Ceria based thermochemical cycles

A ceria based thermochemical cycle is a type of two-step thermochemical cycle that uses as oxygen carrier cerium oxides ( C e O 2 {\displaystyle CeO_{2}} / C e 2 O 3 {\displaystyle Ce_{2}O_{3}} ) for synthetic fuel production such as hydrogen or syngas. These cycles are able to obtain either hydrogen ( H 2 {\displaystyle H_{2}} ) from the splitting of water molecules ( H 2 O {\displaystyle H_{2}O} ), or also syngas, which is a mixture of hydrogen ( H 2 {\displaystyle H_{2}} ) and carbon monoxide ( C O {\displaystyle CO} ), by also splitting carbon dioxide ( C O 2 {\displaystyle CO_{2}} ) molecules alongside water molecules.

Source: Wikipedia — Ceria based thermochemical cycles (CC BY-SA 4.0)