Explain the construction and working of H2 - O2 , fuel cell.
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Answer:
A fuel cell may be defined as a device that converts chemical energy from a fuel into electricity through a chemical reaction. The chemical reaction occurs in the presence of oxygen or an oxidizing agent.Hydrogen fuel cells are cells that contain hydrogen as the fuel. Hydrogen fuel is a zero emission fuel that releases energy during combustion or through electrochemical reactions. Fuel cells and batteries produce an electric current through a chemical reaction, but a fuel cell will produce energy as long as there is fuel, thus never losing its charge.Hydrogen is the simplest and most abundant element in the universe. Despite its abundance, hydrogen is rarely found in its pure form. Water is the chief source of hydrogen, hydrocarbons being the next in line in sources of hydrogen. Hydrogen can be extracted from its sources quite easily, in both renewable and non-renewable sources. Hydrogen fuel cells are one of the best option when switching over to sustainable energy systems.