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Showing 1 to 20 of 67 for “"oxygen evolution reaction"”.
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Development of complex metal oxide electrocatalysts for oxygen evolution reaction
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
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Mesoporous oxides as efficient catalysts for the electrocatalytic oxygen evolution reaction (OER)
… electrolysers is limited by the slow kinetics of oxygen evolution reaction (OER). An increase in mass based OER activity is mandatory for a lower capital cost of electrolyser cells. In this thesis, synthesis routes are presented for new mesoporous metal oxide films used as catalytic layers for OER …
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Development of novel electrodes for oxygen evolution reaction towards green hydrogen production
L'abstract è presente nell'allegato / the abstract is in the attachment
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Development of new pyrochlore-type electrocatalysts for oxygen evolution reaction in acid
… of acid-stable, active catalysts for the oxygen evolution reaction (OER). In addition to discovering new catalysts, a fundamental understanding of OER activity and stability origin is also critical. This dissertation focuses on: (1) identifying active and acid-stable OER catalysts in …
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Investigating direct alkaline seawater electrolysis and its impact on the oxygen evolution reaction
… is the competition at the anode between the oxygen evolution reaction (OER) and the corrosive chlorine oxidation reaction (ClOR). An evaluation of earth-abundant OER catalysts and their interactions with seawater using advanced electrochemical and materials characterisation techniques is …
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Atom-by-atom designs of metal oxide catalysts for the oxygen evolution reaction
… energy technologies is essential. The oxygen evolution reaction (OER) holds great promise, as it enables the production of green chemicals, hydrogen gas, and pure metals electrolytically from their oxides, with oxygen as the sole byproduct. However, OER suffers from slow reaction …
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Nanoscale heterojunctions of transition metal oxide and silicon for high-efficiency oxygen evolution reaction
… energy storage into hydrogen, however, is oxygen evolution reaction (OER) because of its high overpoential and the complexity of surface structures and reaction mechanisms. To overcome these obstacles, researchers have approached in two ways: (i) searching for the best materials with the …
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Study of TaC Supported Ir-Based Oxygen Evolution Reaction Electrocatalysts Synthesized by Surfactant-Mediated Method
… carbide (TaC) as a potential support for oxygen evolution reaction (OER) electrocatalysts were investigated. It was first ball milled for 7 and 14 days in order to decrease the particle size and increase the surface area. The larger the surface area of a support, the better the dispersion …
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Iridium oxide supported on antimony-doped tin oxide as an electrocatalyst for the oxygen evolution reaction
… water electrolysis is an electrochemical redox reaction, cathodic hydrogen evolution cannot occur without an efficient, and rapid anodic oxygen evolution reaction (OER). While both iridium and ruthenium oxides are state-of-the-art OER catalysts in acidic environment, the latter undergoes …
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Designing novel multinary transition metal selenides as high-efficiency oxygen evolution reaction electrocatalysts and investigating surface properties
… electrocatalysts to expedite the anodic oxygen evolution reaction (OER) is a crucial task that needs to be addressed to boost the practical application of water splitting. This research focuses on the identification of OER electrocatalysts by systematically designing non-stochiometric …
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Correlative ex-situ analysis and operando ellipsometric investigation during oxygen evolution reaction of mesoporous iridium oxide model catalysts
… VEEL spectra with activity measurements of the oxygen evolution reaction (OER) suggests that the intrinsic activity (surface charge normalized activity) of IrOx scales with interband transition energies between the Ir 5d t2g sub-level and the O 2p orbital. For SE studies under operando …
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Transition metal oxide layered materials as catalyst and precatalyst for green energy applications: Oxygen evolution reaction and Fischer-Tropsch synthesis
… we principally studied the energy intensive oxygen evolution reaction (OER) in water splitting, and Fischer-Tropsch synthesis (FTS) to generate synthetic fuels. Birnessite is a 2D layered manganese dioxide material with intercalated Lewis cations and water molecules. Birnessites have been …
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Interrogating electrocatalytic mechanisms and developing nano-porous catalysts for energy conversion reactions: I. Oxygen evolution reaction, and II. Carbon dioxide reduction reaction
… new nano-porous catalysts for energy conversion reactions including the oxygen evolution reaction (OER) and carbon dioxide reduction reaction (CRR). First, I examined the oxygen evolution reaction in basic electrolytes using in situ electrochemical surface stress measurements. Second, I developed …
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Electrodeposition and characterization of metals and metal oxides for energy conversion and storage
… and compares their catalytic activity for the oxygen evolution reaction. Co<sub>3</sub>O<sub>4</sub> appears to be a more active catalyst than CoOOH based on Tafel analysis. However, when the observed current densities are corrected for the measured electrochemically active surface area, the …
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The influence of inert anode material and electrolyte composition on the electrochemical production of oxygen from molten oxides
… a novel process by which molten iron and gaseous oxygen are the products; no carbon dioxide is produced at the site of the electrolysis cell. The research presented in this thesis focuses on the anodic reaction and the preliminary development of an inert anode, as well as investigations into the …
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Proton-coupled electron transfer in molecular and material catalysis
… a variety of electrochemical and photo-excited reactions occurring in molecular, material, and biological systems. In this thesis, the role of PCET in hydrogen evolution molecular electrocatalysts, and iron-doped nickel-oxyhydroxide thin films used for oxygen evolution reaction, are explored by …
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NICKEL HYDROXIDE NANORIBBONS FOR EFFICIENT WATER SPLITTING AND DIRECT METHANOL FUEL CELL
Oxygen evolution reaction (OER) and methanol oxidation reaction (MOR) are very important reactions in hydrogen harvesting system and direct methanol fuel cell (DMFC). However, these two reactions are sluggish processes, due to the multi-proton coupled reactions. In this work, we report the first …
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Surface structural changes of perovskite oxides during oxygen evolution in alkaline electrolyte
… are among the most active catalysts for the oxygen evolution reaction (OER) in alkaline solution reported to date. In this work it is shown via high resolution transmission electron microscopy (HRTEM) and Raman spectroscopy that oxides such as BSCF82 rapidly undergoes amorphization at its …
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Bimetallic Electrocatalysts on TiO2 -Based Supports for Methanol Oxidation and Oxygen Evolution
… electrocatalysts. For the methanol oxidation and oxygen evolution reaction, a bimetallic structure can be used to enhance kinetics and increase stability. It is desired to support electrocatalysts to disperse nanoparticles on the surface and promote better catalyst utilization. Traditionally, …
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En route towards advanced catalyst materials for the electrocatalytic water splitting reaction
… for the electrocatalytic water splitting reaction. In order to breathe life into this technology, cost-efficient, stable and efficient catalysts are imploringly desired. In this manner, the preparation of Mn-, N-, S-, P-, and C-containing nickel materials has been investigated together …
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