Explain about methanol _oxygen fuel cell in few lines
Answers
Fuel cells are electrochemical devices capable of converting the energy of a chemical reaction into electrical energy without combustion and with virtually no pollution. Fuel cells are unlike batteries because fuel cells use chemical energy to directly create electrical energy as chemical reactants are continuously delivered to the fuel cell. Batteries store energy. Primary batteries such as alkaline cells are disposable. Secondary batteries such as lead-acid batteries are rechargeable. Still, the distinction is that a battery stores energy. Fuel cells are delivered fuel that is used to generate energy. When the fuel cell is not fueled, it has zero electrical potential. Fuel cells are typically used to produce a continuous source of electrical energy that competes with other forms of continuous electrical energy production, depending on the scale, such as the internal combustion engine, nuclear power, and coal-fired power stations as well as competing with primary and secondary batteries.
A reaction that produces electrons is an oxidation, and a reaction that consumes electrons is a reduction. These types of reactions must happen together, because electrons do not generally exist in the environment by themselves. An anode is the electrode where oxidation happens, and a cathode is the electrode where reduction happens, so electrons leave the anode and arrive at the cathode.