The growth morphology and structure of ceria nano-islands on a stepped Au(788) surface has been investigated by scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). Within the concept of physical vapor deposition, different kinetic routes have been employed to design ceria-Au inverse model catalysts with different ceria nanoparticle shapes and arrangements. A two-dime...

Ultrafine Pt nanoparticles loaded on ceria (CeO2) are promising nanostructured catalysts for many important reactions. However, such catalysts often suffer from thermal instability due to coarsening of Pt nanoparticles at elevated temperatures, especially for those with high Pt loading, which leads to severe deterioration of catalytic performances. Here, a facile strategy is developed to improv...

Porous cerium oxide (ceria) nanoparticles were prepared with and without manganese (Mn) by using the flash combustion technique. Samples different loadings (Ce/Mn ratio ranged from 100 to 10) a one-step process water only as solvent. Moreover, citric acid was utilized fuel in an aqueous medium, overall synthesis mixture dried at °C overnight then calcinated 550 for 3 h. The obtained final solid...

Nanostructured Au–ceria is a promising new catalyst for low-temperature water-gas shift (LTS). Preparation, characterization, and catalytic properties of this material are reported in this paper. Gold–ceria was prepared by deposition–precipitation (DP), coprecipitation (CP), and gelation methods. The gold loading was varied between 1 and 8.3 at.%, while lanthanum used as a dopant in ceria, was ...

Interactions between ceria (CeO2) and supported metals greatly enhance rates for a number of important reactions. However, direct relationships between structure and function in these catalysts have been difficult to extract because the samples studied either were heterogeneous or were model systems dissimilar to working catalysts. We report rate measurements on samples in which the length of t...

Ceria (CeO2) nanoparticles are known to be very often used in various applications from biomedicine fuel cells. To optimize the applications, detailed information about physicochemical properties such as size, shape, and charge of should available. Therefore, our study we performed a systematic ceria ranging synthesis comprehensive experimental theoretical characterization. We synthesized using...

Understanding and controlling the performance of ceria nanoparticle (CNP) catalysts requires knowledge of the detailed structure and property of CNP surfaces and any attached functional groups. Here we report thermogravimetric analysis results showing that hydrothermally synthesized ∼30 nm CNPs are decorated with 12.9 hydroxyl groups per nm(2) of CNP surface. Quantum mechanical calculations of ...

A Bayesian/Maximum entropy (MaxEnt) method is applied to quantify the broadening of Xray line profiles in terms of the nanocrystallite size effects in ceria. The analysis is in general agreement with transmission electron microscopy results, while demonstrating the importance of appropriate a priori information needed in the method. The analysis also identifies other microstructural effects, su...

Medical applications of the superantioxidant ceria nanoparticles (CeNP) are limited due to their high toxicity and low stability. CeNP toxicity is related to their aggregation in solution, and the possible generation of reactive oxygen species (ROS) by a Fenton-like reaction. For the efficient medical application of CeNP, it is necessary to find new solutions, which simultaneously reduce their ...