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Relevant bibliographies by topics / Iridium catalysts

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Journal articles

Academic literature on the topic 'Iridium catalysts'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 January 2023

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Journal articles on the topic "Iridium catalysts"

1

Siebert, Max, Golo Storch, Frank Rominger, and Oliver Trapp. "Temperature-Controlled Bidirectional Enantioselectivity in Asymmetric Hydrogenation Reactions Utilizing Stereodynamic Iridium Complexes." Synthesis 49, no. 15 (2017): 3485–94. http://dx.doi.org/10.1055/s-0036-1588861.

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Stereochemically flexible 2,2(-bis(diphenylphosphino)biphenyl (BIPHEP) ligands were modified with chiral α-substituted carboxylic acid auxiliaries in the 3- and 3′-position. The resulting central-to-axial chirality transfer to the stereochemically flexible chiral axis of the BIPHEP core was investigated as well as complexation of these diastereomeric ligands to iridium(I). Solid-state structures of both ligand diastereomers and a diastereomerically pure iridium(I) BIPHEP complex were obtained. Thermal equilibration of the resulting iridium(I) complexes was studied to investigate the stereodyn

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2

Lukey, CA, MA Long, and JL Garnett. "Aromatic Hydrogen Isotope Exchange Reactions Catalyzed by Iridium Complexes in Aqueous Solution." Australian Journal of Chemistry 48, no. 1 (1995): 79. http://dx.doi.org/10.1071/ch9950079.

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Sodium hexachloroiridate (III) and sodium hexachloroiridate (IV) have been used as homogeneous catalysts for hydrogen isotope exchange between benzenoid compounds and water. The ideal solvent consisted of 50 mole % acetic acid/water, and the optimum temperature was found to be 160°C. Under these conditions the rate of incorporation of deuterium into benzene was significant (typically 15% D in 6 h), and reduction to iridium metal was minimized. The active catalytic species was identified as a solvated iridium(III) species, which is also postulated to be the active catalyst in solutions containi

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3

Frety, R., P. N. Da Silva, and M. Guenin. "Supported iridium catalysts." Applied Catalysis 57, no. 1 (1990): 99–103. http://dx.doi.org/10.1016/s0166-9834(00)80726-5.

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4

Yoo, Dalsan, Jaegyu Woo, Seolyeong Oh, and Jong-Ki Jeon. "Performance of Pt and Ir Supported on Mesoporous Materials for Decomposition of Hydroxylammonium Nitrate Solution." Journal of Nanoscience and Nanotechnology 20, no. 7 (2020): 4461–65. http://dx.doi.org/10.1166/jnn.2020.17598.

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The catalytic decomposition of hydroxylammonium nitrate (HAN) was investigated using a series of platinum and iridium supported on mesoporous materials. In this study, MMZY, KIT-6, and SBA-15 were used as supports. The effects of the active metal and the pore structure of the catalysts on decomposition of HAN solution were studied. The activity of the platinum catalysts supported on mesoporous material is much superior to that of the iridium catalysts on the same support. The Pt(10)/SBA-15 catalyst showed excellent decomposition activity and was the best among the catalysts tested here, which

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5

Amirsardari, Zahra, Akram Dourani, Mohamad Ali Amirifar, Nooredin Ghadiri Massoom, and Rahim Ehsani. "Development of novel supported iridium nanocatalysts for special catalytic beds." Journal of Nanostructure in Chemistry 10, no. 1 (2019): 47–53. http://dx.doi.org/10.1007/s40097-019-00327-8.

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Abstract In the present paper, an experimental study of the catalytic decomposition of hydrous hydrazine was investigated on the different structural forms of the catalyst. The synthesized iridium catalysts have been usually used directly and have not been evaluated in the laboratory reactor. This study includes the preparation of iridium-based catalysts supported on spherical (alumina), honeycomb monoliths (cordierite) and foams (alumina) for the evaluation of catalytic activity in the laboratory reactor. The characterizations of these catalysts were evaluated by the TGA, FESEM and BET analys

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6

Jiménez, M. Victoria, Ana Ojeda-Amador, Raquel Puerta-Oteo, Joaquín Martínez-Sal, Vincenzo Passarelli, and Jesús Pérez-Torrente. "Selective Oxidation of Glycerol via Acceptorless Dehydrogenation Driven by Ir(I)-NHC Catalysts." Molecules 27, no. 22 (2022): 7666. http://dx.doi.org/10.3390/molecules27227666.

