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Relevant bibliographies by topics / Lay catalysis

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Journal articles

Academic literature on the topic 'Lay catalysis'

Author: Grafiati

Published: 20 April 2024

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Journal articles on the topic "Lay catalysis"

1

Zhang, Lian Zi, and Hao Yuan Sun. "Development of Catalysts for Synthesizing Methanol from Syngas." Materials Science Forum 1053 (February 17, 2022): 165–69. http://dx.doi.org/10.4028/p-0eor9r.

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At present, methanol is one of the most basic organic chemical raw materials and energy storage media. With the development of chemical technology and energy storage technology, its application becomes more and more extensive, and the methanol market prospects are unlimited. Industrial-scale methanol is generally prepared by using synthesis gas containing hydrogen, carbon monoxide, and carbon dioxide as raw materials and reacting under a certain pressure, temperature, and catalyst. Therefore, the development of the methanol industry largely depends on the development of catalysts and the improvement of their performance. Metal catalysts are mainly used in the industry for reaction. This article reviews several metal catalysts used to synthesize methanol from syngas. Copper-based and iron-based catalysts are widely used, and the emerging rhodium and its ligand catalysts exhibit good catalytic performance in low-temperature catalysis. In the future, the scientific research team will focus on in-depth research on preparation methods, active centers, catalytic reaction kinetics, durability, metal ligands, raw material prices, etc., to lay a solid foundation for the industrial application of syngas to methanol in advance.

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2

Poier, Dario, Sharon Mitchell, Victor Tulus, Gonzalo Guillén-Gosálbez, Javier Pérez-Ramírez, and Roger Marti. "Aiming for More Sustainable Cross-Coupling Chemistry by Employing Single-Atom Catalysis on Scale." CHIMIA 77, no. 3 (2023): 127. http://dx.doi.org/10.2533/chimia.2023.127.

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Scaling up syntheses from mg to kg quantities is a complex endeavor. Besides adapting laboratory protocols to industrial processes and equipment and thorough safety assessments, much attention is paid to the reduction of the process’ environmental impact. For processes including transition metal catalyzed steps, e.g. cross-coupling chemistry, this impact strongly depends on the identity of the metal used. As such, a key approach is the replacement of single-use with reusable heterogeneous catalysts. Transition metal single-atom heterogeneous catalysts (SAC), a novel class of catalytic materials, might exhibit all the necessary properties to step up to this task. This article shall discuss current applications of SAC in cross-coupling chemistry from the point of a process chemist and shed light on the NCCR Catalysis contribution to the field. Investigations of the stability-activity-selectivity relationship of SACs in combination with early-stage life-cycle assessments (LCA) of potential processes lay the foundation for large-scale application tailored catalyst synthesis. Ultimately, prevailing challenges are highlighted, which need to be addressed in future research.

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3

García, Pablo, Enrique Lima, Julia Aguilar, and Víctor Lara. "Fractal Extra-Framework Species in De-aluminated LaY Zeolites and Their Catalytic Activity." Catalysis Letters 128, no. 3-4 (2008): 385–91. http://dx.doi.org/10.1007/s10562-008-9761-5.

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4

Zhang, Qian, Qiyu Peng, Wenbin Li, Yanzhang Liu, and Xiaoxiong Wang. "Waste Plastic Recycling Upgrade Design Nanogenerator for Catalytic Degradation of Pollutants." Catalysts 13, no. 6 (2023): 1019. http://dx.doi.org/10.3390/catal13061019.

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In recent years, electrocatalytic degradation of pollutants based on nanogenerators has gradually emerged. Compared with the huge energy consumption of traditional electrocatalysis, this method can effectively use displacement current to induce charge transfer and complete catalysis, so it can directly use the existing water flow energy and other energy sources in nature. This work will explain the basic principles, methods, and measurement methods of preparing nanogenerators from waste plastics, as well as the classification of electrocatalytic principles and methods relative to nanogenerators, which provides important support for the research in this emerging field. At the same time, the analysis based on this knowledge will also lay the foundation for future design.

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5

Xu, Jiayi, Jinkui Pi, Yanjing Zhang, Jinhan Zhou, Shuxia Zhang, and Sisi Wu. "Effects of Ferroptosis on Cardiovascular Diseases." Mediators of Inflammation 2023 (May 4, 2023): 1–11. http://dx.doi.org/10.1155/2023/6653202.

