Behavior of oxidized platinum nanoparticles on an aligned carbon nanotube forest

Journal Article · Fri Oct 14 04:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4961721· OSTI ID:22597638

Matsuda, Keita; Norimatsu, Wataru ^[1]; Arai, Shigeo; Kusunoki, Michiko ^[2]

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1. Department of Applied Chemistry, Nagoya University, Nagoya 464-8603 (Japan)
2. Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603 (Japan)

We observed and analyzed the behavior of platinum nanoparticles (PtNPs) supported on aligned-carbon nanotubes (CNTs) at high temperatures by X-ray photoelectron spectroscopy and high-resolution transmission electron microscope observations. We found that the PtNPs moved toward the inner-side along each CNT on which they were deposited. The mechanism of this behavior is related to the redox reaction of Pt with the carbon atoms in the CNT. We also performed in-situ observation of this process at a high temperature using an environmental transmission electron microscope under an oxygen atmosphere. We found that the PtNPs penetrated down into a high-density aligned CNT forest along the tube axis and that the PtNPs changed their shape to fit the structure of the CNTs during their movement.

• OSTI ID: 22597638
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 14 Vol. 120; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CARBON NANOTUBES
ELECTRONS
NANOPARTICLES
PLATINUM
REDOX REACTIONS
TEMPERATURE RANGE 0400-1000 K
TRANSMISSION ELECTRON MICROSCOPY
X RADIATION
X-RAY PHOTOELECTRON SPECTROSCOPY