Catalyst for thermochemical water splitting

A method for the generation of hydrogen from water and/or the generation of carbon monoxide from carbon dioxide comprising:

• reducing at least part of a catalyst at a first elevated temperature to produce diatomic oxygen;
• contacting the catalyst with at least one of water and carbon dioxide at a second elevated temperature;
• and
• oxidizing the at least partially reduced catalyst to generate the hydrogen and/or the carbon monoxide;
• wherein the second elevated temperature may be the same or different from the first elevated temperature;
• and
• wherein the catalyst comprises a solid solution of cerium dioxide and uranium dioxide.