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69 results for “Electrolysis”
Dataset of "Cobalt and nickel doped WSe2 as efficient electrocatalysts for water splitting and as cathodes in hydrogen evolution reaction PEM water electrolysis"
<p>Efficient electrocatalysts are crucial for water splitting and fuel cells. Using cheap alternatives that can improve reaction kinetics is essntial for advancing fuel cell technology. Although, tungsten diselinide (WSe2) is promising for electrocatalysis is not fully explored, especially in oxygen evolution and in applications such as polymer electrolyte membrane water electrolyzer.<br>In this work, we used a simple approach to dope WSe2 with cobalt and/or nickel atoms. The doped material was subsequently tested for hydrogen evolution reaction and oxygen evolution reaction. Accordingly, the two electrocatalysts are highly active and stable, affording low overpotentials comparable to those of noble metals. The effective introduction of heteroatoms causes the retention of coordination vacancies, furnishing active catalytic sites that enhanced electrocatalytic performance both in activity and charge transfer. Moreover, both doped materials show excellent performance and stability as cathode electrocatalysts in the polymer electrolyte membrane water electrolyzer with great promise for real-world applications.</p>
Dataset of "MoO3-xNiMoO4 nanorods synthetized using NiO nanoparticles for hydrogen evolution in anion exchange membrane water electrolysis"
<p>Novel method of Mo-Ni catalyst for hydrogen evolution reaction in anion exchange membrane water electrolysis was used. Complete physico-chemical and electrochemical characterization was done. Prepared material showed enhanced performance when compared to the similar Ni based materials. Physico-chemical characterization showed, that final material is formed by NiMoO4 nanorods coverd on the surface by the layer of the MoO3-x.</p>
Dataset of "Strain-Engineered Ir Shell Enhances Activity and Stability of Ir-Ru Catalysts for Water Electrolysis: An Operando Wide-Angle X-Ray Scattering Study"
<p>Ir-Ru alloys with high Ru content serve as stable and highly active catalysts for the oxygen evolution reaction (OER) in Proton Exchange Membrane Water Electrolyzers (PEM-WEs), enabling efficient operation with remarkably low Ir loadings (150 µg cm-²). Despite this, the mechanisms behind their enhanced stability remain unclear. In this study, we employ operando Wide-Angle X-ray Scattering (WAXS) and complementary ex-situ techniques to investigate the structural evolution of these magnetron-sputtered alloys within a PEM-WE cell. Our results reveal that, upon potential application, Ru is leached from the surface, leading to the formation of a bimetallic Ir-Ru@IrOx core-shell structure. The Ir shell, significantly strained by the underlying Ir-Ru core, exhibits substantially higher catalytic activity than pure Ir. Notably, the Ir-Ru 25:75 catalyst shows superior stability over Ir-Ru 50:50, despite its higher Ru content, due to a more robust Ir shell that protects subsurface Ir and Ru from oxidation and dissolution. This study not only clarifies the performance-enhancing mechanisms of Ir-Ru catalysts but also suggests that other, more economical materials such as Co, Os, or Ti could serve as effective cores in Ir-M systems, offering a pathway to more cost-effective catalysts for PEM-WE applications.</p>
Data to the journal article "The capping agent is the key: Structural alterations of Ag NPs during CO2 electrolysis probed in a zero-gap gas-flow configuration"
<p>This data set corresponds to the journal article "The capping agent is the key: Structural alterations of Ag NPs during CO2 electrolysis probed in a zero-gap gas-flow configuration"</p>
Raw data for the article "Size-Dependent Structural Alterations in Ag Nanoparticles During CO2 Electrolysis in a Gas-Fed Zero-Gap Electrolyzer"
<p>In the article "Size-Dependent Structural Alterations in Ag Nanoparticles During CO2 Electrolysis in a Gas-Fed Zero-Gap Electrolyzer" we described our investigation on the size-dependent degradation behavior of Ag NPs (10, 40, and 100 nm in size) on GDE during CO<sub>2</sub> electrolysis. Here we present the dataset the work was based on. For each figure in the article and the supporting information we provide a set of raw and unprocessed data.</p>
DATASET: Electric Potential Distribution Inside the Electrolyte During High Voltage Electrolysis
<p>This project contains all the data shown in the figures of the manuscript (and the supporting information) entitled:<br> 'Electric Potential Distribution Inside the Electrolyte During High Voltage Electrolysis'<br> (doi:10.26434/chemrxiv-2022-nw4sp).</p> <p>The data to each figure is provided in a subfolder with further information.</p>
Assessing the prospective environmental performance of hydrogen from high-temperature electrolysis coupled with concentrated solar power
