Platinum nano particles dispersed in alumina

Abstract

We report the propane dehydrogenation behavior of catalysts prepared using wet impregnation method that immobilize Pt nano cluster on the alumina surface. The immobilization of the metal particles and their nano size dimensions were demonstrated by transmission electron microscopy. Selectivity to propylene for these catalysts is comparable to those obtained over industrial Pt catalysts, yet the resistance to deactivation by carbon poisoning is much greater for our catalysts. The deactivation behavior is more typical of traditionally prepared PtSn catalysts on γ-alumina than of catalysts supported onθ-alumina.

Creation of gallium acid and platinum metal sites in bifunctional zeolite hydroisomerization and hydrocracking catalysts by atomic layer deposition

“…This size range of the Pt particles corresponds to the size of highly dispersed Pt catalysts supported on alumina used experimentally and industrially. [91][92][93][94][95][96][97] To understand the extent of dispersion of Pt nanoparticles towards the interior of the alumina spheres, an approximately 100 nm thick slice of an alumina sphere was obtained using a focused ion beam (FIB), and HAADF-STEM images of this crosssection were made. The images are shown in Figure 10.…”

Spherical core–shell alumina support particles for model platinum catalysts

“…This size range of the Pt particles corresponds to the size of highly dispersed Pt catalysts supported on alumina used experimentally and industrially. [91][92][93][94][95][96][97] To understand the extent of dispersion of Pt nanoparticles towards the interior of the alumina spheres, an approximately 100 nm thick slice of an alumina sphere was obtained using a focused ion beam (FIB), and HAADF-STEM images of this cross-section were obtained. The images are shown in Fig.…”