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Journal articles on the topic 'Ruthenium – Industrial applications'

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Published: 4 June 2021
Last updated: 6 February 2022

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1

Genet, Jean Pierre, Angela Marinetti, and Virginie Ratovelomanana-Vidal. "Recent advances in asymmetric catalysis. Synthetic applications to biologically active compounds." Pure and Applied Chemistry 73, no. 2 (January 1, 2001): 299–303. http://dx.doi.org/10.1351/pac200173020299.

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New chiral cationic ruthenium complexes have been used for the industrial synthesis of (+) -dihydrojasmonate. A new class of electron-rich C2-symmetric 2,4-disubstituted phosphetanes (CnrPHOS) was developed. Preliminary evaluation of their catalytic properties revealed high efficiency in rhodium and ruthenium-catalyzed asymmetric hydrogenations. A new stereochemical model is presented in which the phosphetane Rh-catalyzed hydrogenation follows an apparent stability-controlled mechanism.
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2

Phansavath, Phannarath, Virginie Ratovelomanana-Vidal, Sudipta Ponra, and Bernard Boudet. "Recent Developments in Transition-Metal-Catalyzed Asymmetric Hydrogenation of Enamides." Synthesis 53, no. 02 (October 20, 2020): 193–214. http://dx.doi.org/10.1055/s-0040-1705939.

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AbstractThe catalytic asymmetric hydrogenation of prochiral olefins is one of the most widely studied and utilized transformations in asymmetric synthesis. This straightforward, atom economical, inherently direct and sustainable strategy induces chirality in a broad range of substrates and is widely relevant for both industrial applications and academic research. In addition, the asymmetric hydrogenation of enamides has been widely used for the synthesis of chiral amines and their derivatives. In this review, we summarize the recent work in this field, focusing on the development of new catalytic systems and on the extension of these asymmetric reductions to new classes of enamides.1 Introduction2 Asymmetric Hydrogenation of Trisubstituted Enamides2.1 Ruthenium Catalysts2.2 Rhodium Catalysts2.3 Iridium Catalysts2.4 Nickel Catalysts2.5 Cobalt Catalysts3 Asymmetric Hydrogenation of Tetrasubstituted Enamides3.1 Ruthenium Catalysts3.2 Rhodium Catalysts3.3 Nickel Catalysts4 Asymmetric Hydrogenation of Terminal Enamides4.1 Rhodium Catalysts4.2 Cobalt Catalysts5 Rhodium-Catalyzed Asymmetric Hydrogenation of Miscellaneous Enamides6 Conclusions
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3

Urbala, Magdalena. "Highly Productive Synthesis of 1-Propenyloxybutan-1-ol Under Solvent-Free Homogeneous Ruthenium Catalyst Conditions." Catalysts 10, no. 12 (December 2, 2020): 1409. http://dx.doi.org/10.3390/catal10121409.

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The 1-propenyl ethers bearing free hydroxyl groups of CH3CH=CH–O–A–OH type (hydroxyalkyl 1-propenyl ethers, 1-propenyloxyalcohols) are the most desired as the reactive diluents for photopolymerizable systems with enhanced reactivity or intermediates for the synthesis of hybrid monomers for special applications. The ruthenium complexes-catalyzed isomerization of allyl ethers under solvent-free conditions is an atom-economical and environmentally sustainable method for their production. Here, the reaction conditions and limitations for the highly productive and selective synthesis of model 4-(1-propenyloxy)butan-1-ol have been investigated. The minimal loading of ruthenium pre-catalysts needed for completion of reaction within reasonable times was priority assumption. It was found that [RuClH(CO)(PPh3)3] or [RuCl2(PPh3)3] exhibited extremely high catalytic activity under optimized non-oxidative reaction conditions. The key effect of reaction temperature on the activation pre-catalyst and the exothermal effects of isomerization was discovered. The practically quantitative yields of 4-(1-propenyloxy)butan-1-ol were achieved with using of very low loading of [Ru] (5 ppm) and Bu3N (to maintain reaction chemoselectivity) at the temperature of 120 °C for only 0.5 h. Consequently, the attained TON (turnover number) and TOF (turnover frequency) values of ca. 198,000 and 390,000 h−1 were unprecedentedly high and industrial attractive. On the other hand, the direct recycling of ruthenium catalyst is not a reasonable method for improving catalyst productivity.
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4

Michrowska, Anna, and Karol Grela. "Quest for the ideal olefin metathesis catalyst." Pure and Applied Chemistry 80, no. 1 (January 1, 2008): 31–43. http://dx.doi.org/10.1351/pac200880010031.

