Relevant bibliographies by topics / Atome promoteur

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Atome promoteur'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Atome promoteur"

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Ye, Fei, Ya Kun Wang, Fei Fan Xu, and Ke Tong. "Effects of Interstitial Nitrogen Atoms on Atomic Oxygen Adsorption on Fe (001) Surface from Ab Initio Calculations." Materials Science Forum 898 (June 2017): 849–55. http://dx.doi.org/10.4028/www.scientific.net/msf.898.849.

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The effects of interstitial nitrogen atoms on the adsorption of atomic oxygen on fcc Fe (001) surface have been studied using ab initio density functional theory calculations to understand the initial stage of oxidation on nitrogenous austenitic stainless steel. It has been found out that the N atoms can improve the adsorption ability of the O atom at the hollow site on the surface, and thus promote the rapid passivation of nitrogenous austenitic stainless steel. This improvement is possibly because the Coulombic interactions between the O atom and the neighboring Fe and Cr atoms are enhanced
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Luo, Mi, Jinyan Cai, Jiasui Zou, Zheng Jiang, Gongming Wang, and Xiongwu Kang. "Promoted alkaline hydrogen evolution by an N-doped Pt–Ru single atom alloy." Journal of Materials Chemistry A 9, no. 26 (2021): 14941–47. http://dx.doi.org/10.1039/d1ta03593b.

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N incorporation induces d orbital tuning and promotes water dissociation on Ru, while single Pt atoms facilitate H desorption. The two effects synergistically enable the excellent alkaline HER performance on an N-doped Pt–Ru single atom alloy.
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Cai, Jinmeng, Ang Cao, Zhenbin Wang, et al. "Surface oxygen vacancies promoted Pt redispersion to single-atoms for enhanced photocatalytic hydrogen evolution." Journal of Materials Chemistry A 9, no. 24 (2021): 13890–97. http://dx.doi.org/10.1039/d1ta01400e.

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In situ formed surface oxygen vacancies on TiO<sub>2</sub> can redisperse Pt nanoparticles to stable single-atoms through hydrogen spillover effect. The catalyst displays both high photocatalytic hydrogen evolution performance and atom-utilization efficiency.
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Gao, Can, Dewei Rao, Huan Yang, et al. "Dual transition-metal atoms doping: an effective route to promote the ORR and OER activity on MoTe2." New Journal of Chemistry 45, no. 12 (2021): 5589–95. http://dx.doi.org/10.1039/d0nj05606e.

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Bennett, Martin A., Nedaossadat Mirzadeh, Steven H. Privér, Jörg Wagler, and Suresh K. Bhargava. "Trinuclear Mixed-valent Gold Complexes Derived from 2-C6F4PPh2: Phosphine Oxide Complexes of Gold(III) and an ortho-Metallated Complex of Gold(I)." Zeitschrift für Naturforschung B 64, no. 11-12 (2009): 1463–68. http://dx.doi.org/10.1515/znb-2009-11-1229.

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Crystals of two mixed-valent gold complexes [(O2NO)AuI(μ-2-C6F4PPh2)AuIII{κ2-2-C6- F4P(O)Ph2}(μ-2-C6F4PPh2)AuI(ONO2)] (14) and [(O2NO)AuI(μ-2-C6F4PPh2)AuIII{κ3-2-C6F4- P(O)Ph(C6H4)}(μ-2-C6F4PPh2)AuI] (15) have been obtained from the reaction of the digold(I,III) complex [ClAuI(μ-2-C6F4PPh2)(κ2-2-C6F4PPh2)AuIIICl] (5) with, respectively, a small and a large excess of silver nitrate. Both complexes contain three, approximately collinear metal atoms, the central gold(III) atom being planar-coordinated by a chelate (O,C)-phosphine oxide formed by oxidation of 2-C6F4PPh2 and the carbon atoms of two
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LAURITSEN, J., J. KIBSGAARD, G. OLESEN, et al. "Location and coordination of promoter atoms in Co- and Ni-promoted MoS2-based hydrotreating catalysts." Journal of Catalysis 249, no. 2 (2007): 220–33. http://dx.doi.org/10.1016/j.jcat.2007.04.013.

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Bussey, Katherine A., Jennifer R. Connell, Annie R. McGlone та ін. "Crystal structure of {(but-3-en-1-yl)bis[(pyridin-2-yl)methyl]amine-κ3N,N′,N′′}dichloridocopper(II) diethyl ether hemisolvate". Acta Crystallographica Section E Crystallographic Communications 71, № 3 (2015): 309–11. http://dx.doi.org/10.1107/s2056989015003448.

