首页|Multifunctional applications of gadolinium-doped cerium oxide(Ce1-xGdxO2-?)ceramics:A review
Multifunctional applications of gadolinium-doped cerium oxide(Ce1-xGdxO2-?)ceramics:A review
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Cerium oxide(CeO2),or ceria,and its doped derivatives have been extensively studied for several de-cades and are well-known oxides valued for their unique structural properties and wide range of ap-plications.These materials play a crucial role in sustainable development within society.Structural modification through defect engineering of the highly stable cubic fluorite phase enhances the versatility of this doped ceria to a new level.Among the numerous dopants of the CeO2 matrix,ceria doped with gadolinium(Gd),known as Ce1-xGdxO2-∂(CGO),is gaining popularity due to its multifunctionality.The introduction of defect-induced vacancies in the oxygen sublattice(Vo)and a change in the average valence of cerium(Ce3+/Ce4+)are primarily responsible for the improved performance compared to pristine CeO2.These materials are currently undergoing intensive research for potential use as electro-lytes in intermediate-temperature solid oxide fuel cells(IT-SOFCs)and dense oxygen-permeable mem-branes(OPMs).Additionally,they are being commercially utilized for power generation and oxygen separation.CGO materials are also attracting significant attention in various fields such as optics,pho-tocatalysis,electrostriction,spintronics,gas sensing,electrocatalysis,and biomedical applications.This review paper aims to compile the latest contributions to CGO materials and comprehensively cover their various application areas.The crystal structure,defect equilibrium in Gd3+-doped CeO2,the origin of multifunctionality,and the prospects of these materials are also exclusively discussed.
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