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Attempts were made to create a catalyst that approaches Gladysz's vision of an "ideal catalyst". Modifications of the Hoveyda-Grubbs catalyst were carried out with the aim to increase its activity and broaden the scope of its applicability to challenging metathesis reactions. This was done by introduction of an electron-withdrawing substituent on the isopropoxybenzylidene group in order to diminish the donor properties of the oxygen atom. The resulting stable and easily accessible nitro-substituted Hoveyda-Grubbs catalyst has found a number of successful applications in various research and industrial laboratories. Also, a new concept for noncovalent immobilization of a ruthenium olefin metathesis catalyst is presented. The 2-isopropoxybenzylidene ligand of Hoveyda-Grubbs carbene is further modified by an additional amino group, and immobilization is achieved by treatment with sulfonated polystyrene, forming the corresponding ammonium salt. In this novel strategy for the immobilization of ruthenium-based metathesis catalysts, the amino group plays a dual role, being first an active anchor for immobilization and secondly, after protonation, activating the catalysts by electron-donating to -withdrawing switch. The same concept has been used in the preparation of a quaternary ammonium catalyst for aqueous olefin metathesis.
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5

Ratovelomanana-Vidal, V., C. Girard, R. Touati, J. P. Tranchier, B. Ben Hassine, and J. P. Genêt. "Enantioselective Hydrogenation of β-Keto Esters using Chiral Diphosphine-Ruthenium Complexes: Optimization for Academic and Industrial Purposes and Synthetic Applications." Advanced Synthesis & Catalysis 345, no. 12 (January 2003): 261–74. http://dx.doi.org/10.1002/adsc.200390021.

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6

Bora, Anil, P. P. Singha, P. S. Robi, and A. Srinivasan. "Powder metallurgy processing of ruthenium aluminum alloys." Journal of Materials Processing Technology 153-154 (November 2004): 952–57. http://dx.doi.org/10.1016/j.jmatprotec.2004.04.155.

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7

Shaffer, O. L., M. W. Sandor, and M. S. El-Aasser. "Morphology and Film Properties of Composite Carboxylated Latexes." Microscopy and Microanalysis 5, S2 (August 1999): 986–87. http://dx.doi.org/10.1017/s1431927600018250.

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In industrial applications, such as paints or adhesives, composite latex particles are very common. Most of the properties which are obtained from composite latexes and their films cannot be achieved by physical blending of different polymer components. Therefore it becomes crucial to examine the morphology of composite latexes formed by a multiple-stage polymerization process. The latexes for this study have been examined by transmission electron microscopy (TEM) and atomic force microscopy (AFM). Various staining methods were used such as ruthenium tetroxide (RuO4), cesium hydroxide (CsOH), and uranyl acetate (UAc) as a negative stain.The poly(n-butyl acrylate/ poly(methylmethacrylate) (PBA/PMMA) composite latex particles consist of a soft core phase and a hard second phase with varying amounts of acrylic acid in the core, the shell and in both core and shell. The latexes were examined before and after cleaning by a centrifugation technique with 100,000 molecular weight filters.
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8

Yeşildağ, Ali. "Ruthenium (III)–pyridine complex: Synthesis, characterization, barrier diode and photodiode applications in Al/Ru-Py/p-Si/Al sandwich device structure." Chemical Papers 75, no. 9 (June 1, 2021): 4949–58. http://dx.doi.org/10.1007/s11696-021-01715-7.

