Synthesis and characterization of electrodeposited samaria and samaria-doped ceria thin films

Samaria (Sm2O3) and samaria-doped ceria (SDC) films are electrochemically deposited on stainless steel in view of a potential use in solid oxide fuel cells. As it is possible to deposit separately pure ceria (CeO2) and pure samaria (Sm2O3) in similar conditions, SDC films were successfully obtained in one electrochemical conditions set. Thin films have been fabricated at low-temperature (30 °C) by applying a cathodic potential of −0.8 V/SCE, for 2 h. Structural and morphological properties of electrodeposited films have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), techniques and Raman spectroscopy. Special attention has been focused on the Raman spectroscopy study to emphasize the effect of heat treatment and samarium doping. Despite cracks, single SDC phase was obtained crystallizing in a cubic symmetry.

Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► It reported hereby on the electrochemical deposition of pure Sm2O3 and samaria-doped ceria SDC-films at low-temperature (30 °C). ► A detailed analysis of the composition, structural, morphological and vibrational properties of SDC electrodeposited films are presented. ► Effects of thermal annealing on the evolution of the material properties of Sm2O3 and SDC by means of XRD and Raman spectroscopy were analyzed. ► Presented results indicate that electrochemical Sm2O3 and SDC-films are good for further studies in applications as protective coatings against corrosion of different metallic surfaces and in solid oxide fuel cell.