Bae, HyunSook Rao, Komateedi N. Ha, HeonPhil 2024-01-20T16:34:47Z 2024-01-20T16:34:47Z 2021-09-05 2011-07 1533-4880 https://pubs.kist.re.kr/handle/201004/130204 Pt/Al2O3 and Pt-Mg/Al2O3 nano composites were successfully prepared by dendrimer templated synthesis route. The obtained dendritic nanoparticles were dispersed in alumina support and they were evaluated for SCR of NOx using methane as reductant. Thermal analysis results of uncalcined samples revealed that the oxygen can accelerate the rate of dendrimer shell decomposition. X-ray diffractograms of 500 degrees C calcined samples disclosed the amorphous nature of materials, whereas 1000 degrees C air calcined samples showed enhanced crystallinity as well as diffraction pattern corresponding to Pt and PtO. HRTEM images of Pt-40-G4OH dendritic nanoparticles showed uniform particulate distribution with average particle size of 2.4 nm. The STEM results of 0.5 Pt/Al2O3 sample calcined at 500 degrees C exhibited a wide range of particles between 2 and 20 nm. This indicates the huge segregation of platinum metal particles during impregnation and subsequent calcination. Among the synthesized materials 0.5 wt% Pt/Al2O3 sample showed excellent conversion and selectivity for SCR of NOx. English AMER SCIENTIFIC PUBLISHERS REDUCTION PT/GAMMA-AL2O3 Structural Characterization and Catalytic Activity of Pt Dendrimer Encapsulated Nanoparticles Supported Over Al2O3 for SCR of NOx Article 10.1166/jnn.2011.4513 1 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.11, no.7, pp.6136 - 6140 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 11 7 6136 6140 scie scopus 000293663200098 2-s2.0-84856944239 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article REDUCTION PT/GAMMA-AL2O3 Pt/Al2O3 Dendrimers Encapsulated Nanoparticles SCR of NOx