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9

Deng, Weiping, Yunzhu Wang, Sui Zhang, Krishna M. Gupta, Max J. Hülsey, Hiroyuki Asakura, Lingmei Liu, et al. "Catalytic amino acid production from biomass-derived intermediates." Proceedings of the National Academy of Sciences 115, no. 20 (April 30, 2018): 5093–98. http://dx.doi.org/10.1073/pnas.1800272115.

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Amino acids are the building blocks for protein biosynthesis and find use in myriad industrial applications including in food for humans, in animal feed, and as precursors for bio-based plastics, among others. However, the development of efficient chemical methods to convert abundant and renewable feedstocks into amino acids has been largely unsuccessful to date. To that end, here we report a heterogeneous catalyst that directly transforms lignocellulosic biomass-derived α-hydroxyl acids into α-amino acids, including alanine, leucine, valine, aspartic acid, and phenylalanine in high yields. The reaction follows a dehydrogenation-reductive amination pathway, with dehydrogenation as the rate-determining step. Ruthenium nanoparticles supported on carbon nanotubes (Ru/CNT) exhibit exceptional efficiency compared with catalysts based on other metals, due to the unique, reversible enhancement effect of NH3 on Ru in dehydrogenation. Based on the catalytic system, a two-step chemical process was designed to convert glucose into alanine in 43% yield, comparable with the well-established microbial cultivation process, and therefore, the present strategy enables a route for the production of amino acids from renewable feedstocks. Moreover, a conceptual process design employing membrane distillation to facilitate product purification is proposed and validated. Overall, this study offers a rapid and potentially more efficient chemical method to produce amino acids from woody biomass components.
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10

Shultz, Lorianne R., Corbin Feit, Jordan Stanberry, Zhengning Gao, Shaohua Xie, Vasileios A. Anagnostopoulos, Fudong Liu, Parag Banerjee, and Titel Jurca. "Ultralow Loading Ruthenium on Alumina Monoliths for Facile, Highly Recyclable Reduction of p-Nitrophenol." Catalysts 11, no. 2 (January 25, 2021): 165. http://dx.doi.org/10.3390/catal11020165.

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The pervasive use of toxic nitroaromatics in industrial processes and their prevalence in industrial effluent has motivated the development of remediation strategies, among which is their catalytic reduction to the less toxic and synthetically useful aniline derivatives. While this area of research has a rich history with innumerable examples of active catalysts, the majority of systems rely on expensive precious metals and are submicron- or even a few-nanometer-sized colloidal particles. Such systems provide invaluable academic insight but are unsuitable for practical application. Herein, we report the fabrication of catalysts based on ultralow loading of the semiprecious metal ruthenium on 2–4 mm diameter spherical alumina monoliths. Ruthenium loading is achieved by atomic layer deposition (ALD) and catalytic activity is benchmarked using the ubiquitous para-nitrophenol, NaBH4 aqueous reduction protocol. Recyclability testing points to a very robust catalyst system with intrinsic ease of handling.
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11

Benhadjala, Warda, Florence Sonnerat, Jennifer Guillaume, Christel Dieppedale, Philippe Renaux, Gwenaël Le Rhun, Henri Sibuet, and Christophe Billard. "Highly tunable Mn-doped PZT thin films for integrated RF devices." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2015, DPC (January 1, 2015): 002095–127. http://dx.doi.org/10.4071/2015dpc-tha33.