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The five-coordinate CuIIatom in the title complex [CuCl2(C16H19N3)]·0.5C4H10O, adopts a near-ideal square-pyramidal geometry (τ-5 = 0.01). The apical Cu—Cl distance is 0.2626 (6) Å longer than the basal Cu—Cl distance. Weak C—H...Cl interactions between pyridine rings and the Cl atoms of adjacent complex molecules are present. The solvent molecule, located on a twofold rotation axis, is situated in the voids of this arrangement. Copper atoms coordinated by tridentate nitrogen-containing ligands have been found to be excellent promoters of Atom Transfer Radical Addition (ATRA) reactions.
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Mehandru, S. P., Alfred B. Anderson, and John C. Angus. "Hydrogen binding and diffusion in diamond." Journal of Materials Research 7, no. 3 (1992): 689–95. http://dx.doi.org/10.1557/jmr.1992.0689.

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We have investigated the binding and diffusion pathways for atomic hydrogen in diamond using the semiempirical atom superposition and electron delocalization molecular orbital (ASED-MO) theory. The bond-centered site has been found to be more stable than the tetrahedral and hexagonal interstitial sites due to the formation of a low-lying band-gap orbital which takes the promoted electron. A second hydrogen binds even more stably to the nearby antibonding site with additional stabilization of the now doubly occupied band gap orbital. The bond-centered hydrogen is predicted to migrate along the
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Luo, Zhibo, Zhijie Wang, Jia Li, Kang Yang, and Gang Zhou. "N-Promoted Ru1/TiO2 single-atom catalysts for photocatalytic water splitting for hydrogen production: a density functional theory study." Physical Chemistry Chemical Physics 22, no. 20 (2020): 11392–99. http://dx.doi.org/10.1039/d0cp00929f.

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In our Ru<sub>1</sub>–N<sub>1</sub>/TiO<sub>2</sub> single-atom catalyst system, isolated Ru<sub>1</sub> atoms act as active sites for the reduction of protons, and the TiO<sub>2</sub> support offers the photogenerated carriers, allowing for a hydrogen evolution activity comparable to that of Pd.
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Pellissier, Hélène. "The Use of Domino Reactions for the Synthesis of Chiral Rings." Synthesis 52, no. 24 (2020): 3837–54. http://dx.doi.org/10.1055/s-0040-1707905.

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This short review highlights the recent developments reported in the last four years on the asymmetric construction of chiral rings based on enantioselective domino reactions promoted by chiral metal catalysts.1 Introduction2 Formation of One Ring Containing One Nitrogen Atom3 Formation of One Ring Containing One Oxygen/Sulfur Atom4 Formation of One Ring Containing Several Heterocyclic Atoms5 Formation of One Carbon Ring6 Formation of Two Rings7 Conclusion
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Dissertations / Theses on the topic "Atome promoteur"

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Tonnerre, Jean-Marc. "Étude de la structure locale d'un catalyseur d'hydrodésulfuration Ni-Mo non supporté par la diffusion anomale des RX." Paris 11, 1989. http://www.theses.fr/1989PA112284.

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Ce mémoire est consacré à l'étude, par la diffusion anomale des RX, de la phase "NiMoS" de type MoS2 d'un catalyseur d'hydrodésulfuration Ni-Mo non supporté. L'activité catalytique de ces systèmes multiphasiques est reliée à la présence d'une phase NiMoS qui apparaît sous forme de petites cristallites présentant une structure de type MoS2. Afm de l'isoler, nous avons étudié un échantillon avec une faible concentration en Ni (7%). Au sein de cette phase, la position des atomes promoteurs Ni est le sujet de controverses. Pour certains auteurs, ils s'insèrent entre les feuillets S-Mo-S sur le bor
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Barker, Megan. "Structural Investigation of Processing α-Glucosidase I from Saccharomyces cerevisiae". Thesis, 2010. http://hdl.handle.net/1807/32660.

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N-glycosylation is the most common eukaryotic post-translational modification, impacting on protein stability, folding, and protein-protein interactions. More broadly, N-glycans play biological roles in reaction kinetics modulation, intracellular protein trafficking, and cell-cell communications. The machinery responsible for the initial stages of N-glycan assembly and processing is found on the membrane of the endoplasmic reticulum. Following N-glycan transfer to a nascent glycoprotein, the enzyme Processing α-Glucosidase I (GluI) catalyzes the selective removal of the terminal glucose re
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Book chapters on the topic "Atome promoteur"

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TOPSØE, H., N. Y. TOPSØE, O. SØRENSEN, et al. "The Role of Promoter Atoms in Cobalt-Molybdenum and Nickel-Molybdenum Catalysts." In Solid State Chemistry in Catalysis. American Chemical Society, 1985. http://dx.doi.org/10.1021/bk-1985-0279.ch014.

