Robust palladium catalysts on nickel foam for highly efficient hydrogenations

Abstract

The combination of a polydopamine interface, solvothermal seeding of Pd(OAc)2, and ALD Al2O3 overcoat enables the formation of evenly-coated, ultralow Pd loading Ni foam monolith materials.

Ultrathin Atomic Layer Deposited Al2O3 Overcoat Stabilizes Al2O3-Pt/Ni-Foam Hydrogenation Catalysts

“…To build a time profile, individual experiments were conducted at 2, 4, 8, 12, 14, 16, 18, and 24 h time points utilizing different pieces of Al 2 O 3 -Pt/Ni of similar weight (62.52 ± 1.44 mg; approximately 12 mm × 12 mm × 1.6 mm). Utilizing a previously reported mild hydrogenation protocol, 15 reactions were conducted at 3 bar of H 2 with 5 mL of EtOH at 50 °C and 1 mmol styrene. Full conversion to ethylbenzene was achieved at the 16−18 h time points (Figures 8b and S14).…”

“…One of our groups has recently demonstrated a hierarchical Pd on nickel foam hydrogenation catalyst system that requires very low Pd loadings and is readily recoverable and reusable. 15 Herein, this general strategy is exploited for the development of Ni foam-supported Pt catalysts. Ni foam monolith supports offer a number of advantages over more conventional systems such as carbonaceous or metal oxide powders, for example, ease of handling and separability afforded by the contiguous framework, 16 a porous three-dimensional (3-D) membrane framework (Figures 1 and 2a) amenable to application in continuous flow catalysis, 15,17 the potential for resistive heating, 18 and ferromagnetism which enables self-stirring, eliminating trace impurities on stir bars as a contamination vector.…”

“…One of our groups has recently demonstrated a hierarchical Pd on nickel foam hydrogenation catalyst system that requires very low Pd loadings and is readily recoverable and reusable . Herein, this general strategy is exploited for the development of Ni foam-supported Pt catalysts.…”

“…Herein, this general strategy is exploited for the development of Ni foam-supported Pt catalysts. Ni foam monolith supports offer a number of advantages over more conventional systems such as carbonaceous or metal oxide powders, for example, ease of handling and separability afforded by the contiguous framework, a porous three-dimensional (3-D) membrane framework (Figures and a) amenable to application in continuous flow catalysis, , the potential for resistive heating, and ferromagnetism which enables self-stirring, eliminating trace impurities on stir bars as a contamination vector . Ni foam-supported Pt catalysts have previously been reported for electrocatalysis applications. − To the best of our knowledge, these types of catalyst systems have not been utilized or optimized for thermocatalytic hydrogenation reactions, a critical subset of reactions with broad applications in both petrochemical and fine chemical industries …”

Pt-Coated Silicon Nanoparticles: An Investigation into the Hydrosilylation on Hydrogen-Terminated Silicon Surfaces Using Pt(dvs)

“…Hydrogenation reactions were performed in a 25 mL glass-insert reactor (Buchiglasuster "Tinyclave") according to a method reported by Rahmani and co-workers. 26 Typically, the reactor was charged with 1 mmol phenylacetylene, 100 mg of catalyst, and 5 mL of methanol as a solvent. The reactor was then filled with 6 bar of ultra-high-purity H 2 .…”