<p>Hydrogen is currently being promoted because of its advantages as an energy vector, its potential to decarbonise the economy, and strategical implications in terms of energy security. Hydrogen from high-temperature electrolysis coupled with concentrated solar power (CSP) is especially interesting since it enhances the last two aspects and could benefit from significant technological progress in the coming years. However, there is a lack of studies assessing its future environmental performance. This work fills this gap by carrying out a prospective life cycle assessment based on the expected values of key performance parameters in 2030. The results show that parabolic trough CSP coupled with a solid oxide electrolyser is a promising solution under environmental aspects.<br> It leads to a prospective hydrogen carbon footprint (1.85 kg CO2 eq/kg H2) which could be classified as low-carbon according to current standards. The benchmarking study for the year 2030 shows that the assessed system significantly decreases the hydrogen carbon footprint compared to future hydrogen from steam methane reforming (81% reduction) and grid electrolysis (51%), even under a considerable penetration of renewable energy sources.</p>
Thin Nickel Coatings on Stainless Steel for Enhanced Oxygen Evolution and Reduced Iron Leaching in Alkaline Water Electrolysis
<p>This is a dataset detailing the characterization of electrodeposited Ni-layers on 1 cm2 pure Ni- and stainless steel-plates. The data is available as text files (.txt), MS Excel files (.xls), Origin files (.opju), and Gamry raw data files (.DTA).</p>
DATASET: Using auxiliary electrochemical working electrodes as probe during contact glow discharge electrolysis: A proof of concept study
<p>This project contains all the data shown in the figures of the manuscript (and the supporting information) entitled:<br> 'Using auxiliary electrochemical working electrodes as probe during contact glow discharge electrolysis: A proof of concept study'<br> (doi:10.26434/chemrxiv-2022-0v5sc).</p> <p>The data to each figure is provided in a subfolder where each curve is stored as a single CSV.<br> The filenames contain labels describing the curves.</p>
Dataset to accompany publication "Photodeposition-Based Synthesis of TiO2@IrOx Core-Shell Catalyst for Proton-Exchange Membrane Water Electrolysis with Low Iridium Loading"
<h2>Dataset description</h2> <p>This dataset provides the raw data for the manuscript "Photodeposition-Based Synthesis of TiO<sub>2</sub>@IrO<sub>x</sub> Core-Shell Catalyst for Proton-Exchange Membrane Water Electrolysis with Low Iridium Loading"<strong> </strong>published in <em>Advanced Science </em>on 14 June 2024 (DOI: <a href="https://doi.org/10.1002/advs.202402991">https://doi.org/10.1002/advs.202402991</a>).</p> <p>The data consists of:</p> <ol> <li>XRD pattern of TiO<sub>2</sub>@IrO<sub>x</sub> (40 wt% Ir) as shown in Fig. 3e.</li> <li>XPS spectra of 3 samples: <strong>2.1</strong> TiO<sub>2</sub>@IrO<sub>x</sub> (40 wt% Ir) as shown in Fig. 3f.; <strong>2.2 </strong>TiO<sub>2</sub>@IrO<sub>x</sub> (only shell) as shown in Fig. 3g; <strong>2.3</strong> TiO<sub>2</sub>@IrO<sub>x</sub> (photodeposited seeds) as shown in Fig. S8.</li> <li>Datasets for NanoCT of the TiO<sub>2</sub>@IrO<sub>x</sub> catalyst layer as shown in Fig. 5 a-c : <strong>3.1</strong> HRES Tilt series; <strong>3.2 </strong>reconstructed slices.</li> </ol> <h2>Abstract</h2> <p>The widespread application of green hydrogen production technologies requires cost reduction of crucial elements. To achieve this, a viable pathway to reduce the iridium loading in proton exchange membrane water electrolysis (PEMWE) is explored. Herein, we present a scalable synthesis method based on a photodeposition process for a TiO<sub>2</sub>@IrO<sub>x</sub> core-shell catalyst with a reduced iridium content as low as 40 wt%. Using this synthesis route, we obtain titania support particles homogeneously coated with a thin iridium oxide shell of only 2.1 ± 0.4 nm. The catalyst exhibits not only high ex situ activity, but also decent stability compared to commercially available catalysts. Furthermore, the unique core-shell structure provides a threefold increased electrical powder conductivity compared to structures without the shell. In addition, the low iridium content facilitates the fabrication of sufficiently thick catalyst layers at decreased iridium loadings mitigating the impact of crack formation in the catalyst layer during PEMWE operation. We demonstrate that the novel TiO<sub>2</sub>@IrO<sub>x</sub> core-shell catalyst clearly outperforms the commercial reference in single-cell tests with an iridium loading below 0.3 mg<sub>Ir</sub> cm<sup>‑2 </sup>exhibiting a superior iridium-specific power density of 17.9 kW g<sub>Ir</sub><sup>-1 </sup>compared to 10.4 kW g<sub>Ir</sub><sup>-1 </sup>for the commercial reference.</p>
Dataset for the publication: Metallic Impurities in Electrolysis: Catalytic Effect of Pb Traces in Reductive Amination and Acetone Reduction
