Transmission electron microscopy facet imaging

Here, pseudo zero-dimensional platinum particles refer to those simple shapes such as spheres and highly symmetrical platonic shapes, including tetrahedrons, octahedrons, cubes, tetrahexahedrons (THHs), and their truncated forms [70, 75, 155]. Some transmission electron microscopy (TEM) images of faceted particles that have been recently obtained and categorized as pseudo-zero-dimensional nanostructures, due to their small size, symmetrical shape and single crystalHne nature, are shown in Figure 10.6. Typically, spherical nanoparticles are composed... 

FIGURE 1.2 High-resolution transmission electron microscopy image of a supported Ru catalyst for ammonia synthesis recorded at 552°C and 5.2 mbar in a gas composition of 3 1 Hj/Nj. A Ru particle with a well-formed lattice and surface facets is seen on an amorphous support consisting of BN. A Ba-O promoter phase is observed on top of the Ru particle. Taken from Hansen et al. (2001) with permission from The American Association for the Advancement of Science. 

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