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Johnson, P. D., X. Pan, J. Tranquada, S. L. Hulbert, and E. Johnson. "Electron Stimulated Desorption of Excited Hydrogen Atoms from an Alkali Promoted Surface." In Desorption Induced by Electronic Transitions DIET III. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73728-2_9.

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Spitzner, D. "Zinc-Promoted Coupling." In Six-Membered Hetarenes with One Nitrogen or Phosphorus Atom. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-015-00421.

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Cordes, Eugene H. "Seduced by Drug Discovery." In Hallelujah Moments. Oxford University Press, 2014. http://dx.doi.org/10.1093/oso/9780199337149.003.0005.

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In autumn 1978, a gentleman scientist named Ralph Hirschmann changed my life. At the time, Ralph was a 56-year-old chemist who had just been promoted to senior vice-president for basic research in chemistry in the Merck Research Laboratories of Merck and Company, a large and—in the opinion of many—the best pharmaceutical house in the world at that time. Ralph had spent his entire professional career at Merck, starting in 1950, and he had a substantial list of scientific accomplishments to his credit. One of these stood out above all others: the laboratory synthesis of a really big molecule. The focal point of chemistry is the molecule. Linking together atoms of the elements hydrogen, oxygen, and carbon, for example, with chemical bonds (think electron glue) creates molecules. There are a lot of different molecules on planet Earth—perhaps a hundred million—some assembled by living organisms and others made in chemistry labs. Some are very small, just two or three atoms linked together. The principal components of our atmosphere—nitrogen and oxygen—are examples. Nitrogen gas consists of two nitrogen atoms (N) linked together: N2. Likewise, oxygen gas is composed of two oxygen atoms (O) linked together: O2. Water provides a slightly more complex example. Two hydrogen atoms (H) are linked to an oxygen atom, H-O-H, more commonly written as H2O. Others are really big and contain thousands of atoms. This is where Ralph comes in. The outstanding achievement for which Ralph gained fame in the arcane world of chemistry was the total laboratory synthesis of a protein—known as ribonuclease S—completed in 1969. A word of warning here: chemistry is full of long words such as ribonuclease that are difficult to spell, difficult to pronounce, and have meaning only to a chemist. There is nothing that I can do about that, so get used to it. Proteins are big molecules—thousands of atoms. The work that Ralph did was in collaboration with another chemist at Merck—Bob Denkewalter.
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Lok, С. Martin, D. Mervyn Shannon, and John L. Casci. "Imaging Promoter Atoms in Cobalt Fischer-Tropsch Catalysts Using SuperSTEM Microscopy." In Science and Technology in Catalysis 2006. Elsevier, 2007. http://dx.doi.org/10.1016/b978-0-444-53202-2.50053-1.

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Hamblin, Jacob Darwin. "Introduction." In The Wretched Atom. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197526903.003.0001.

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The Wretched Atom is the first historical study of efforts to promote nuclear technologies globally from the Second World War to the close of the twentieth century. It focuses on countries that seemed to live at the knife’s edge of human existence—those with subsistence economies or resource shortfalls, or where peoples routinely were threatened by famine, drought, and disease. The promise of civilian atomic energy was a formidable tool of state power in the late twentieth century because it took advantage of social aspirations, anxieties, and environmental vulnerabilities, especially in the developing world. The deployment of rhetoric to promote atomic energy was inseparable from geopolitics writ large and has rarely been entirely peaceful. Instead it has been embedded in stories of conventional warfare, racial and neocolonial divisiveness, struggles to assert control over the earth’s natural resources, and the abetting of nuclear weapons programs both old and new.
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Hamblin, Jacob Darwin. "Water, Blood, and the Nuclear Club." In The Wretched Atom. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197526903.003.0007.

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China’s Bomb set into a motion a series of events that resulted in the late 1960s in the signing of a non-proliferation treaty—an agreement that, by century’s end, would bind together nearly 200 participating governments. In their zeal to attract other countries into agreements about non-proliferation and safeguards, nuclear states—led by the United States—recommitted to the multiple promises of the peaceful atom. Two of the most politically volatile regions on earth, the Indian subcontinent and the Middle East, would see bloody conflict in the 1960s and beyond, at the same time that politicians promoted nuclear programs there under the banner of the peaceful atom. If non-nuclear nations agreed to forgo weapons development in exchange for access to the atom’s civilian applications, those applications needed to be perceived as valuable, even if based on a mirage.
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Mee, Nicholas. "The Book of Changes." In Celestial Tapestry. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198851950.003.0012.

