Ceria in Solid Oxide Fuel Cell Electrodes

7 Ceria in Solid Oxide Fuel Cell Electrodes 

As will be discussed later, a reaction like (12.46) is highly unlikely to occur in one step even for the simplest hydrocarbon, CH4. 

Great care should therefore be exercised when data from the catalytic literature relating to the Mars-van Krevelen type of catalysts 

An electrocatalyst lowers the acdvadon energy for an electrochemical reacdon without altering the reacdon equilibrium, similar to a tradidonal catalyst. In pracdce, this is seen as a decrease in the overpotendal of the electrochemical reacdons. The electrocatalyst may consdtute the endre electrode or be an addidon to a composite electrode. It need not necessarily be an electronic conductor, but the electrode as such must naturally be electronically conducting. 

This is needed in order to facilitate the electrochemical reactions and to collect/deliver the electrons/ions from/to the reaction sites with minimal ohmic losses. 

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Ceria in solid oxide fuel cell electrodes... 

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