Supercritical Fluid Synthesis and Characterization of Catalytic Metal Nanoparticles on Carbon Nanotubes
A rapid, convenient and environmentally benign method has been developed for the fabrication of metal nanoparticle/multiwall carbon nanotube (MWCNT) composites. Nanoparticles of palladium, rhodium and ruthenium are deposited onto functionalized MWCNTs through a simple hydrogen reduction of metal-?-diketone precursors in supercritical carbon dioxide, and are characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) analyses. These highly dispersed nanoparticles, with a narrow range of size distribution and good adhesion on MWCNT surfaces, are expected to exhibit promising catalytic properties for a variety of chemical reactions. Preliminary experiments demonstrate that Pd nanoparticles supported on MWCNTs are effective catalysts for hydrogenation of olefins in carbon dioxide. The Pd nanoparticle?MWCNT composite also shows a high electrocatalytic activity in oxygen reduction for potential fuel cell application.
- Research Organization:
- Pacific Northwest National Lab., Richland, WA (US), Environmental Molecular Sciences Laboratory (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 15007326
- Report Number(s):
- PNNL-SA-40131; 1573
- Journal Information:
- Journal of Materials Chemistry, Journal Name: Journal of Materials Chemistry Journal Issue: 5 Vol. 14; ISSN JMACEP; ISSN 0959-9428
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
ALKENES
CARBON
CARBON DIOXIDE
CATALYSIS
CATALYSTS
CHEMICAL REACTIONS
ENVIRONMENTAL MOLECULAR SCIENCES LABORATORY
CARBON NANOTUBES
FUEL CELLS
HYDROGEN
HYDROGENATION
OXYGEN
PALLADIUM
RHODIUM
RUTHENIUM
SUPERCRITICAL FLUID
CATALYSIS
FUEL CELL
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY PHOTOELECTRON SPECTROSCOPY
X-RAY SPECTROSCOPY