hydrogen-oxygen fuel cells

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6 Terms

1
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energy transfer

chemical → electrical

2
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equation for hydrogen fuel cell reaction

2H2 + O2 → 2H2O

3
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gases used to generate electricity in a fuel cell

hydrogen, oxygen

4
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fuel cell

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5
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advantages of hydrogen fuel cells

  • hydrogen can be produced by water so its renewable

  • does not produce any pollution (only produces water. theres no CO2)

  • more energy per kg than petrol or diesel

  • quieter so less noise pollution compared to a petrol engine

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disadvantages of a hydrogen fuel cell

  • electrolysis of water requires large amounts of energy

  • materials used to make fuel cells are expensive

  • hydrogen is more difficult and expensive to store (highly flammable and easily explodes under pressure)

  • fuel cells are affected by low temperatures (less efficient)

  • small number of hydrogen filling stations across the country