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Showing 1 to 20 of 58 for “"Hydrogen generation"”.
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Solar Driven Hydrogen Generation with Dye-Sensitised CuCrO2 Photocathodes
… cells provide a platform for H2 generation from water. Fuel-forming photocathodes are currently limited by the small range of wide-bandgap p-type semiconductors available. The majority of previous reports have employed NiO, which displays low performance with immobilised dyes and …
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Chemical simulation of hydrogen generation in a plasma fuel reformer
… The device is set up to produce syngas (hydrogen and carbon monoxide gas mixture) from partial oxidation of any hydrocarbon. We studied the behavior of methane as fuel and used the GRI methane combustion mechanism in our simulations. The goal was to characterize the reactor to be able to …
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Optimized Sustainable Hydrogen Generation from Liquid Metal Activated Aluminum-Water Reactions
… a sustainable and cost-effective method for hydrogen generation using aluminum waste, addressing both energy and environmental challenges. Activated aluminum reacts with water to produce hydrogen, heat, and aluminum oxyhydroxide (boehmite), a commercially valuable byproduct. As a safe, …
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Development of a PSA-based safety assessment and management framework for nuclear-based hydrogen generation system.
… cycle a promising method for future large-scale hydrogen generation. The nuclear-based hydrogen generation leads to new challenge for system safety due to the complexity of the co-generation system. In this research, a PSA-based framework for safety assessment and safety management of the …
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Optimizing energy conversion efficiency of a proton exchange membrane green hydrogen generation system while incorporating balance of plant modeling
Hydrogen has the potential to decarbonize several difficult to decarbonize sectors of the U.S. energy economy such as medium- and heavy-duty transportation, energy storage, and industrial processes such as steel making. Currently most of the hydrogen produced globally is produced with steam methane …
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Solar Driven Photoelectrochemical Water Splitting For Hydrogen Generation Using Multiple Bandgap Tandem Of Cigs2 Pv Cells And Thin Film Photocatalyst
… (PEC) water splitting to produce very pure hydrogen and oxygen. Efficiencies obtained using CIGS2 have been lower than those achieved using CuInSe2 and CuIn1-xGaxSe2. The basic limitation in the efficiencies is attributed to lower open circuit voltages with respect to the bandgap of the …
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Photochemical and time-resolved spectroscopic studies of dirhodium hydrogen-generating species
… to elucidate the mechanism of photocatalytic hydrogen generation from hydrohalic acid solutions ...
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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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Iron Modified Bismuth Titanate Pyrochlore Photocatalysts for Environmental Remediation and Solar Fuel Production
… (Fe_BTO), for the photocatalytic production of hydrogen. Detailed insights into the photocatalyst performance in a methanol-water mixture were obtained by examining the effects of catalyst loading, light intensity, methanol concentration, and catalyst stability under repeated use. Among the …
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Correlation of Photocatalytic Activity with Band Structure of Low-dimensional Semiconductor Nanostructures
Photocatalytic hydrogen generation by water splitting is a promising technique to produce clean and renewable solar fuel. The development of effective semiconductor photocatalysts to obtain efficient photocatalytic activity is the key objective. However, two critical reasons prevent wide …
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Sunlight Active (CoTiO3) – Titania (TiO2) Catalyst with Effective Activity for Dye Degradation and H+ Evolution
… same time the catalyst can produce 78 times more hydrogen than pure TiO2. The results show that there is a co-catalytic effect among the substrate (TiO2-rutile) and the CoTiO3. The chemical composition, phases and frameworks are investigated due to their critical effects on the high degree of …
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Nanostructured nitrogen and carbon codoped TiO2 thin films: synthesis, structural characterization and optoelectronic properties
… to be a very useful catalyst is the clean hydrogen generation using solar radiation. Energy consumption is increasing every year and, as a result, renewable and sustainable alternative energy sources are becoming increasingly important. Therefore, clean hydrogen generation research is …
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Zinc alloy powders for alkaline batteries
… into the alkaline solution and producing hydrogen gas as a byproduct. In the past, mercury was alloyed with zinc to slow down the corrosive process and prevent excessive hydrogen generation. Since mercury has been deemed as a health and environmental hazard, bismuth and indium are now used …
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Understanding the Corrosion of Low-Voltage Al-Ga Anodes
… operates at very negative voltages, leading to hydrogen generation at the steel cathode, which may cause hydrogen embrittlement. Aluminum can operate at less-negative voltages, therefore reducing hydrogen generation, but it forms a passive oxide film, preventing the anode from corroding. Ga is …
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Investigation and assessment of the integrated copper chlorine cycle for hydrogen production with a new separation process
The production of hydrogen as a clean fuel is anticipated to have a major impact on the development of the environmentally benign generation of energy. At present, a significant portion of hydrogen generation is based on the exploitation of fossil fuels thereby contributing to an increase in global …
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Robust Nickel Catalysts Supported By Biaryl-Bridged Pyridyl-N-Heterocyclic Carbenes For Carbon Dioxide Reduction To Value-Added Products
… selectively for CO2 reduction rather than hydrogen generation. Our strategy for CO2 reduction involves the design of new homogeneous catalysts with tunable geometries and polyaromatic frameworks with increased delocalization to lower overpotentials for catalysis. We report a family of …
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Life Cycle Assessment of Various Nuclear-Based Hydrogen and Ammonia Production Methods
… life cycle assessment (LCA) of nuclear-based hydrogen and ammonia production is performed. Environmental impacts of nuclear hydrogen and ammonia production processes are assessed in five different impact categories selected from CML-2001 method. In one scenario BWR-HTE nuclear hydrogen …
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Multi-state system in a fault tree analsis of a nuclear based thermochemical hydrogen plant
Nuclear-based hydrogen generation is a promising way to supply hydrogen for this large market in the future. This thesis focuses on one of the most promising methods, a thermochemical Cu-Cl cycle, which is currently under development by UOIT, Atomic Energy of Canada Limited (AECL) and the Argonne …
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SYNTHESIS OF Ti02- BASED PHOTOCATALYSTS FOR PHOTOCATALYTIC H2 GENERATION
… set-up by Honda and Fujishima, photocatalytic H2 generation using TiO2 has been extensively studied due to its relatively high efficiency and photostability compares with other semiconductors. The photocatalytic activity of pristine TiO2 can be substantially enhanced by structural engineering …
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A consumer guide to the benefits and obstacles of transitioning to the hydrogen fuel cell
Hydrogen Fuel Cells are a much talked about technology often represented as promising virtually unlimited amounts of non-polluting power by chemically reacting hydrogen, the most abundant element in the universe, with oxygen without combustion. Our analysis indicates that fuel cells are indeed a …
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