Alkaline Fuel Cells Quiz
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Questions and Answers

Which type of fuel cell operates at a higher temperature?

  • Both operate at the same temperature
  • Phosphoric acid fuel cell (correct)
  • Alkaline fuel cell
  • Temperature is not mentioned in the text
  • What is the electrolyte used in an alkaline fuel cell?

  • Distilled water
  • Concentrated phosphoric acid
  • Dilute sulfuric acid
  • Aqueous solution of KOH (correct)
  • Why can carbon containing fuels not be used in an alkaline fuel cell?

  • CO2 formed damages the catalyst
  • CO2 formed clogs the fuel cell
  • CO2 formed is toxic to the environment
  • CO2 formed reacts with the electrolyte to reduce efficiency (correct)
  • What type of electro-catalyst is used in a phosphoric acid fuel cell?

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    Study Notes

    Fuel Cells Overview

    • High-Temperature Fuel Cell: Solid Oxide Fuel Cells (SOFC) operate at higher temperatures, typically between 600°C to 1000°C.
    • Electrolyte in Alkaline Fuel Cell: The electrolyte used is potassium hydroxide (KOH) solution, facilitating the electrochemical reaction.
    • Carbon Fuels Limitation: Carbon-containing fuels cannot be used in alkaline fuel cells because they can lead to carbon dioxide poisoning, which disrupts the reaction process.
    • Electro-catalyst in Phosphoric Acid Fuel Cell: Platinum or platinum-based alloys are commonly used as the electro-catalyst, enhancing the reaction rate and efficiency within the fuel cell.

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    Description

    Test your knowledge of alkaline fuel cells with this quiz! Learn about the electrolyte, operating temperature, oxygen reduction, electro-catalysts, and the impact of carbon-containing fuels on efficiency.

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