Multi‐walled carbon nanotubes decorated by platinum catalyst nanoparticles—Examination and microanalysis using scanning and transmission electron microscopies

Summary Carbon nanotubes (CNTs) decorated with platinum (Pt) nanoparticles (NPs) have been characterized using a cold field‐emission scanning electron microscope (SEM) and a high resolution field‐emission transmission electron microscope (TEM). With this particular composite material, the complement...

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Bibliographic Details
Published in:Journal of microscopy (Oxford) 2013-10, Vol.252 (1), p.49-57
Main Authors: GUINEL, M. J‐F., BRODUSCH, N., VERDE‐GÓMEZ, Y., ESCOBAR‐MORALES, B., GAUVIN, R.
Format: Article
Language:English
Subjects:
BSE
catalysis
Catalysts
Decoration
EELS
Electron microscopes
HAADF
HRTEM
multi‐walled carbon nanotubes
Nanostructure
Nanotubes
Nucleation
Platinum
platinum nanoparticles
Scanning electron microscopy
SEM
spatial resolution
Stacking faults
STEM
Surface chemistry
TEM
XEDS
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Summary:Summary Carbon nanotubes (CNTs) decorated with platinum (Pt) nanoparticles (NPs) have been characterized using a cold field‐emission scanning electron microscope (SEM) and a high resolution field‐emission transmission electron microscope (TEM). With this particular composite material, the complementary nature of the two instruments was demonstrated. Although the long CNTs were found to be mostly bent and defective in some parts, the nucleation of Pt occurred randomly and uniformly covered the CNTs. The NPs displayed a large variation in size, were sometimes defective with twins and stacking faults, and were found to be faceted with the presence of surface steps. The shape and size of the NPs and the presence of defects may have significant consequences on the activity of the Pt catalyst material. Also, thin layers of platinum oxide were identified on the surface of some NPs.
ISSN:0022-2720
1365-2818
DOI:10.1111/jmi.12067