Ceria nanoparticles (nano-ceria) have recently gained a wide range of applications, which might pose unwanted risks to both the environment and human health. The greatest potential for the environmental discharge of nano-ceria appears to be in their use as a diesel fuel additive. The present study was designed to explore the pulmonary toxicity of nano-ceria in mice after a single exposure via i...

Ceria- and urea-doped activated biochars were used as support for Ni-based catalysts CO2 methanation purposes. Different materials prepared tested to find the best catalytic formulation. After several experiments—carried out at 0.35–1.0 MPa 300–500 °C—it was found that most suitable catalyst a wheat-straw-derived biochar loaded with 30 wt.% of CeO2 20 Ni. Using this catalyst, conversion 65% CH4...

The oxidation of methane, ethane, propane, and n-butane has been studied over CeO2 and Ce0.8Sm0.2Ox (SDC) catalysts. The rates for methane and ethane were found to be indistinguishable over the two catalysts, while the rates for propane and n-butane were much higher on ceria compared to SDC. The difference between n-butane oxidation over ceria and SDC is shown to result from a low-temperature r...

   In the present work, Gadolinium Doped ceria (GDC) based solid electrolyte was successfully synthesized through wet chemical method to operate at intermediate temperature (500–700°C) for SOFCs. DSC study revealed the formation of GDC phase at 900°C during calcination. The crystal structure of GDC was identified as cubic fluorite phase and the crystallite size was found to be around 23 nm....

a synthesis of doped ceria by combustion method is performed. two types of fuel such asurea and glycine is used to investigate the effect of fuel reactivity and reaction rate on themorphology of the resulted powders. thermo gravimetric analysis is carried out by (tg/dta,rigaku thermalplus tg 8120) to study the exo–endo temperature of as-received powder. thecrystalline phases are identified by x...

Ceria has proven to be an excellent ion-transport and ion-exchange material when used in polycrystalline form with a high-concentration of aliovalent doped cations. Despite its widespread application, the impact atomic-scale defects this are scarcely studied poorly understood. In article, using first-principles simulations, we provide fundamental understanding atomic-structure, thermodynamic st...

CINSO (Centro de INvestigaciones en SOlidos) CITEFA-CONICET Juan Bautista de La Salle 4397, Villa Martelli (B1603ALO) Buenos Aires, Argentina dlamas@citefa. gov.ar;[email protected]

Title of Document: MODEL DEVELOPMENT FOR GADOLINIADOPED CERIA-BASED ANODES IN SOLID OXIDE FUEL CELLS Lei Wang, Doctor of Philosophy, 2014 Directed By: Professor Gregory S. Jackson, Department of Mechanical Engineering Intermediate temperature (500 700 °C) solid oxide fuel cells (IT-SOFCs) with gadolinia-doped ceria (GDC) electrolytes have significant commercial potential due to reduced material...