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Modern RF systems have triggered an important and urgent demand for inexpensive voltage controlled capacitors used for a wide range of applications such as tunable antennas or low-noise voltage-controlled oscillators (VCO). Ferroelectric materials have received considerable interest for electrically tunable dielectrics due to their high dielectric constant and large dielectric nonlinearity under dc bias field. Lead zirconate titanate (PZT) ceramics which have been under intense investigation for various industrial domains including micro-electro-mechanical systems (MEMS), non-volatile memories, and high-k capacitors, are especially well-known candidate materials due to their unequalled ferroelectric properties and stability in device operating ranges. However, reported voltage tunability of PZT films is relatively low (~35%@4GHz) and remains insufficient for microwave tunable devices. Therefore, much attention has been focused on the PZT modification by adding a small amount of dopants. Shao et al., studied strontium-doped PZT (PSZT) thin films and achieved a tunability of 48% @1MHz. More recently, Hu et al. reported a tunability of 65%@10kHz for lanthanum-modified PZT (PLZT) films. In the presented study, effect of manganese (Mn) doping on electrical properties of PZT (PMZT) thin films has been investigated. Metal/insulator/metal (MIM) capacitors using PZT-based thin films and ruthenium (Ru) top electrodes were processed on platinized (Pt) silicon wafers by a sol gel method. Dielectric properties of PMZT thin films were studied by varying the dopant amount and compared to those of pure PZT layers. At this end, on-wafer electrical measurements were conducted with a particular attention on leakage current characterization and RF measurements under DC bias voltage. We have shown that leakage current density decreased from 6.5 μA/cm2 to 1 μA/cm2 at 850kV/cm by doping PZT with Mn. Observed conduction mechanisms will be discussed in detail in the full-length paper. Moreover, developed PZT-based thin films exhibit high dielectric strengths achieving 2.1MV/cm and outstanding tunability as high as 85% (~7:1) @1GHz at bias voltage of 20V. Thus, PMZT tunability is among the highest ones reported in the literature for PZT-derived thin films but also for other piezoelectric materials. Indeed, in comparison, the tunability of BST-based materials, typically studied for voltage tunable applications, does not exceed 5:1. These remarkable results indicate that Mn-doped PZT thin films are promising candidates for RF tunable capacitors.
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12

Tumenov, Arthur, Ahmediyar Dzhunusov, and Serik Bakiyev. "Results of the Combined Application of Various Schemes of Stimulation of Caviar Ovulation in Sterlet Producers Under Conditions of Regulated Systems." Natural Systems and Resources, no. 2 (October 2020): 51–55. http://dx.doi.org/10.15688/nsr.jvolsu.2020.2.6.

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The article presents the results of studies of schemes for stimulating ovulation of sturgeon caviar during rearing under conditions of regulated systems. Sturgeon (Acipenseridae) fish are characterized by high quality caviar and meat, and therefore are one of the main objects of cultivation in modern aquaculture. The achievement of sexual maturity of sturgeon fish when grown in facilities with a closed water supply cycle depends on the compliance with temperature and oxygen conditions, as well as species and the general physiological state of the fish itself. In modern aquaculture of sturgeon fish, the main species of cultivation are the following: beluga (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii), Siberian sturgeon (Acipenser baerii), sterlet (Acipenser ruthenus) and their hybrids. Sterletт (Acipenser ruthenus) in comparison with other species of sturgeon fish reaches puberty at a much earlier date. The studies were carried out on the basis of LLP “Educational and Scientific Complex of Pilot Industrial Production of Aquaculture”. As it is known, pituitary injections and synthetic drugs activating the pituitary gland of sturgeons are used to stimulate producers. The study used sexually mature sterlet (Acipenser ruthenus) injected according to the combined stimulation schemes for carp pituitary gland and synthetic preparations “Surfagon”, “Nerestin-5”. To determine the effectiveness of using combined stimulation schemes for carp pituitary gland and synthetic preparations “Surfagon”, “Nerestin-5”, sterlet producers (Acipenser ruthenus) were divided into 3 groups of 20 individuals. As a result of the studies, the following fish-breeding and biological indicators of sterlet producers (Acipenser ruthenus) have been determined: weight of fish, weight of eggs obtained, as well as percentage of eggs to the total weight of fish.
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13

Khalifa, Ashraf, and Munira Aldayel. "Isolation and characterisation of the agarolytic bacterium Pseudoalteromonas ruthenica." Open Life Sciences 14, no. 1 (December 31, 2019): 588–94. http://dx.doi.org/10.1515/biol-2019-0066.

