Author/Authors :
S. Zhang، نويسنده , , M.B. Katz، نويسنده , , K. Sun، نويسنده , , O.K. Ezekoye، نويسنده , , M.I. Nandasiri، نويسنده , , H.-W. Jen، نويسنده , , G.W Graham، نويسنده , , X.Q. Pan، نويسنده ,
Abstract :
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.
Keywords :
H2S , Sulfur incorporation , Dibenzothiophene , Molybdenum phosphide , Hydrodesulfurization