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Leibniz promoted the idea of binary numbers as part of his programme to mechanize calculation. He argued that binary numerals originate in the Chinese divinatory system known as the I Ching. Mechanical combination is explored in the short story The Library of Babel by Jorge Luis Borges. The fictional library includes books containing all possible combinations of letters. The scale of the library can be understood by considering a sentence of just sixty characters. There are more sequences of sixty characters than there are atoms in the visible universe. Borges and his story formed part of the inspiration for Umberto Eco’s The Name of the Rose, which revolves around a secret library within a medieval monastery.
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Lourenço, Nuno, and Francisco Baptista Pereira. "PSO-CGO." In Natural Computing for Simulation and Knowledge Discovery. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4253-9.ch001.

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In this paper the authors present PSO-CGO, a novel particle swarm algorithm for cluster geometry optimization. The proposed approach combines a steady-state strategy to update solutions with a structural distance measure that helps to maintain population diversity. Also, it adopts a novel rule to update particles, which applies velocity only to a subset of the variables and is therefore able to promote limited modifications in the structure of atomic clusters. Results are promising, as PSO-CGO is able to discover all putative global optima for short-ranged Morse clusters between 30 and 50 atoms. A comprehensive analysis is presented and reveals that the proposed components are essential to enhance the search effectiveness of the PSO.
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Chapoutot, Johann. "Mens sana." In Greeks, Romans, Germans. University of California Press, 2016. http://dx.doi.org/10.1525/california/9780520275720.003.0004.

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This chapter details the National Socialist movement's educational reforms. Nazi anti-intellectualism, which rejected the pursuit of knowledge for its own sake, disdained abstract thought in favor of decisive action. In addition, modern individualism was cast aside in favor of a holistic view of man: not a fully autonomous, self-sufficient atom but an inseparable member of a group, without which the individual would wither and die. This two-pronged revolution was backed, with consummate political opportunism—and perhaps occasionally genuine conviction—by respected scholars of the ancient world, professors of classics and history, who sought to promote the study of antiquity as a paradigm of proper values for the youth of the new Germany. Their self-appointed mission in the new Reich was nothing less than to save the humanities.
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Conference papers on the topic "Atome promoteur"

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Lopes Filho, Wilson Roberto, Yago F. Lopes, Lilian T. F. de M. Camargo, and Ademir J. Camargo. "Dinâmica Molecular Ab Initio da Complexarão de Íons zinco com a vitamina C em Fase Gasosa." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol2020166.

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Zinc and vitamin C are essential micronutrients for the conservation of the human body, being essential for the maintenance of the immune system, reducing the risk, severity and duration of infectious diseases. They are taken together as a food supplement, resulting in the improvement of pneumonia and malaria infections. Vitamin C and zinc are also associated with measures of obesity and adiposity. Studies report that vitamin C complexed in zinc promotes adipogenesis and stimulates the generation of insulin-responsive adipocytes. Therefore, since vitamin C together with zinc are fundamental fo
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Feitelberg, Alan S., and Sanjay M. Correa. "The Role of Carbon Monoxide in NO2 Plume Formation." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-053.

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Through a series of computational studies, carbon monoxide has been identified as an important promoter of NO oxidation to NO2 in combustion turbine exhaust gas at intermediate temperatures (450 to 750°C). NO2 formation is accompanied by enhanced CO burnout at these temperatures. Perfectly stirred reactor and plug flow reactor calculations indicate that concentrations of CO as low as 50 ppmv in exhaust gas containing 25 ppmv NO can result in the conversion of 50% of the NO to NO2 in less than 1 second. NO2 concentrations as low as 15 ppmv can result in visible, yellow-brown plumes from large d
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Chai, Guocai, Ping Liu, and Johan Frodigh. "Influence of Temperature on the Strain Controlled Fatigue Behaviour of Alloy 690 Tube Material." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49262.

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Strain controlled fatigue tests for hot-extruded tube material of Alloy 690 (Sandvik Sanicro 69) have been performed at room temperature (RT) and at elevated temperature (204°C). The influences of temperature on the cyclic deformation behaviour and the fatigue life have been investigated. The influence of temperature on the fatigue life is relatively small in the temperature range investigated. However, the fatigue behaviour at elevated temperature is quite different from that at RT. A second cyclic strain hardening was observed at 204°C. The possible mechanisms have been investigated using tr
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Chen, Nannan, Hongliang Wang, Jingjing Li, Vic Liu, and James Schroth. "Evolution of Interfacial Microstructure During Resistance Spot Welding of Cu and Al With Ni-P Coating." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-60759.

