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Showing 1 to 20 of 59 for “"Water Electrolysis"”.
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Advanced photoanodes for photoassisted water electrolysis
… and storage of solar energy is imperative. Photoelectrolysis harnesses solar energy to evolve hydrogen and oxygen from water, thereby enabling energy storage via chemical means. Hematite or [alpha]-Fe₂O₃ has emerged as a highly promising photoanode candidate for photoelectrochemical cells. While …
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Earth Abundant Catalysts for Water Electrolysis at Low Overpotentials
Water electrolysis via renewable electricity (e.g., wind, solar) provides a carbon neutral route for pure hydrogen production to fuel zero emission power generation devices, such as fuel cells. Deployment of fuel cell vehicles is growing in the US and around the world, coupled with the construction …
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High-Performance Low-Cost Catalysts for Water Electrolysis: A Computational and Experimental Study
… transition metal oxide (TMO) catalysts for water electrolysis is a requirement to enable H2 production on a large scale. However, the water electrolysis process is hindered by the oxygen evolution reaction (OER), which has slow kinetics and a high overpotential, and this issue remains …
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Development of novel catalysts coated non-fluorinated proton exchange membranes for water electrolysis
… towards sustainable conversion methods, such as water electrolysis, which can produce hydrogen using renewable energy sources. Among the various electrolysis methods, proton exchange membrane water electrolysis (PEMWE) is particularly nota-ble for its high current density, efficient …
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Melt Processable Poly(acrylonitrile)-based Precursors for Carbon Fiber Production and Advanced Polymeric Membranes for Gas Separation and Water Electrolysis Applications
… acrylonitrile content were mixed with various water containing binary melting point modifiers to produce systems that formed stable melts at temperatures below the temperature corresponding to the onset of PAN-MA crosslinking. The structure of the copolymer was found to be 96.5 ± 0.13 mole % …
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LASER-based synthesis of nanostructures for water electrolysis and sensing materials [Sintesi mediante ablazione in liquido da LASER pulsato di nanostrutture per elettrolisi di acqua e sensoristica]
Tra le tecniche di sintesi utilizzate per produrre materiali nanostrutturati, l’ ablazione laser in liquido (PLAL) è una tecnica promettente e con grandi potenzialità, non sempre pienamente espresse. Questa tecnica si basa sull’interazione tra un LASER e un target solido immerso in un liquido: …
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Synthesis, characterisation, and properties of powder metallurgy transition metal-based high entropy alloys for electrocatalytic application
Water electrolysis is an eco-friendly route for hydrogen production when compared to other routes such as steam reforming, coal gasification, biomass gasification etc, however only 4% of hydrogen is being produced through water electrolysis. Water electrolysis proceeds via two half-cell reactions …
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Synthesis and Electrocatalytic Properties of Structure Engineered First-Row Transition Metal Derivatives
… is a green energy carrier, producing only water when combusted, and a hydrogen economy has been considered the ideal green economy for human society. Water electrolysis can produce high-purity hydrogen on a large scale, and if the electricity used in water electrolysis is obtained from …
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A prospective comparative lifecycle assessment for green and grey hydrogen production and utilisation in the South African context
… investigated for hydrogen production are water electrolysis powered by wind, solar PV or concentrated solar power, steam methane reforming, and water electrolysis powered by a 2040 grid electricity mix. Furthermore, the impacts of three available electrolysis technologies; viz. polymer …
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Novel conducive alkaline polymer membranes for fuel cells
… oxide) (PPO) have been investigated for water electrolysis applications. The prepared membranes were characterised using electrochemical impedance spectroscopy, infrared spectroscopy and thermal gravimetric analysis.Initial membranes showed very low ionic conductivity and poor stabilities …
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Iridium oxide supported on antimony-doped tin oxide as an electrocatalyst for the oxygen evolution reaction
… energy economy. Proton exchange membrane water electrolysis (PEMWE) offers a promising route for the generation of clean hydrogen, using renewable energy, for both stationary and mobile energy storage applications, and as a feedstock for the chemical industry. As water electrolysis is an …
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Electrochemical water technologies for resource recovery using polymer electrolytes
Electrification of water technologies is needed to overcome the challenges of our current linear water economy amid climate change, aging infrastructure, and intensified water demand. Technologies such as electrochemical nutrient recovery and water electrolysis are promising methods to obtain …
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Virus-enabled design of high-performing, three-dimensional nanomaterials for electrochemical energy applications
… several relevant energy applications spanning water electrolysis, microbatteries, and electrolytic urea decomposition. The virus-mediated synthesis toolkit yielded clear enhancements in electrochemical performance, as well as design insights into improving nanostructured electrodes in diverse …
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Iridium oxide supported on graphitized carbon for use as reversal tolerant anodes in pem fuel cells
… cell voltage reversal, carbon oxidation and water electrolysis occur at the anode to maintain the supply of protons and electrons to the cathode. These reactions are nonspontaneous and consume energy from the membrane electrode assembly (MEA), causing irreversible damage through carbon …
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Mixed ion and electron conducting polymer composite membranes for artificial photosynthesis
… 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 to …
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Experimental investigation of new coating methods for 3D-printed cathodes for hydrogen production
… evolution reaction. A new approach where the electrolysis cathodes are 3D-printed and coated for alkaline water electrolysis. Copper, iron, and molybdenum are considered with nickel as coatings using electrodeposition. The results are obtained from electrochemical measurements and hydrogen …
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Development of Proton Exchange Membrane for Fuel Cell and Electrolyzer
… proton exchange membrane fuel cells (PEMFCs) and water electrolysis systems. Two novel membrane design strategies were investigated: (i) modification of porous PTFE substrates with dopamine and sulfonated dopamine to fabricate reinforced PTFE/Nafion composite membranes, and (ii) surface …
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The production and characterization of ceramic carbon electrode materials for CuCl-HCl electrolysis.
… CuCl as well as O2 gas and HCl from CuCl2 and water. The CuCl is oxidized in HCl to produce H2 gas and regenerate CuCl2, this process occurs at potentials well below those required for water electrolysis. The electrolysis process occurs in a traditional PEM fuel-cell. In the aqueous anolyte …
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