期刊
JOURNAL OF MICROSCOPY
卷 252, 期 1, 页码 49-57出版社
WILEY
DOI: 10.1111/jmi.12067
关键词
HRTEM; TEM; EELS; multi-walled carbon nanotubes; catalysis; STEM; SEM; HAADF; BSE; spatial resolution; XEDS; platinum nanoparticles
类别
资金
- University of Puerto Rico (UPR)
- U.S. National Science Foundation (NSF)
- National Aeronautics SpaceAdministration (NASA)
- Consejo Nacional de Ciencia y Tecnologia [116157]
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.
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