“…Ceria (CeO 2 ) and cerium-based materials can be synthesized in nanoscale sizes, including nanosheets, nanoplates, nanoprisms and nanorods. [23][24][25] Indeed, CeO 2 and its precursor nanosheets (Ce 2 (CO 3 ) 2 , Ce(CO 3 ) 2 , and CeOHCO 3 ) have a large surface area and high catalytic activity, enabling them to be employed in various environmental, energy and oxygen sensing applications. 23,26,27 Further, CeO 2 and its precursor nanosheets can act as O-carriers owing to the characteristic redox behaviour of Ce 4+ /Ce 3+ .…”