<p>This dataset contains the experimental data of the publication "Metallic Impurities in Electrolysis: Catalytic Effect of Pb Traces in Reductive Amination and Acetone Reduction" that is published in Angewandte Chemie International Edition. </p>
AC efficiency of GrInHy2.0 electrolysis plant (incl. compressor)
<p>AC efficiency [%] of the GrInHy2.0 electrolysis system incl. compressor unit (compression to ~10 bar), with respect to lower heating value of produced hydrogen: eta_{el,plant} = m\dot * H_i / (P_{el,HTE}+P_{el,Compr}), heat intake not included as energy input.</p> <p>Time: May 2021 - October 2022</p>
DATASET for Biomethanol production via electrolysis, oxy-fuel combustion, water-gas shift reaction, and LNG cold energy recovery
<p>DATASET for the paper entitled: Biomethanol production via electrolysis, oxy-fuel combustion, water-gas shift reaction, and LNG cold energy recovery</p>
La and Mn-doped cobalt spinel oxygen evolution catalyst for proton exchange membrane electrolysis
<p>Finding electrocatalysts using earth-abundant materials as a replacement to iridium for oxygen-evolution reaction (OER) in proton exchange membrane water electrolyzer (PEMWE) represents a critical step in reducing the cost for green hydrogen production. We report here a nanofibrous cobalt spinel catalyst co-doped with lanthanum and manganese prepared from zeolitic imidazolate framework embedded in electrospun polymer fiber. The catalyst demonstrated a low overpotential of 353 millivolts at 10 milliamperes per square centimeter and a low degradation for OER over 360 hours in acidic electrolyte. PEMWE containing this catalyst at anode demonstrated a current density of 2000 milliamperes per square centimeter at 2.47 volts (Nafion® 115 membrane) or 4000 milliamperes per square centimeter at 3.00 volt (Nafion® 212 membrane), and low degradation in accelerated-stress-test. High-resolution electronic microscopy and operando X-ray absorption spectroscopy, combined with computational modeling, revealed the different functions of lanthanum, manganese, and cobalt in enabling enhanced activity, conductivity and acidic tolerance within the OER operating window.</p>
La and Mn-doped cobalt spinel oxygen evolution catalyst for proton exchange membrane electrolysis
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Long-term performance of PEM water electrolysis cells with 3D printed electrodes and low catalyst loading
<p>Original data for the article with the same title</p>
Simulation results of the technology diffusion model for electrolysis capacity
<p>This upload contains the pre-run simulation output of the technology diffusion model for the article:</p> <p>Odenweller, A., Ueckerdt, F., Nemet, G. F., Jensterle, M., and Luderer, G.: "Probabilistic feasibility space of scaling up green hydrogen supply".</p> <p>You may use the files to run the model code (available on GitHub) in reproduction mode, which reproduces all figures of the article without having to run the time-consuming simulation yourself. All files are provided in the rds format.</p> <p>Contents of this upload:</p> <ul> <li>01_conventional_growth_parameters.rds - Parameters of the distributions in the conventional growth case</li> <li>02_conventional_growth_sample.rds - Sample of the distributions in the conventional growth case</li> <li>03_conventional_growth_results.rds - Simulation results of model in the conventional growth case</li> <li>04_unconventional_growth_parameters.rds - Parameters of the distributions in the unconventional growth case</li> <li>05_unconventional_growth_sample.rds - Sample of the distributions in the unconventional growth case</li> <li>06_unconventional_growth_results.rds - Simulation results of model in the unconventional growth case</li> </ul>
STEM and XRD files of Water and Hydroxide Trapping in Cobalt Tungstate for Proton Exchange Membrane Water Electrolysis
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Dataset for Publication: Industrially Relevant Conditions in Lab-Scale Analysis for Alkaline Water Electrolysis
<p>The provided data contains the calculations and plots of the manuscript 'Industrially Relevant Conditions in Lab-Scale Analysis for Alkaline Water Electrolysis'. All experimental procedures and an in-depths analysis can be found <a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/celc.202300432">there</a>. (DOI: <a href="https://doi.org/10.1002/celc.202300432">10.1002/celc.202300432 )</a>. The data is available in .opju files (origin plots), .xlsx files (excel sheets for calculations) and in the .csv format. </p>
Industrially relevant characterisation of a Ni mesh anode in alkaline water electrolysis
<p>A dataset on the characterisation of a 1 cm² Ni mesh anode in alkaline water electrolysis is provided herein. Setup wise, a three electrode beaker cell setup was used and industrially relevant conditions (<em>e.g.</em> 80°C & 30 wt.% KOH) were applied. Further details on the setup can be found in a previous <a href="https://doi.org/10.1002/celc.202300432">publication.</a></p>
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OpenNeuro
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