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Iridium(I) compounds featuring bridge-functionalized bis-NHC ligands (NHC = N-heterocyclic carbene), [Ir(cod)(bis-NHC)] and [Ir(CO)2(bis-NHC)], have been prepared from the appropriate carboxylate- or hydroxy-functionalized bis-imidazolium salts. The related complexes [Ir(cod)(NHC)2]+ and [IrCl(cod)(NHC)(cod)] have been synthesized from a 3-hydroxypropyl functionalized imidazolium salt. These complexes have been shown to be robust catalysts in the oxidative dehydrogenation of glycerol to lactate (LA) with dihydrogen release. High activity and selectivity to LA were achieved in an open system un

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7

Kumar, Prashant, Torsten Irrgang, George E. Kostakis, and Rhett Kempe. "Phosphine-free chiral iridium catalysts for asymmetric catalytic hydrogenation of simple ketones." RSC Adv. 6, no. 45 (2016): 39335–42. http://dx.doi.org/10.1039/c6ra04524c.

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Phosphine free iridium catalysts with simple structures show efficient enantioselectivities and activities in the asymmetric hydrogenation of simple ketones by using chiral iridium catalysts to chiral alcohols with up to 96% ee.

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8

Espinosa-Moreno, Francisco, Putrakumar Balla, Wenjie Shen, Juan Chavarria-Hernandez, Miguel Ruiz-Gómez, and Saúl Tlecuitl-Beristain. "Ir-Based Bimetallic Catalysts for Hydrogen Production through Glycerol Aqueous-Phase Reforming." Catalysts 8, no. 12 (2018): 613. http://dx.doi.org/10.3390/catal8120613.

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Iridium, Iridium-Nickel and Iridium-Copper catalysts were prepared by incipient wetness impregnation and evaluated in the aqueous-phase reforming of glycerol using La2O3 or CeO2 as supports. The catalysts were characterized by N2 physisorption, XRD, H2-TPR, XPS, and EDS. The reactions were carried out in a fixed bed reactor feeding a solution of glycerol (10 wt %) in water, at 270 °C and 58 bar. All IrNi catalysts showed higher activity than Ir and IrCu, and in general, La2O3 catalysts showed a better performance when compared to CeO2 catalysts. The highest hydrogen production yield was reache

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9

Pham, Pierce, and Christian Hilty. "Tunable iridium catalyst designs with bidentate N-heterocyclic carbene ligands for SABRE hyperpolarization of sterically hindered substrates." Chemical Communications 56, no. 98 (2020): 15466–69. http://dx.doi.org/10.1039/d0cc06840c.

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A series of iridium catalysts provides NMR sensitivity enhancement using para-hydrogen. The substrate exchange rate can be tuned for optimal polarization by the choice of an aryl and a nucleophilic moiety in the catalyst.

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10

Slavcheva, Evelina P. "Magnetron sputtered iridium oxide as anode catalyst for PEM hydrogen generation." Macedonian Journal of Chemistry and Chemical Engineering 30, no. 1 (2011): 45. http://dx.doi.org/10.20450/mjcce.2011.69.

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Thin films of iridium oxide are deposited by reactive magnetron sputtering. The influence of oxygen partial pressure in the sputtering plasma on the composition, surface structure and morphology of the films has been studied by XRD, SEM, AFM and XPS analysis. An optimal combination of sputtering parameters yields stable microporous amorphous films with highly extended fractal surface. The electrochemical properties of these films are investigated in view of their application as catalysts for PEM water splitting, using the electrochemical techniques of cyclovoltammetry and steady state polariza

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