Samarium Doped Cerium Oxide

Gallate/Samarium Doped Cerium Oxide/Strontium Iron Cohaltite... 

Nie, L., Liu, M., Zhang, Y., and Liu, M., Lao.6Sro.4Coo.2Feo.803 <5 cathodes infiltrated with samarium-doped cerium oxide for solid oxide fuel cells, 195, 4704-4708. Copyright 2010, with permission from Elsevier. 

Lu, B, and Lin, Y,S. (2014) Asymmetric thin samarium doped cerium oxide-carbonate dual-phase membrane for carbon dioxide separation, Ind. Eng. Chem. Res., 53, 13459-13466,... 

Various ceria-based mixed oxides have been prepared by ball milling, including samarium-doped cerium oxide," Ce02-Zr02, ... 

For a higher conductivity, cerium dioxide can be doped either with gadolinium Cei cGd (02 or with samarium Cex jSmj02 doped cerias are quite stable chemicdly. In solid oxide fuel cells they lack the effect of interactions between the electrolyte and the cathode materials that would lead to the formation of poorly conducting compounds. However, doped cerias have an important defect in that at low oxygen partial pressures (such as those existing close to the anode) they develop a marked electronic conduction. This is entirely inadmissible for the electrolyte, as it leads to internal self-discharge currents and even to a complete internal short circuit. The electronic conduction comes about when Ce" ions in the lattice are partly reduced to Ce " ions, which creates the possibility for electrons to hop between ions of different valency. 

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