The spatial distribution of cerium valence in H2-reduced model planar Pd/Ce0.7Zr0.3O2 catalysts was determined by electron energy loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). Spherical reduction zones were found beneath each Pd particle, consistent with a Pd-catalyzed, oxygen anion diffusion-limited bulk oxide reduction process. Evidence was also found for a more extended surface reduction process, possibly associated with hydrogen spillover from the Pd particles.
Revised: April 19, 2013 |
Published: April 1, 2013
Citation
Zhang S., M.B. Katz, K. Sun, O.K. Ezekoye, M.I. Nandasiri, H.W. Jen, and G.W. Graham, et al. 2013.Spatial Distribution Of Cerium Valence In Model Planar Pd/Ce0.7Zr0.3O2 Catalysts.Journal of Catalysis 300.PNNL-SA-91985.doi:10.1016/j.jcat.2013.01.013