Catalytic Activity Enhancement for Oxygen Reduction on Epitaxial Perovskite Thin Films for Solid-Oxide Fuel Cells


  • This work was supported in part by the NSF (CBET 08-44526), DOE (SISGR DE-SC0002633), and King Abdullah University of Science and Technology. S.-J.A is grateful for financial support from the Korean Government (KRF-2008-357-D00119). The portion of research performed at ORNL CNMS was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. DOE.


original image

The active ingredient: La0.8Sr0.2CoO3−δ (LSC) epitaxial thin films are prepared on (001)-oriented yttria-stabilized zirconia (YSZ) single crystals with a gadolinium-doped ceria (GDC) buffer layer (see picture). The LSC epitaxial films exhibit better oxygen reduction kinetics than bulk LSC. The enhanced activity is attributed in part to higher oxygen nonstoichiometry.