chapter  15
Fundamental Aspect of Photoelectrochemical Water Splitting
ByGyan Prakash, Sharma Arun, Prakash Upadhyay, Dilip Kumar Behara, Sri Sivakumar, Raj Ganesh S. Pala
Pages 24

Photoelectrochemical (PEC) cells are special classes of electrochemical cells, wherein at least one of the electrodes is photoresponsive. More broadly, PEC cell is defined as an electrochemical cell that can convert light energy into a more useful energy product through light-induced electrochemical processes. In PEC cells, water splits into hydrogen and oxygen with the aid of photocatalyst, which absorbs the photon energy and converts it to electrochemical energy (in the form of chemical bonds of hydrogen and oxygen) [1–3]. This is one of the most prominent ways of producing clean and cost-effective hydrogen by taking into account all photons that continuously strike the earth’s surface.