As the pursuit towards emissions reduction intensifies with growing interest and nascent technologies, solid oxide fuel cells (SOFCs) remain an illustrious candidate for achieving our goals. Despite myriad advantages, SOFCs are still too costly for widespread deployment, even as unprecedented materials developments have recently emerged. This suggests that, in addition to informed materials sel...

Many important catalytic reactions take place at metal–oxide interfaces. However, their mechanisms are typically difficult to probe due the low concentration of active sites and lack highly sensitive spectroscopic methods. In this work, we analyze impact oxide reducibility on mechanism low-temperature CO oxidation over platinum nanoparticles supported ceria-based solid solutions. We demonstrate...

The effect of sulfur on the water-gas-shift (WGS) activity of Pd/ceria catalysts has been studied using steadystate rate measurements, pulse-reactor studies, and FTIR. After exposing Pd/ceria to SO2 at 673 K in an oxidizing environment, the WGS rates dropped to a value close to that observed on Pd/alumina. Both pulsereactor and FTIR measurements showed that cerium sulfates can be readily reduce...

The stability of palladium supported on ceria (Pd/CeO2) was studied during liquid flow transfer hydrogenation using primary and secondary alcohols as hydrogen donors. For primary alcohols, the ceria support was reduced to cerium hydroxy carbonate within 14 h and was a contributing factor toward catalyst deactivation. For secondary alcohols, cerium hydroxy carbonate was not observed during the s...

Title of Document: QUANTIFYING THE ROLE OF CERIUM OXIDE AS A CATALYST IN SOLID OXIDE FUEL CELL ANODES Steven C. DeCaluwe, Doctor of Philosophy, 2009 Directed By: Associate Professor Gregory S. Jackson, Department of Mechanical Engineering Solid Oxide Fuel Cells (SOFCs) are an important electrochemical power conversion device, due largely to their high efficiencies and ability to directly oxidiz...

Nickel/doped-ceria composites are promising electrocatalysts for solid-oxide fuel and electrolysis cells. Very often steam is present in the feedstock of the cells, frequently mixed with other gases, such as hydrogen or CO2 . An increase in the steam concentration in the feed mixture is considered accountable for the electrode oxidation and the deactivation of the device. However, direct experi...

A Ce0.5Pr0.5Ox soot combustion catalyst has been shaped combining this material prepared in two different structures (nanoparticles and MS-macroporous) a single active phase. Nanoparticles, by reversed microemulsion method, provide high activity to the hybrid material, MS structure, obtained hard template synthesis provides thermal stability improved soot-catalyst contact. nanoparticles present...

Ceria (CeO2) nanorods with well-defined surface planes can be synthesized and utilized for the hydrogenation of nitroaromatics. The CeO2 nanorods containing a {110} plane can efficiently and selectively catalyse the hydrogenation of nitroaromatics with N2H4 as a reducing agent, while nano-ceria with a {100} or {111} plane shows poor performance for the reaction.