Synthesis of spherical and sizecontrolled Pt dendrimer-encapsulated nanoparticles for SCR of NOx

Title
Synthesis of spherical and sizecontrolled Pt dendrimer-encapsulated nanoparticles for SCR of NOx
Authors
Komateedi N. Rao유창용하헌필
Keywords
size-controlled synthesis; Pt dendrimer-encapsulated nanocomposites; PAMAM; Pt/Al2O3; DeNOx
Issue Date
2012-07
Publisher
Advanced composite materials : the official journal of the Japan Society of Composite Materials
Citation
VOL 21, NO 2, 123-131
Abstract
Highly active and selective alumina-supported Pt dendrimer-encapsulated nanocomposite materials were successfully prepared and evaluated for the selective catalytic reduction (SCR) of NOx using methane as reductant. The physicochemical properties of the prepared samples were investigated with X-ray diffraction (XRD), Brunauer Emmett Teller (BET) surface area, inductively coupled plasma mass spectrometry (ICP-MS), and transmission electron microscopy-energy-dispersive X-ray analysis (EDX) techniques. The resulted metallic Pt40 particles are spherical and well separated from each other. As derived from the transmission electron microscopy images, the average particle diameter of dendrimerencapsulated nanoparticles (DENs) is 2.4 nm. The diffraction profiles of fresh and used catalysts indicated that the prepared materials are highly stable after 40 h of time-on-stream reaction. For DENs Pt/Al2O3 sample, the distribution of platinum particle size ranged between 2 and 20 nm. In the present investigation, the N2 selectivity is attained more than 85% at 400 °C. In addition, the time-on-stream results revealed that the DENs Pt/Al2O3 catalysts are very effective on the reduction of NOx under wide temperature window.
URI
http://pubs.kist.re.kr/handle/201004/42879
ISSN
09243046
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE