Doping CeO2 with Pd atoms has been associated with catalytic CO oxidation, but current surface models do not allow CO adsorption. Here, we report a new structure of Pd-doped CeO2(111), in which Pd adopts a square planar configuration instead of the previously assumed octahedral configuration. Oxygen removal from this doped structure is favorable. The resulting defective Pd-doped CeO2 surface is...

In this work, the WGS performance of a conventional Ni/CeO2 bulk catalyst is compared to that of a carbon-supported Ni-CeO2 catalyst. The carbon-supported sample resulted to be much more active than the bulk one. The higher activity of the Ni-CeO2/C catalyst is associated to its oxygen storage capacity, a parameter that strongly influences the WGS behavior. The stability of the carbon-supported...

Cerium oxide (CeO2) thin films used liquid injection atomic layer deposition (ALD) for deposition and ALD procedures were run at substrate temperatures of 150°C, 200°C, 250°C, 300°C, and 350°C, respectively. CeO2 were grown on n-Si(100) wafers. Variations in the grain sizes of the samples are governed by the deposition temperature and have been estimated using Scherrer analysis of the X-ray dif...

It is known that high-energy fission products create serious damage in the crystal structure of nuclear fuel ceramics (UO2), leading to swelling and degradation of thermal properties. The damage process, being particularly important in the high-energy region, is investigated in this study. Cerium dioxide, CeO2, is one of the ceramics that have the same (fluorite) structure as UO2 and also a sim...

Atomic Surface Structures of Oxide Materials: From Single Crystals to Nanoparticles Yuyuan Lin Atomic surface structures of oxide materials are very important in many areas. Despite the importance, these structures are not fully understood, especially for the nanoparticles. In this study, the atomic surface structures of SrTiO3 single crystals, SrTiO3 nanocuboids, and CeO2 nanoparticles are inv...

The correlation between the occurrence state of surface Pd species Pd/CeO2 for lean CH4 combustion is investigated. Herein, by using a reduction-deposition method, we have synthesized highly active 0.5% PdO/CeO2-RE catalyst, in which nanoparticles are evenly dispersed on CeO2 nanorods CeO2-R. Based comprehensive characterization, revealed that uniformly with particle size distribution 2.3 ± 0.6...

Introduction Soot particles and NOx are the main pollutants from diesel engines. Good alternatives to abate these contaminants are the use of catalytic filters, which burn the soot particles, and NOx traps which adsorb the NOx during normal operation and released them during reduction cycles [1]. We recently studied BaK/CeO2 catalysts for this application[2]. Barium plays the role of NOx adsorb...