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Abstract Dissimilar materials of copper (Cu) to aluminum (Al) with nickel-phosphorus (Ni-P) coatings were joined using resistance spot welding. The Ni-P coatings were electroless plated on the Al surfaces to eliminate the formation of brittle Cu-Al intermetallic compounds (IMCs) at the faying interface between Cu and Al. Three welding schedules with various heat input were employed to produce different interfacial microstructure. The evolution of interfaces in terms of phase constitution, elemental distribution and defects (gaps and voids) was characterized and the formation mechanisms were el
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Al-Kharusi, Moosa S. M., Tasneem Pervez, and Khalid Alz-Zebdeh. "Effect of Chirality and Geometry on the Young’s Modulus of Graphene Structure Using Spring Based Finite Element Approach." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37972.

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The development of nanocomposite materials has led to vast progress in the field of composite materials as well as in finding new solutions to technological problem that have not been solved yet. Among the newly developed materials, the most attracting is the graphene based nanocomposites that has superior mechanical, thermal, optical and electrical properties. The hexagonal structure and the high strength of carbon–carbon bond in graphene yield strong material. Estimation of mechanical properties of the graphene becomes one of the important issues, which should be reasonably and accurately pr
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Vereshchagin, K. A., S. Yu Volkov, V. D. Kobtsev, et al. "COHERENT ANTI-STOKES RAMAN SCATTERING AND FLUORESCENT STUDY OF IGNITION AND COMBUSTION OF H2/O2 MIXTURES UPON PHOTODISSOCIATION OF O2 MOLECULES." In 8TH INTERNATIONAL SYMPOSIUM ON NONEQUILIBRIUM PROCESSES, PLASMA, COMBUSTION, AND ATMOSPHERIC PHENOMENA. TORUS PRESS, 2020. http://dx.doi.org/10.30826/nepcap2018-2-04.

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The low-temperature ignition of H2/O2 mixture promoted by resonant laser radiation leading to the photodissociation of O2 molecules was studied experimentally. The experimental test bench involving the model combustion chamber, coherent anti-Stokes Raman scattering (CARS) and fluorescent diagnostic techniques was created for the experimental investigation of mixture ignition and combustion at conditions typical for gas turbine engines. For the production of chemically active oxygen atoms which initiate ignition in the H2/O2 mixture, the pulsed excimer ArF-laser emitting at a wavelength of 193
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Wei, T. G., C. S. Long, B. F. Luan, Z. Miao, W. Wang, and L. Chen. "Microstructure and Performance of Zr-1.0Cr-0.4Fe-xMo Alloys." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-15920.

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For the possibility to develop Zr-based alloys with good corrosion resistance and relatively high strength as well at elevated temperature, Zr-1.0Cr-0.4Fe-xMo (x = 0, 0.2, 0.4, 0.6) alloys with different Mo addition were studied. These alloys were prepared by vacuum arc melting, the microstructure, phase transformation, tensile strength, corrosion resistance and hydrogen uptake during corrosion of these alloys was studied and the effect of Mo addition was discussed. Mo addition had a refinement effect on the microstructure, the α-laths size of the alloys in as-cast condition was decreased by M
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Gokulakrishnan, Ponnuthurai, Casey C. Fuller, and Michael S. Klassen. "Experimental and Modeling Study of C1 to C3 Hydrocarbon Ignition in the Presence of Nitric Oxide." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-65001.

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Nitric oxide produced during combustion will be present in vitiated air used in many devices with exhaust gas recirculation. An experimental and modeling investigation of the effect of nitric oxide on the ignition of C1 to C3 hydrocarbon fuels, namely, CH4, C2H4, C2H6 and C3H6, is presented. These molecules are important intermediate species generated during the decomposition of long-chain hydrocarbon fuel components typically present in jet fuels. Moreover, CH4 and C2H6 are major components of natural gas fuels. Although the interaction between NOx and CH4 has been studied extensively, limite
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Dawson, Gaynor, and Tom McKeon. "Green Remediation: Enhanced Reductive Dechlorination Using Recycled Rinsewater as Bioremediation Substrate." In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7090.

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Enhanced reductive dechlorination (ERD) has rapidly become a remedy of choice for use on chlorinated solvent contamination when site conditions allow. With this approach, solutions of an organic substrate are injected into the affected aquifer to stimulate biological growth and the resultant production of reducing conditions in the target zone. Under the reducing conditions, hydrogen is produced and ultimately replaces chlorine atoms on the contaminant molecule causing sequential dechlorination. Under suitable conditions the process continues until the parent hydrocarbon precursor is produced,
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