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20 results for “Catalyst synthesis”
ZnO-Promoted Inverse ZrO2–Cu Catalysts for CO2-Based Methanol Synthesis under Mild Conditions
<p>Datasets supporting the publication 'ZnO-Promoted Inverse ZrO<sub>2</sub>–Cu Catalysts for CO<sub>2</sub>-Based Methanol Synthesis under Mild Conditions': catalyst evaluation data (Excel), XRD (Origin), crystallite sizes, Cu surface area, CO<sub>2</sub> uptake, H<sub>2</sub>-TPR, CO<sub>2</sub>-TPD, CO-DRIFTS profiles (CSV)</p>
Synthesis of Phenol-Tagged Ruthenium Alkylidene Olefin Metathesis Catalysts for Robust Immobilisation Inside Met-al-Organic Framework Support
<p>Data confirming the structure of the new compounds obtained within the project, published in <em>Catalysts</em> <strong>2023</strong>, <em>13</em>(2), 297; <a href="https://doi.org/10.3390/catal13020297">https://doi.org/10.3390/catal13020297</a></p> <p>The research was supported by the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 860322 for the ITN-EJD “Coordination Chemistry Inspires Molecular Catalysis” (CCIMC) and by the National Science Centre, Poland (OPUS grant 2017/27/B/ST5/00941).</p>
Synthesis of [Mim][OTf]-TiO2 catalyst - NCN project OPUS, grant no. 2020/37/B/ST8/00693.
<p>Dataset contains results obtained during the NCN project OPUS, grant no. 2020/37/B/ST8/00693. The file presents the synthetic procedure of [Mim][OTf]-TiO2 catalyst.</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>
Droplet-Based Microfluidics Platform for the Synthesis of Single-Atom Heterogeneous Catalysts
<p>Data set supporting the publication of : "Droplet-Based Microfluidics Platform for the Synthesis of Single-Atom Heterogeneous Catalysts" (<a href="https://doi.org/10.1002/sstr.202200284">https://doi.org/10.1002/sstr.202200284</a>) by T. Moragues, S. Mitchell, D. Faust Akl, J. Pérez-Ramírez, and A. deMello.</p>
Self-Supported Polymeric Ruthenium Complexes as Olefin Metathesis Catalysts in Synthesis of Heterocyclic Compounds
<p>Data confirming the structure of the new compounds obtained within the project, published in <em>Catalysts</em> <strong>2022</strong>, <em>12</em>(10), 1087; <a href="https://doi.org/10.3390/catal12101087">https://doi.org/10.3390/catal12101087</a></p> <p>The research was performed within MAESTRO project and was funded by National Science Centre, Poland, grant number DEC-2019/34/A/ST4/00372.</p>
Aza-Claisen rearrangement as a key step in synthesis of specialised anilines used in the production of efficient ethenolysis catalysts
<p>Data confirming the structure of the new compounds obtained within the project, published in <br><i><strong>Catal. Sci. Technol.</strong></i>, 2023,<strong>13</strong>, 3682-3688, https://pubs.rsc.org/en/content/articlelanding/2023/cy/d3cy00395g</p><p>The research was supported by the National Science Centre, Poland (OPUS grant DEC-2017/27/B/ST5/02563).</p>
One-pot synthesis of iron-doped ceria catalysts for tandem carbon dioxide hydrogenation
<p>Raw data set for the manuscript "One-pot synthesis of iron-doped ceria catalysts for tandem carbon dioxide hydrogenation"</p> <p>Journal: Catal. Sci. technol.</p> <p>Authors: Albert Gili, Maged F. Bekheet, Franziska Thimm, Benjamin Bischoff, Michael Geske, Martin Konrad, Sebastian Praetz, Christopher Schlesiger, Sören Selve, Aleksander Gurlo, Frank Rosowski, Reinhard Schomäcker</p> <p>Abstract: We report on the one-pot synthesis of inexpensive and abundant CeO<sub>2</sub> and 1.5, 4.5, and 9 mol% Fe-doped ceria (Ce<sub>1-x</sub>Fe<sub>x</sub>O<sub>2-δ</sub>) systems and their catalytic activity for tandem CO<sub>2</sub> hydrogenation. XAFS and XRD demonstrate that oxygen vacancies are generated via two mechanisms: firstly, by the substitution of Ce<sup>4+</sup> by Fe<sup>3+ </sup>in the lattice and the subsequent loss of oxygen anions. Secondly, by the partial reduction of Ce<sup>+4</sup> to Ce<sup>+3</sup>, which is enhanced by the presence of Fe. All the samples tested show high activity for CO<sub>2</sub> hydrogenation and the production of