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Calculation of Electrical Efficiency Produced by the Fuel Cell-Multiple Choice Question


A fuel cell converts the chemical energy in fuel and oxidant to electric energy (as shown in the figure to the right). The reversible potential for the hydrogen electrode, E0H2, is 0 volt versus the reversible hydrogen electrode (RHE). The reversible potential for the oxygen electrode, E0O2 is 1.2 volt vs. RHE   


A fuel cell is operating with a current density, j of 0.3A/cm2, and a cell voltage , Vcell of 0.6 volt, as it uses hydrogen as the fuel and oxygen as the oxidant. What is the electrical efficiency (given in%) produced by the fuel cell?

  1. 100%
  2. 75%
  3. 65%
  4. 50%
  5. None of the above



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