Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Photocatalytic hydrogen production"”.
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TiO2-supported copper nanoparticles prepared via ion exchange for photocatalytic hydrogen production
… particles were assessed as photocatalysts for hydrogen generation from an aqueous solution (10 vol. %) of methanol. Photocatalytic activity displayed by the IE Cu/TiO2 was compared with Cu/TiO2 prepared by wet impregnation (WI) and reasons for the differences in performance were investigated. …
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Two-electron mixed-valence complexes small molecule activation and photocatalytic hydrogen production
… Oxidative addition is also rapid: chlorine and hydrogen chloride react to afford Ir2I-III(tfepma)3C14 and Ir2I,III(tfepma)3HC13, respectively. Hydrogen adds reversibly to Ir20,II(tfepma)3C12, providing the first example of such an addition across a preserved metal-metal single bond.
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Improving Photocatalytic Hydrogen Production of Ru,Rh,Ru Supramolecular Complexes in Aerobic Aqueous Solutions
The production of hydrogen fuel via solar water splitting is an important carbon-neutral strategy for the development of renewable resources and has sparked great interest in the scientific community. Hydrogen production efficiencies for supramolecular photocatalysts of the architecture …
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Late transition metal bimetallics for photocatalytic hydrogen production, M-X and C-H bond activation
… on the mechanistic elucidation of the reported photocatalytic production of hydrogen from homogeneous hydrohalic acid solution using a two-electron mixed valence dirhodium complex. Studies aimed at understanding and improving the photochemical quantum efficiency for challenging M-X (X = CI, Br-) …
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Experimental investigation of photocatalytic hydrogen production with boron-doped TiO2 and multi-walled carbon nanotubes-TiO2
This thesis investigates photocatalytic hydrogen production by performing an experimental study using a small-scale photochemical cell which splits water to hydrogen and oxygen by UV light irradiated boron-doped TiO2 and carbon nanotube-TiO2 semiconductor photoelectrodes. The average current …
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Exploring Simple Catalyst for Transfer Hydrogenation of Ketones and Photocatalytic Hydrogen Production Using Homogeneous Metal Complexes
Transfer hydrogenation has been recognized to be an important synthetic method in both academic and industrial research to obtain valuable products including alcohols. Transition metal catalysts based on precious metals, such as Ru, Rh and Ir, are typically employed for this process. This thesis …
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Toward the photo-induced reductive elimination of halogens
… fuels. The target fuel of these schemes is hydrogen. For photocatalytic hydrogen production to be feasible, it must be performed on energy-poor substrates and must possess high quantum efficiency. The controlling aspect of this quantum efficiency is not hydrogen evolution, but rather …
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Design, analysis and experimental investigation of Cu-Cl based integrated systems
… the area of alternative energy carriers such as hydrogen, which can replace fossil fuels in the future. Hydrogen can be produced in a relatively environmentally friendly manner by using the copper-chlorine (Cu-Cl) thermochemical water splitting cycle (TWSC) due to its minimal reliance on fossil …
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Experimental and theoretical investigations of a new integrated solar tower system for photocatalytic hydrogen and power production
Solar energy conversion via photocatalytic hydrogen production from water is an attractive route for the propagation of a hydrogen economy. Increasing the efficiency of such systems to meet the target of 10% is essential for industrial their adoption. A new hybridized system employing a …
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CdSe based nanowires for the photocatalytic production of hydrogen gas
Photocatalytic production of hydrogen was investigated towards achieving a decarbonized supply of hydrogen gas for clean energy conversion technologies such as the proton exchange membrane fuel cell (PEMFC). This study uses a template-directed electrodeposition technique to synthesize …
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Halogen-elimination photochemistry and oxygen-activation chemistry of late transition-metal complexes
… elimination, the key energy-storing step in photocatalytic hydrogen production from HX (X = Cl, Br), are described. In the latter sections of the thesis, the oxygen-activation and reduction chemistries of rhodium and iridium hydride complexes are highlighted. In Chapters 1 and 2, …
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Ru,Rh,Ru Supramolecular Photocatalysts within Nafion® Membranes: Ion-exchange, Photoelectrolysis and Electron Transfer Processes
… [{(bpy)2Ru(dpp)}2RhBr2] 5+ complexes behave as photocatalytic hydrogen production catalysts in the Nafion® membrane. Furthermore, a second bulk photoelectrolysis experiment with the Nafion®/[{(bpy)2Ru(dpp)}2RhBr2] 5+/FTO electrodes shows an enhancement of catalytic activity compared to the first …