Deposition of platinum nanoparticles on carbon nanotubes by supercritical fluid method.
Carbon nanotube-supported platinum nanoparticles with a 5-15 nm diameter size range can be synthesized by hydrogen reduction of platinum(ll) acetylacetonate in methanol modified supercritical carbon dioxide. X-ray photoelectron spectroscopy and X-ray diffraction spectra indicate that the carbon nanotubes contain zero-valent platinum metal and high-resolution transmission electron microscopy images show that the visible lattice fringes of platinum nanoparticles are crystallites. Carbon nanotubes synthesized with 25% by weight of platinum nanoparticles exhibit a higher activity for hydrogenation of benzene compared with a commercial carbon black platinum catalyst. The carbon nanotube-supported platinum nanocatalyst can be reused at least six times for the hydrogenation reaction without losing activity. The carbon nanotube-supported platinum nanoparticles are also highly active for electrochemical oxidation of methanol and for reduction of oxygen suggesting their potential use as a new electrocatalyst for proton exchange membrane fuel cell applications.
Yen
Clive H
CH
Department of Chemistry, University of Idaho, Moscow, ID 83844, USA.
Cui
Xiaoli
X
Pan
Horng-Bin
HB
Wang
Shaofen
S
Lin
Yuehe
Y
Wai
Chien M
CM
D001554:Benzene / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D003460:Crystallization; D004563:Electrochemistry; D006859:Hydrogen / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D010984:Platinum / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D014961:X-Ray Diffraction
D037742:Nanotubes, Carbon; D010984:Platinum; D002244:Carbon; D006859:Hydrogen; D001554:Benzene; D010100:Oxygen; D000432:Methanol