C) o2

  D) H2

  E) anode

  
• overall redox REACTION?

  2H2 + O2 = 2H2O
• reaction at cathode?

  O2 + 4H+ + 4e = 2H2O
• advatange

  Highly efficient

  No CO2 or other pollutants
• disadvantage?

  relative costs

  Difficulties in accessing and storing H

  Risk of leaking H -> reacting explosively
• what do fuel cells require?

  Constant supply of reactants