CO, CH<sub>4</sub>, and light (C<sub>2</sub>-C<sub>4</sub>) alkanes and alkenes, with the 9 mol% Fe-doped CeO<sub>2</sub> showing the best performance in terms of CO<sub>2</sub> reaction rate and product selectivity. During reaction, Fe exsolves/seggregates from the ceria, resulting in particles decorating the surface of the catalyst and increasing the reaction rates of CO<sub>2</sub>. This system is composed of two functionalities, the oxygen vacancy and the Fe, whose close vicinity results in a high selectivity toward CO and CH<sub>4</sub> detrimental to the more valuable hydrocarbons. A rather complex interplay between the two functionalities, their interface, and the particle size of the catalysts exists for this tandem reaction network on this catalytic system and deserves further studies.</p>
Electrochemical on-surface synthesis of a strong electron-donating graphene nanoribbon catalyst
<p><span>On-surface synthesis of edge-functionalized graphene nanoribbons (GNRs) has attracted much attention. However, producing such GNRs on a large scale through on-surface synthesis</span><span> </span><span>under ultra-high vacuum on thermally activated metal surfaces has been challenging. This is mainly due to decomposition of functional groups at temperatures </span><span>of</span><span> 300 to 500°C and limited monolayer GNR growth based on the metal catalysis. To overcome these obstacles, we developed an on-surface electrochemical technique that utilizes redox reactions of asymmetric precursors at an electric double layer where a strong electric field is confined to the liquid-solid interface. <a name="_Hlk164526696"></a>We successfully demonstrate layer-by-layer growth of strong electron-</span><span><span>donating</span><span> GNRs on electrodes at temperatures </span><span><</span><span>80°C without decomposing functional groups.</span></span><span> </span><span>We show</span><span> that high-voltage facilitates previously unknown heterochiral di-cationic polymerization. <a name="_Hlk164368440"></a>Electro</span><span><span>chemically produced</span><span> GNRs exhibiting one of the strongest electron-</span><span>donating</span><span> properties known, enable extraordinary silicon-etching catalytic activit</span><span>y,</span><span> </span><span>exceeding those of </span><span>noble metals, with superior photoconductive properties.</span></span><span> </span><span>Our technique advances the possibility of producing various edge-functional GNRs.</span></p>
Supplementary Material for 1,2,4-Triazines and Calcium Carbide in the Catalyst-Free Synthesis of 2,3,6-Trisubstituted Pyridines and Their D-, 13C-, and Doubly D2-13C2-Labeled Analogues
<p><a href="https://onlinelibrary.wiley.com/doi/10.1002/asia.202300781">https://onlinelibrary.wiley.com/doi/10.1002/asia.202300781</a></p>
Defective Zirconia Promotes Monometallic Iron Catalysts for Higher Alcohol Synthesis
<p>Datasets supporting the publication 'Defective Zirconia Promotes Monometallic Iron Catalysts for Higher Alcohol Synthesis'</p>
Dataset: Active learning streamlines development of high performance catalysts for higher alcohol synthesis
<p>In this repository there are five Excel files, three Jupyter notebook files, and a zip archive containing Origin files. </p> <p>The Full_catalytic_performance_data.xlsx file comprises all the experimental and computational catalytic data complied as a part of the research work titled "Active learning streamlines development of high performance catalysts for higher alcohol synthesis" carried out at the Advanced Catalysis Engineering group, ETHZ. The Source_data.xlsx file and .opju files contain the raw data used to create the display items in the manuscript.</p> <p>The repository contains three additional files "Modelling_Data_Phase_1.xlsx", "Modelling_Data_Phase_2.xlsx", "Modelling_Data_Phase_3.xlsx" which contain the curated data to run the Gaussian process -Bayesian Optimization algrotihm across three specific active learning Phases devised in this study. The python codes necessary to run the model are provided as Jupyter Notebook (.ipynb) files and are also available on GitHub in the link provided below.</p>
