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Structure and Hydrogen Adsorption Properties of SBA-15 Doped with Pd Nanoparticles

Title
Structure and Hydrogen Adsorption Properties of SBA-15 Doped with Pd Nanoparticles
Author
김재용
Keywords
Mesoporous Materials; SBA-15; Hydrogen Adsorption; Isotherm
Issue Date
2015-11
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v. 15, NO 11, Page. 8922-8925
Abstract
Hydrogen adsorption properties of Pd-doped Santa Barbara amorphous No. 15 (Pd-SBA-15) were investigated and the results were compared with pure SBA-15 ones in terms of change of its structure and Pd concentration. Pd-SBA-15 samples were prepared by a hydrothermal reaction, using mixture of PEO20PPO70PEO20 (P123) and tetraethyl orthosilicate (TEOS). For the doping of Pd on SBA-15, PdCl2 solution was added into the mixture of P123 and TEOS, and the solution was annealed at 80 degrees C for 2 hours under 800 Torr of hydrogen atmosphere. According to the X-ray diffraction and transmission electron microscope data, Pd-doped SBA-15 samples form a hexagonal array of mesoporous structure with 20 similar to 30 nm size of Pd particles. Values of specific surface area decreased from 630 to 414 m(2)/g as increasing the Pd doping level due to the increasing of the volume density. In fact, the volume density increased from 0.103 to 0.276 g/cc as increasing the mass ratio of PdCl2 to TEOS from 0 to 0.5. For the Pd-doped SBA-15, the amount of adsorbed hydrogen significantly increased from 0.49 to 0.99 wt% as increasing the Pd doping level from 0 to 0.5 demonstrating that Pd doping is an effect method for SBA-15 as a potential use of hydrogen storage application.
URI
http://www.ingentaconnect.com/content/asp/jnn/2015/00000015/00000011/art00103http://hdl.handle.net/20.500.11754/29102
ISSN
1533-4880; 1533-4899
DOI
10.1166/jnn.2015.11526
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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