Effect of samarium doping on electrodeposited CeO₂ thin film

Abstract

Samarium-doped cerium oxide (CeO 2 : Sm) and undoped cerium oxide (CeO 2 ) thin films were fabricated by electrodeposition on biaxially textured Ni -3% W substrates. The electrodeposited layers were annealed for several hours at temperatures ranging from 910 to 980 °C. The resulting crystalline films were investigated by XRD and SEM. The CeO 2 crystallite size was correlated to the formation of microcrack in CeO 2 and CeO 2 : Sm using the Scherrer equation of XRD analysis. Crack-free films with an average grain size of about 28 nm were obtained for both Ce 0.92 Sm 0.08 O 2-δ and Ce 0.8 Sm 0.2 O 2-δ films. Sm doping strongly affects the crystallite size, crystal structure, texture, and crack formation in ceria films. The lattice parameter a increases and crystallite size is reduced with increased Sm doping. All electrodeposited films are highly biaxially textured. When compared to Ni-based substrates, improvements in the out-of-plane and in-plane texture in ceria-and Sm-doped ceria films were achieved.

Evaluation of SmCo and SmCoN magnetron sputtering coatings for SOFC interconnect applications

“…Sm has also been used in SOFC applications as a dopant for ceria-based electrolytes, and a component in perovskite cathode materials. Doping ceria with Samaria (Sm 2 O 3 ) induces the least distortion of the parent lattice due to having the optimum radius, which causes no expansion or contraction in the ceria lattice [21]. As a component in an interconnect coating, it is supposed that Sm increases conductivity and provides higher oxidation resistance for metallic interconnects.…”

Samarium-Doped Ceria Nanostructured Thin Films Grown on FTO Glass by Electrodepostion

“…Cathodic method is also applicable to other metal cations taking part in the precipitation at high pH, such as Sm 3+ . Many teams detailed the ECD of ceria, but only a few studies deal with SDC and Sm films [23][24][25][26].The current study, as an extension of our previous work [20], reports on the possibility of doping nanostructured ceria by Sm 3+ , in view of enhancing its UV- …”

“…Cathodic method is also applicable to other metal cations taking part in the precipitation at high pH, such as Sm 3+ . Many teams detailed the ECD of ceria, but only a few studies deal with SDC and Sm films [23][24][25][26].…”

Chemical Bath Deposition, Electrodeposition, and Electroless Deposition of Semiconductors, Superconductors, and Oxide Materials

“…110,111 Cerium oxide (commonly called ceria) has applications in several key areas of coating technology. Ceria fi lm is a major component in a catalyst used for automobile exhaust pollution control, 112,113 which results from the ease of converting between Ce(+III) and Ce(+IV) oxidation states, thus allowing the release or uptake of oxygen under reducing or oxidizing conditions.…”