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Showing 1 to 10 of 10 for “"Rhodium catalysts"”.
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A computational study of supported rhodium catalysts
… obtain microscopic structures of heterogeneous catalysts based on rhodium supported on a metal oxide (-Al2O3). Two different methodologies were used. The first methodology uses a periodic model and a plane-wave basis set to solve the Schrödinger equation in the framework of Bloch’s theorem. The …
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Effect of ceria and zirconia on nanoparticulate rhodium catalysts
… to react with any support materials. These catalysts are often loaded with small amount of promoter elements such as Ce and Zr that enhance their overall catalytic performances and catalyst lifetime. It is therefore desirable to develop new CeOx-based catalyst with both high redox activity …
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The stress and strain behavior of materials for energy storage and production
… stress changes of platinum, palladium, and rhodium catalysts for the oxygen reduction reaction of fuel cells. In the first section, silicon microstructuring is utilized in order to design structures that can withstand the large volumetric strains associated with forming lithium rich alloys …
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Encapsulation of cobalt complexes in zeolite Y for use as hydroformylation catalysts
… catalysed using carbonyl complexes of cobalt and rhodium (1-3,45). The main disadvantage of homogeneous catalysts is that, especially for the longer chain hydrocarbon systems, very energy-intensive methods (such as distillation) are required to remove them from the reaction products. These …
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The Development of Sequential Silylcarbocyclization Silicon-Based Cross -Coupling Reactions and Their Application in the Total Synthesis of Isodomoic Acid H
A sequential rhodium-catalyzed silylcarbocyclization of enynes parlayed with a palladium-catalyzed, silicon-based cross-coupling reaction has been developed. 1,6-Enynes reacted with benzyldimethylsilane in the presence of rhodium catalysts to afford five-membered rings bearing a …
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The Development of Sequential Silylcarbocyclization Silicon-Based Cross-Coupling Reactions and Their Application in the Total Synthesis of Isodomoic Acid H
A sequential rhodium-catalyzed silylcarbocyclization of enynes parlayed with a palladium-catalyzed, silicon-based cross-coupling reaction has been developed. 1,6-Enynes reacted with benzyldimethylsilane in the presence of rhodium catalysts to afford five-membered rings bearing a …
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Catalyst and substrate effects in enantioselective C–H insertion reactions of α-diazosulfones
… using copper and, to a lesser extent, rhodium catalysts. The key reaction pathways explored were C–H insertion and cyclopropanation, with hydride transfer competing in certain instances. Significantly, up to 98% ee has been achieved in the C–H insertion processes using …
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Liquid phase hydroformylation by zeolite supported rhodium
… compare the behavior of zeolites containing rhodium with that of homogeneous rhodium species as catalysts for liquid phase hydroformylation of 1-hexene in order to study the effects of zeolite immobilization. NaX zeolite was cation exchanged with several rhodium salts and used as …
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Rhodium boron nitride : a recyclable catalyst for the synthesis of a-aminophosphonates and dihydropyrimidinones
Submitted in fulfillment of the requirements for the award of the Degree of Master of Applied Science in Chemistry, Durban University of Technology, Durban, South Africa, 2016.
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Catalytic Transformation of Greenhouse Gases in a Membrane Reactor
Supported Ni and Rh catalysts were developed for the reforming of two greenhouse gases, methane and carbon dioxide to syngas (a mixture of hydrogen and carbon monoxide). This is an endothermic, equilibrium limited reaction. To overcome the thermodynamic limitations, a commercially available porous …