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AbstractAgar is a polysaccharide that primarily constitutes the cell wall of red algae. It is a good source of carbon and energy for many microbes. In the present study, an agarolytic bacterium, UQAD-3, was obtained from the waters of Al-Uqair, the Arabian Gulf, Al-Ahsaa, Saudi Arabia. UQAD-3 exhibited agarolytic activity when grown on agar as the sole source of carbon and energy. The strain was identified as Pseudoalteromonas ruthenica based on comparative analysis of the 16S rRNA, with 99.6% similarity. This finding was further confirmed by phylogenetic analyses based on 16S rRNA gene sequences, which highlighted that UQAD-3 was assembled within the Pseudoalteromonas clade and constituted a monophyletic subcluster with P. ruthenica, KMM 300T. The strain was further characterised biochemically using the Biolog Gen III microtest system. UQAD-3 showed positive reactions to 16 (17%) of the 94 diverse traits assessed. Good growth was reported in 10% NaCl indicating its moderate halophilic nature. These observations indicate the agarolytic potential of the strain and opens new horizons for industrial applications in the future.
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14

Deshmukh, P. R., S. V. Patil, R. N. Bulakhe, S. D. Sartale, and C. D. Lokhande. "Inexpensive synthesis route of porous polyaniline–ruthenium oxide composite for supercapacitor application." Chemical Engineering Journal 257 (December 2014): 82–89. http://dx.doi.org/10.1016/j.cej.2014.06.038.

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15

Muto, Akinoiri, Yuki Tohji, Thallada Bhaskar, and Yusaku Sakata. "Preparation of Ruthenium-Porous Carbon Composite from a Chelate Resin and Its Application to Capacitor Electrode." Journal of the Japan Society of Powder and Powder Metallurgy 53, no. 12 (2006): 971–77. http://dx.doi.org/10.2497/jjspm.53.971.

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16

Wysocka, Izabela, Jan Hupka, and Andrzej Rogala. "Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process." Catalysts 9, no. 6 (June 17, 2019): 540. http://dx.doi.org/10.3390/catal9060540.

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Dry reforming of methane (DRM) is an eco-friendly method of syngas production due to the utilization of two main greenhouse gases—methane and carbon dioxide. An industrial application of methane dry reforming requires the use of a catalyst with high activity, stability over a long time, and the ability to catalyze a reaction, leading to the needed a hydrogen/carbon monoxide ratio. Thus, the aim of the study was to investigate the effect of support and noble metal particles on catalytic activity, stability, and selectivity in the dry reforming process. Ni and Ni–Ru based catalysts were prepared via impregnation and precipitation methods on SiO2, ZrO2, Al2O3, and MgAl2O4 supports. The obtained catalysts were characterized using X-ray diffractometry (XRD), inductively coupled plasma optical emission spectrometry (ICP-OES), Brunauer–Emmett–Teller (BET) specific surface area, and elemental carbon-hydrogen-nitrogen-sulphur analysis (CHNS) techniques. The catalytic activity was investigated in the carbon dioxide reforming of a methane process at 800 °C. Catalysts supported on commercial Al2O3 and spinel MgAl2O4 exhibited the highest activity and stability under DRM conditions. The obtained results clearly indicate that differences in catalytic activity result from the dispersion, size of an active metal (AM), and interactions of the AM with the support. It was also found that the addition of ruthenium particles enhanced the methane conversion and shifted the H2/CO ratio to lower values.
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17

Prasad, Vinay, and Dionisios G. Vlachos. "Multiscale Model and Informatics-Based Optimal Design of Experiments: Application to the Catalytic Decomposition of Ammonia on Ruthenium." Industrial & Engineering Chemistry Research 47, no. 17 (September 3, 2008): 6555–67. http://dx.doi.org/10.1021/ie800343s.

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18

Guilherme Vieira, Mauricio. "Construction of a New Sensor with Ruthenium Complex Anchored in Functionalized Silica and Their Application in Determination of Ascorbic Acid in Industrial Fruit Juice." International Journal of Sensors and Sensor Networks 5, no. 2 (2017): 27. http://dx.doi.org/10.11648/j.ijssn.20170502.12.

