High-resolution SEM imaging of model catalytic materials

Studies of metal/support interactions in catalytic materials have been facilitated by use of model catalysts consisting of metals deposited on substrates of simple geometry suitable for direct imaging in the transmission electron microscope. An example of such a catalyst/substrate system is a model combustion catalyst comprised of nanometer-sized particles of Pd deposited on amorphous silica microspheres. These materials have recently been characterized high resolution TEM imaging, electron holography techniques, and ultra-high resolution scanning electron microscope (SEM). The high resolution SEM imaging results from the specimens are presented.