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5 results for “Redox Kinetics”
Kinetics of the redox reactions in STEAP1 and STEAP2
<p>The data repository includes the kinetic data of the redox reactions in STEAP1 and STEAP2, which are presented in "Mechanism of stepwise electron transfer in six-transmembrane epithelial antigen of the prostate (STEAP) 1 and 2" by Kehan Chen, Lie Wang, Jiemin Shen, Ah-lim Tsai, Ming Zhou and Gang Wu. The data include: 1) the reduction of ferric STEAP1 by reduced FADH2 and ferrous STEAP2; 2) the reduction of ferric STEAP1 by cytochrome b5 reductase; 3) the reduction of ferric STEAP2 with NADPH; and 4) the oxidation of ferrous STEAP1 and STEAP2 by ferric.NTA.</p>
Dataset of the article 'Redox state kinetics in water-oxidation IrOx electrocatalysts measured by operando spectroelectrochemistry'
<p>Data published in the article 'Redox state kinetics in water-oxidation IrO<sub>x</sub> electrocatalysts measured by <em>operando</em> spectroelectrochemistry', <a href="https://doi.org/10.1021/acscatal.1c03290">https://doi.org/10.1021/acscatal.1c03290</a>.</p> <p>Abstract: hydrous iridium oxides (IrO<sub>x</sub>) are the best oxygen evolution electrocatalysts available for operation in acidic environments. In this study, we employ time-resolved <em>operando</em> spectroelectrochemistry to investigate the redox states kinetics of IrO<sub>x</sub> electrocatalyst films for both water and hydrogen peroxide oxidation. Three different redox species involving Ir<sup>3+</sup>, Ir<sup>3.x+</sup>, Ir<sup>4+</sup> and Ir<sup>4.y+</sup> are identified spectroscopically and their concentrations are quantified as a function of applied potential. The generation of Ir<sup>4.y+</sup> states is found to be the potential determining step for catalytic water oxidation, whilst H<sub>2</sub>O<sub>2</sub> oxidation is observed to be driven by the generation of Ir<sup>4+</sup>states. The reaction kinetics for water oxidation, determined from the optical signal decays at open circuit, accelerate from ~ 20 s to < 0.5 s with increasing applied potential above 1.3V <em>vs.</em> RHE (i.e. TOFs per active Ir state increasing from 0.05 to 2 s<sup>-1</sup>). In contrast, the reaction kinetics for H<sub>2</sub>O<sub>2</sub> are found to be almost independent of the applied potential (increasing from 0.1-0.3 s<sup>-1 </sup>over a wider potential window), indicative of a first order reaction mechanism. These spectroelectrochemical data quantify the increase of both the density of active Ir<sup>4.y+</sup> states and the TOFs of these states with applied positive potential, resulting in the observed sharp turn on of catalytic water oxidation current. We reconcile these data with the broader literature while providing a unique kinetic insight into IrO<sub>x</sub> electrocatalytic reaction mechanisms, indicating a first order reaction mechanism for H<sub>2</sub>O<sub>2</sub> oxidation driven by Ir<sup>4+</sup> states, and a higher order reaction mechanism involving the co-operative interaction of multiple Ir<sup>4.y+</sup> states for water oxidation.</p>
Kinetics of the redox reactions in STEAP1 and STEAP2
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Extended Data Tables: Experimental constraints on Fe and S redox equilibria and kinetics in basaltic melt inclusions
<p>This record contains the Extended Data for the manuscript entitled: Experimental constraints on Fe and S redox equilibria and kinetics in basaltic melt inclusions."</p>
Dataset of the article 'Charge accumulation kinetics in multi-redox molecular catalysts immobilised on TiO2'
<p>Data published in the article 'Charge accumulation kinetics in multi-redox molecular catalysts immobilised on TiO<sub>2</sub>', available at <a href="https://doi.org/10.1039/D0SC04344C">https://doi.org/10.1039/D0SC04344C</a>.</p> <p>Abstract: Multi-redox catalysis requires the accumulation of more than one charge carrier and is crucial for solar energy conversion into fuels and valuable chemicals. In photo(electro)chemical systems, however, the necessary accumulation of multiple, long-lived charges is challenged by recombination with their counterparts. Herein, we investigate charge accumulation in two model multi-redox molecular catalysts for proton and CO<sub>2</sub> reduction attached onto mesoporous TiO<sub>2</sub> electrodes. Transient absorption spectroscopy and spectroelectrochemical techniques have been employed to study the kinetics of photoinduced electron transfer from the TiO<sub>2</sub> to the molecular catalysts in acetonitrile, with triethanolamine as the hole scavenger. At high light intensities, we detect charge accumulation in the millisecond timescale in the form of multi-reduced species. The redox potentials of the catalysts and the capacity of TiO<sub>2</sub> to accumulate electrons play an essential role in the charge accumulation process at the molecular catalyst. Recombination of reduced species with valence band holes in TiO<sub>2</sub> is observed to be faster than microseconds, while electron transfer from multi-reduced species to the conduction band or the electrolyte occurs in the millisecond timescale. Finally, under light irradiation, we show how charge accumulation on the catalyst is regulated as a function of the applied bias and the excitation light intensity.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.