Fuel cells can be defined as devices which convert chemical energy into electrical energy. They have a potential capability for promising energy systems. Especially, as a clean and renewable energy source, fuel cells have very significant importance. There are many types of fuel cells such as alcohol, hydrogen, biofuel cells etc. This chapter examines the general electrochemistry of fuel cells. Furthermore, the basis of a fuel cell, fuel cell chemistry, substrates and potentials, electrochemistry, types of the electrode, potentiostats have been examined in detail. Besides, the electrochemistry characterization techniques, polarisation and power curves, microbial fuel cell and their reactions, limitations of the electrochemical reactions are also described in detail.

Burhan, Hakan/0000-0002-2293-7369; Arikan, Kubilay/0000-0002-9745-8493