Alba-Rubio, Ana C.; O'Neill, Brandon J.; Shi, Fengyuan; Akatay, Cem; Canlas, Christian; Li, Tao; Winans, Randall; Elam, Jeffrey W.; Stach, Eric A.; Voyles, Paul M.; Dumesic, James A.
description
We present a model system, based on spherical nonporous supports, to facilitate the characterization of supported metal catalysts stabilized by atomic layer deposition (ALD) against sintering and leaching under liquid-phase conditions. Calcination at high temperatures (973 K) produces pores in the ALD overcoat, and we image these pores using scanning transmission electron microscopy and electron energy loss spectroscopy (STEM/EELS). We determine the size of these pores to be ∼1 nm using small-angle X-ray scattering (SAXS). Finally, we demonstrate the use of ALD to synthesize novel bifunctional catalysts by the addition of an acidic oxide layer to the stabilizing overcoat.