Primary NMR data: A Facile Approach to the Synthesis of 3-Acylisoxazole Derivatives by the Use of Reusable Solid Acid Catalysts
<p>This dataset is primary NMR data in the paper: A Facile Approach to the Synthesis of 3-Acylisoxazole Derivatives by the Use of Reusable Solid Acid Catalysts.</p>
Design of Flame-Made ZnZrOx Catalysts for Sustainable Methanol Synthesis from CO2
<p>Data set for publication entitled Design of Flame-Made ZnZrOx Catalysts for Sustainable Methanol Synthesis from CO2</p>
Quinoline conjugated imidazopyridine and pyridopyrimidine synthesis in water as highly selective fluoride sensors via a catalyst-free four-component reaction
<p>Abstract</p> <p>A green and convenient procedure for the synthesis of quinoline-conjugated imidazopyridines and pyridopyrimidines has been developed by a simple one-pot reaction in the absence of any transition metal catalyst in water. This green process can be readily performed by reacting inexpensive starting materials of 2-chloroquinoline-3-carbaldehyde, malononitrile, 1,1-bis(methylthio)-2-nitroethylene, and diamine in aqueous solution. The present synthesis shows attractive characteristics, such as the use of water as reaction media, convenient one-pot operation, and reduced waste production without the use of any base or metal promoters. The products are purified by crystallization from ethanol, and the process does not involve any hazardous solvent. Also, the fluorescence study of these conjugated systems was also considered, which revealed that they have highly selective sensing of fluoride.</p>
The synthesis of SBA-Pr-3AP@Pd and its application as a highly dynamic, eco-friendly heterogeneous catalyst for Suzuki–Miyaura cross-coupling reaction
<p>The hexagonal mesoporous organic–inorganic hybrid as a new nanocatalyst was prepared by the treatment of SBA-15 with (3-chloropropyl)triethoxysilane, the 2,4,6-triamino pyrimidine ligand, and then PdCl2 to obtain the SBA-15-propyl-triamino pyrimidine@Pd called as SBA-Pr-3AP@Pd, which was examined through Suzuki–Miyaura cross-coupling reaction by several aryl halides and phenylboronic acid under mild conditions in high yield.</p>
Data from: Optimization and kinetic study of methyl laurate synthesis using ionic liquid [Hnmp]HSO4 as a catalyst
Methyl laurate was synthesized from lauric acid (LA) and methanol via an esterification reaction using ionic liquids (ILs) as catalysts. The efficiencies of three different catalysts, 1-methylimidazole hydrogen sulfate ([Hmim]HSO4), 1-methyl-2-pyrrolidonium hydrogen sulfate ([Hnmp]HSO4) and H2SO4, were compared. The effect of the methanol/LA molar ratio, reaction temperature, reaction time and catalyst dosage on the esterification rate of LA was investigated by single-factor experiments. Based on the single-factor experiments, the esterification of LA and methanol was optimized using response surface methodology. The results showed that the most effective catalyst was the IL [Hnmp]HSO4. The optimal conditions were as follows: [Hnmp]HSO4 dosage of 5.23%, methanol/LA molar ratio of 7.68 : 1, reaction time of 2.27 h and reaction temperature of 70°C. Under these conditions, the LA conversion of the esterification reached 98.58%. A kinetic study indicated that the esterification was a second-order reaction with an activation energy and a frequency factor of 68.45 kJ mol−1 and 1.9189 × 109 min−1, respectively. The catalytic activity of [Hnmp]HSO4 remained high after five cycles.
DEVELOPMENT OF HYBRID CATALYST AND SYNTHESIS OF LIQUID HYDROCARBONS BASED ON THEM
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RECOVERY OF HIGH MOLECULAR HYDROCARBONS FROM SYNTHESIS GAS AND PHYSICO-CHEMICAL CHARACTERISTICS OF THE CATALYST
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Data from: Optimization and kinetic study of methyl laurate synthesis using ionic liquid [Hnmp]HSO4 as a catalyst
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