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Ferroptosis is a novel form of programmed cell death characterized by the accumulation of iron-dependent lipid peroxides, which causes membrane injury. Under the catalysis of iron ions, cells deficient in glutathione peroxidase (GPX4) cannot preserve the balance in lipid oxidative metabolism, and the buildup of reactive oxygen species on the membrane lipids leads to cell death. An increasing body of evidence suggests that ferroptosis plays a significant role in the development and occurrence of cardiovascular diseases. In this paper, we mainly elaborated on the molecular mechanisms regulating ferroptosis and its impact on cardiovascular disease to lay the groundwork for future studies on the prophylaxis and treatment of this patient population.

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6

Bowker, M. "The effect of coke lay-down on n-heptane reforming on Pt and Pt-Sn catalysts." Applied Catalysis A: General 257, no. 1 (2004): 57–65. http://dx.doi.org/10.1016/s0926-860x(03)00613-6.

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7

Hoyle, Jeffrey, J. Stuart Grossert, Donald L. Hooper, and Subramanian Sotheeswaran. "Sulphur-33 nuclear magnetic resonance spectroscopy of sulphones." Canadian Journal of Chemistry 64, no. 8 (1986): 1581–84. http://dx.doi.org/10.1139/v86-261.

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The sulphur-33 nmr spectra of 28 sulphones were measured in deuterochloroform solutions at 27.716172 MHz. The spectra were referenced with respect to an external aqueous ammonium sulphate solution and the chemical shifts lay in the range 0 ± 20 ppm, with many lines having a half-height width of less than 200 Hz. Instrumental parameters that affect the spectra were studied. Some of the sulphur-33 resonances can be correlated well with carbon-13 or oxygen-17 resonances in appropriate analogous compounds, and with the Taft σ* parameter.

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8

Aloni, Sapir Shekef, Molhm Nassir, and Yitzhak Mastai. "Chiral Porous Carbon Surfaces for Enantiospecific Synthesis." Polymers 14, no. 14 (2022): 2765. http://dx.doi.org/10.3390/polym14142765.

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Chiral surfaces, developed in the last decade, serve as media for enantioselective chemical reactions. Until today, they have been based mostly on developments in silica templating, and are made mainly from imprints of silicate materials developed a long time ago. Here, a chiral porous activated carbon surface was developed based on a chiral ionic liquid, and the surface chemistry and pore structure were studied to lay a new course of action in the field. The enantioselectivities of surfaces are examined by using variety of methods such as circular dichroism, linear sweep voltammetry and catalysis. These techniques revealed a 28.1% preference for the D enantiomer of the amino acid proline, and linear sweep voltammetry confirmed chirality recognition by another probe. An aldol surface chiral catalytic reaction was devised and allowed to determine the root of the enantiomeric excess. These results affirm the path toward a new type of chiral surface.

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9

Cong, Fangdi, Hongzhen Jiang, Xiguang Du, Shulin Zhang, and Wei Yang. "Facile, Mild-Temperature Synthesis of Metal-Free Phthalocyanines." Synthesis 53, no. 15 (2021): 2656–64. http://dx.doi.org/10.1055/a-1499-8865.

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AbstractIt is important for the synthesis and research of phthalocyanine compounds for these compounds to be easily obtained at low temperature. We observed that metal-free phthalocyanine was sometimes found in a simple system used to synthesize phthalocyanine precursors at room temperature, and further studies showed that the key to the effective formation of phthalocyanines at low temperature lay in the presence of equal volumes of alcohol and amine, in addition to substrate phthalonitriles and solvents, in the reaction system. A synthetic mechanism was proposed and facile syntheses have been realized, such as the synthesis of tetra-α(β)-nitrophthalocyanines and tetra-α(β)-(4-tert-butylphenoxy)phthalocyanines from the corresponding substituted phthalonitriles at mild temperature (37 °C). The results are significant for the design and synthesis of new phthalocyanine derivatives, and the method is convenient and easy to adopt for general use in standard laboratories.

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10

Rizkin, Benjamin A., та Ryan L. Hartman. "Activation of homogenous polyolefin catalysis with a machine-assisted reactor laboratory-in-a-box (μAIR-LAB)". Reaction Chemistry & Engineering 5, № 8 (2020): 1450–60. http://dx.doi.org/10.1039/d0re00139b.

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Catalysis discovery is typically limited to specialized labs – this work demonstrates an Artificially Intelligent Microreactor Lab in a Box applied to investigate the chemistry of different co-catalysts for zirconocene-catalyzed olefin polymerization.

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