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19

Abdullah, Norulsamani, R. Saidur, Azran Mohd Zainoodin, and Navid Aslfattahi. "Optimization of electrocatalyst performance of platinum–ruthenium induced with MXene by response surface methodology for clean energy application." Journal of Cleaner Production 277 (December 2020): 123395. http://dx.doi.org/10.1016/j.jclepro.2020.123395.

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20

Ogawa, T., M. Fujii, T. Asai, A. Ikegami, and T. Kobayashi. "Application of Copper Conductor and Ruthenium Containing Oxides-Glass Resistor to High-Frequency Hybrid IC's for a Portable Cellular Radio." IEEE Transactions on Components, Hybrids, and Manufacturing Technology 11, no. 2 (June 1988): 211–17. http://dx.doi.org/10.1109/tchmt.1988.1134903.

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21

Ratovelomanana-Vidal, V., C. Girard, R. Touati, J. P. Tranchier, B. Ben Hassine, and J. P. Genet. "Enantioselective Hydrogenation of β-Keto Esters Using Chiral Diphosphine-Ruthenium Complexes: Optimization for Academic and Industrial Purposes and Synthetic Applications." ChemInform 34, no. 24 (June 17, 2003). http://dx.doi.org/10.1002/chin.200324031.

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22

Antonetti, Claudia, Anna Maria Raspolli Galletti, and Iginio Longo. "An Innovative Microwave Process for Nanocatalyst Synthesis." International Journal of Chemical Reactor Engineering 8, no. 1 (January 5, 2010). http://dx.doi.org/10.2202/1542-6580.2132.

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The development of greener chemical processes is becoming more and more important because this approach moves towards sustainable methods and products, minimizing pollution and risks for human health and environment. In these perspectives, microwaves seem to fulfil these requirements; in this context, we have tested a novel method both for the synthesis of nanocatalysts and for thermal activation of catalytic reactions. Until now, microwave chemistry has been generally performed inside a closed metal cavity, i.e. a microwave oven, but this approach presents relevant drawbacks, in particular for large scale application. Recently, we have proposed a new, cheap, sustainable process for large scale preparation of nanocatalysts, overcoming the disadvantages of the current synthesis methods. This novel method has been successfully adopted for the preparation in situ of ruthenium, palladium and silver nanoparticles as colloids or on different supports. Our procedure is safe and cheap, enabling to obtain the utmost efficiency and control also for industrial application. The obtained nanocatalysts present small average diameters, good morphology and very narrow sizes distribution with an absolute reproducibility. The ruthenium nanocatalysts were tested in the selective hydrogenation of phenol to cyclohexanone and palladium nanocatalysts were tested in the selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde, and we obtained good performances in both reactions.
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23

Jiang, Kang, Min Luo, Zhixiao Liu, Ming Peng, Dechao Chen, Ying-Rui Lu, Ting-Shan Chan, Frank M. F. de Groot, and Yongwen Tan. "Rational strain engineering of single-atom ruthenium on nanoporous MoS2 for highly efficient hydrogen evolution." Nature Communications 12, no. 1 (March 16, 2021). http://dx.doi.org/10.1038/s41467-021-21956-0.

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AbstractMaximizing the catalytic activity of single-atom catalysts is vital for the application of single-atom catalysts in industrial water-alkali electrolyzers, yet the modulation of the catalytic properties of single-atom catalysts remains challenging. Here, we construct strain-tunable sulphur vacancies around single-atom Ru sites for accelerating the alkaline hydrogen evolution reaction of single-atom Ru sites based on a nanoporous MoS2-based Ru single-atom catalyst. By altering the strain of this system, the synergistic effect between sulphur vacancies and Ru sites is amplified, thus changing the catalytic behavior of active sites, namely, the increased reactant density in strained sulphur vacancies and the accelerated hydrogen evolution reaction process on Ru sites. The resulting catalyst delivers an overpotential of 30 mV at a current density of 10 mA cm−2, a Tafel slope of 31 mV dec−1, and a long catalytic lifetime. This work provides an effective strategy to improve the activities of single-atom modified transition metal dichalcogenides catalysts by precise strain engineering.
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