Structure and Facet Characterization of Platinum Nanoparticles Loaded on Carbon Black Particles using HRTEM
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 11
Abstract
The atomic structure of platinum nanoparticles (Pt NPs) loaded on carbon black (CB) particles was investigated using high-resolution transmission electron microscopy (HRTEM). The Pt NPs were inhomogeneously strained and approximated as monoclinic structures. No correlation was observed between the monoclinic lattice parameters and the size of Pt NPs. About 80 % of the Pt NPs were compressively strained, and about 20 % of the Pt NPs were expansively strained. Side-view HRTEM analyses of Pt NPs were performed for specimens milled by a focused ion beam apparatus (FIB). The (111), (100), and (110) facets of the Pt NPs were observed to be adhered to CB particles. The frequency of Pt NP-CB adhesion interfaces decreased in the order of (111), (100), and (110) facets. This order was consistent with the (111), (100), and (110) planar packing fractions of Pt, the observed frequencies of (111), (100), and (110) facets of Pt NPs, and the (111), (100), and (110) surface energies of Pt. Further, variation of (111) interplanar spacing of Pt NPs on CB particles was measured as a function of azimuth angle of the (111) planes, and no correlation was observed between the variation of (111) interplanar spacing and the azimuth angle.
Authors and Affiliations
Kun’ichi Miyazawa, Shuichi Shimomura, Masaru Yoshitake, Yumi Tanaka
Keywords
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- EP ID EP409200
- DOI 10.9790/9622-0811011321.
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