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Showing 1 to 20 of 32 for “"artificial photosynthesis"”.
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Towards Artificial Photosynthesis: Yeast-Inorganic Hybrid System
Artificially photosynthetic systems aim to store solar energy and chemically reduce carbon dioxide. These systems have been developed to use light to drive processes for carbon fixation into biomass and/or liquid fuels. We have developed a hybridbiological system that manages both genetically …
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First principles calculations of transition metal complexes for artificial photosynthesis
… context for their robustness and scalability. In artificial photosynthetic devices, light harvesting molecules drive reactions which create fuel (e.g by splitting water). For optimal fuel generation efficiency a long charge transfer excited state lifetime is necessary. Additionally, an absorption …
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Mixed ion and electron conducting polymer composite membranes for artificial photosynthesis
Inspired by the fact that OH- has a very high mobility in water, highly conductive OH⁻conducting membranes were developed for alkaline water electrolysis. The membranes were semi-interpenetrating networks of crosslinked poly(vinyl alcohol) (PVA) and a polycation miscible with PVA. It is analogous …
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Amine promotion of hydrogen evolution reaction suppression and CO2 conversion for artificial photosynthesis
Recycling CO2 back into fuels or other useful products is critically important to the global efforts to reduce greenhouse gases and global warming [1-3]. The electrochemical method is regarded as a promising means to do this because it has the advantage that water can be used as the proton source …
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Integrating photosystem II and electroactive bacteria with three-dimensional electrodes for semi-artificial photosynthesis
Artificial photosynthesis is at the forefront of strategies to tackle the global reliance on fossil fuels and shape the contour of a sustainable future fuelled by renewable resources. In this way, solar energy is harvested and stored into chemical bonds to render it viable for transport and …
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Spectroscopic Characterization of the Water-Oxidation Intermediates in the Ru-Based Catalysts for Artificial Photosynthesis
… out. These catalysts may be considered as artificial analogs of the oxygen-evolving complex (OEC) in the Photosystem II in green plants as they all undergo oxidative activation by proton coupled electron transfer (PCET) to reach higher oxidation states where water oxidation occurs. …
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Low temperature electrocatalytic reduction of carbon dioxide utilizing room temperature ionic liquids
Artificial photosynthesis, where one uses electricity from solar, or wind, to convert water and carbon dioxide into a hydrocarbon fuel could provide a viable route to renewable fuels but so far the results have been stymied because of the lack of a CO2 conversion catalyst that operates at low …
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Low temperature electrocatalytic reduction of carbon dioxide utilizing room temperature ionic liquids
Artificial photosynthesis, where one uses electricity from the sun, or wind, to convert water and carbon dioxide into a hydrocarbon fuel could provide a viable route to renewable fuels but so far the results have been stymied because of the lack of a CO2 conversion catalyst that operates at low …
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Photoelectrochemical tandem cells with enzymes wired to hierarchically-structured electrodes for solar fuel synthesis
In photosynthesis, solar energy drives the conversion of CO2 and H2O into chemical energy carriers and building blocks, releasing O2 as a by-product. Artificial photosynthesis attempts to mimic this process to produce a renewable and storable fuel, such as H2. Semi-artificial photosynthesis …
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Ionic self-assembly of porphyrin micro-nano structures for solar hydrogen evolution
… porphyrin molecules have been widely studied in artificial photosynthesis, the porphyrin monomers absorb light in a limited range of the solar spectrum and are unstable in solution. In using ionic selfassembly of two oppositely charged porphyrin molecules, we successfully synthesized the more …
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Intrinsic and Extrinsic Catalysis in Zirconium-based Metal-Organic Frameworks
… discussed. Finally, water oxidation as part of artificial photosynthesis through incorporated molecular catalysts will be introduced. Chapter 2 presents a modulator screening study on a zirconium-based MOF, UiO-66. One of the most commonly studied MOFs, UiO-66 provides an excellent platform for …
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Porphyrin-DNA as scaffold for nanoarchitecture and nanotechnology
… e.g. in making optical electronic devices, in artificial photosynthesis or in sensors. In contrast, DNA has only recently been found to be a good scaffold for the construction of functional molecules. Combining the chemical properties of porphyrins and DNA could open the door to the production …
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Zirconium-Based Metal-Organic Frameworks for Artificial Electrochemical Photosynthesis
… conductive materials for the key reactions in artificial photosynthesis is explored to highlight methods to improve the efficiency of these materials for electrocatalysis. The Morris group has previously shown that charge transfer in MOFs can occur through a redox hopping mechanism in which the …
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Investigation of chiral porphyrin aggregates with heterodyne-detected vibrational sum frequency generation spectroscopy
… technologies like dye-sensitized solar cells and artificial photosynthesis. Photosynthetic pigments, such as chlorophyll and bacteriochlorophyll, are of particular interest since their absorptive role is the first step in the solar harvesting process. Porphyrins, a group of macrocyclic organic …
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Electronic Effects in Multidentate Pyridinol and N-Heterocyclic Carbene Based Ligands for Transition Metal Catalyzed Carbon Dioxide Reduction
… This catalytic system will constitute an artificial photosynthesis scheme by producing fuels and other useful chemicals from carbon dioxide, mimicking how plants store solar energy in glucose.
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Carbon nitride for solar H2 production coupled to organic chemical transformations
Artificial photosynthesis utilises solar-light for clean fuel H2 production and is emerging as a potential solution for renewable energy generation. Photocatalytic systems that combine a light harvester and catalysts in one-pot reactor are promising strategies towards this direction. Yet, most of …
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DERIVATIZATION OF DIIMINE TRICARBONYL Re(I) COMPLEXES FOR COOPERATIVE CATALYSIS AND SURFACE IMMOBILIZATION
… in global climate. Nature utilizes CO2 through photosynthesis in which the plants harness energy from the sun to extract electrons from water to convert CO2 into sugars to fuel cellular activities. Using this as inspiration, our research aims to photochemically convert CO2 to higher value …
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Förster resonance energy transfer (FRET)-based nanophotonics using DNA origami structures
… wires and logic gates for molecular computing to artificial light harvesting systems for artificial photosynthesis. In the present cumulative doctoral thesis, different FRET systems on DNA origami structures have been designed and thoroughly analyzed. Firstly, the formation of guanine (G) …
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Proton-coupled electron transfer reactions in bio-inspired catalysis
… in many energy conversion processes, such as artificial photosynthesis, and in the development of alternative renewable energy technologies. Often proton-coupled electron transfer (PCET) is central to the interconversion of energy. Consequently, understanding the role of PCET in the mechanisms …
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Tailored diketopyrrolopyrrole-based organic dyes in photoelectrochemical cells for solar fuel synthesis
… This work expands the use of organic dyes for artificial photosynthesis with the aim of replacing ruthenium-based chromophores, and in closing, future directions for the continued development of precious metal-free dye-sensitised systems for solar fuel production are discussed.
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