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Showing 1 to 20 of 44 for “"NaBH4"”.
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Reductions by Cobalt-Catalyzed Production of Hydrogen Gas from NaBH4 in a Two-Chamber System
<p>The work outlined in this thesis describes a bench-scale methodology involving a <em>two-chamber system </em>for conducting catalytic hydrogenation reactions by obtaining hydrogen (H<sub>2</sub>) gas from stable sodium borohydride (NaBH<sub>4</sub>). Whereas NaBH<sub>4</sub> is widely used for a …
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Vapor Phase Batch Hydrolysis of NaBH<sub>4</sub> At Elevated Temperature and Pressure
… technological challenges of storing hydrogen. NaBH4 was the primary focus of this work because it had a lower cost and better stability than other complex chemical hydrides. NaBH4 reacted with water vapor to generate hydrogen and sodium metaborate according to the hydrolysis reaction shown in …
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Developing Core-Shell Borohydride Nanoarchitectures and Understanding their Structure-Hydrogen Release/Uptake Relationships
… (i) understand the paths to synthesise various NaBH4 nanoarchitectures (e.g. spheres, cubes, or bars) and potential nanostructure/H2 property interdependencies, (ii) rationalise the fabrication of core-shell NaBH4@Ni using wet-chemistry approaches to confine NaBH4 for reversible H2 storage, …
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Increasing fuel cell run time by preventing precipitation of reactants or products in direct sodium borohydride fuel cell
… direct sodium borohydride / hydrogen peroxide (NaBH4 / H2O2 ) proton exchange membrane fuel cell, given a fixed volume of fuel solution . In the fuel cell being developed here at the University of Illinois, there is a need to manage water flow so as to avoid reaching solubility limits of …
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The Formation of Metal Nanoparticle-Carbon Nanotube Composite Materials for the Non-enzymatic Detection of Glucose
… These composites were named fMWCNT-Aunano(NaBH4) and fMWCNT-Aunano(TriSodCit). AuNPs of a face-centred cubic structure were successfully formed on the sidewalls of the fMWCNTs. The fMWCNT-Aunano(NaBH4) composite had an Au loading of 2.0% wt. and contained AuNPs with a mode diameter of 7.5 …
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Development of metallic catalysts for hydrogen production from metal hydrides
… in celle a combustibile. In particolare, NaBH4 rappresenta l'idruro migliore a causa della sua elevata capacità di stoccaggio di idrogeno (10,8% in peso). Inoltre, il sodio boroidruro non è infiammabile e non è tossico. I sottoprodotti della reazione di idrolisi sono ecologici e possono …
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Synthesis and Characterization of Organometallic Compounds for Materials
… of the adduct PH3·BH3 with excess NaBH4 in THF afforded a white powder, Na(BH3PH2BH 3). Reactions of Na(BH3PH2BH3) and Li(BH3PPh2BH3)·diox with several metal halides were described.
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Experimental and Theoretical Study of Hypergolic Solid Fuel Ignition and Combustion with Hydrogen Peroxide
… of hypergolic additives: sodium borohydride (NaBH4) as the reactive additive and manganese acetate tetrahydrate (Mn acetate) as the catalytic additive. A combination of experimental investigations and theoretical studies were conducted to investigate the heterogeneous ignition and combustion …
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Síntesis y Caracterización de Complejos de Paladio (II) con Ligandos (2-difenilfosfanil-benciliden)-anilina : Investigación y Desarrollo de un Sistema para Almacenamiento de Hidrógeno
… un vehículo, a partir de disoluciones acuosas de NaBH4, el cual es un método seguro para la liberación de hidrógeno de manera controlable, y una alternativa en el uso de sistemas de almacenamiento sólido. _____________________ In the first part of this Doctoral Thesis, complexes of palladium (II) …
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Hydrogen Gas Production and Effects During Remediation Using Nano-scale Zero-valent Iron
… the H2 gas produced by the self- hydrolysis of NaBH4 solution injected into saturated sands, despite using similar NaBH4 concentration as excess for nZVI synthesis. In the large-scale experiment, the exsolved H2 gas volume was sufficient to produce trapped gas in the injection area, and gas that …
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Self-Assembly, Spatial-, and Size- Control of Gold Nanoparticle/Block Copolymer Conjugates
… of AuNP by reduction of a metal salt with NaBH4. The optical properties of these S4VP/AuNP nanocomposites were thoroughly studied.
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Nanocomposite-graphene based platform for heavy metal detection
… and reducing graphene oxide to graphene by using NaBH4. Graphene was then characterized using FT-IR, TEM, AFM, XRD, Raman spectroscopy and solid state NMR. Nafion-Graphene in combination with a mercury film electrode, bismuth film electrode and antimony film electrode was used as a sensing …
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Síntesis, reactividad, estructura y propiedades de compuestos de metales del grupo del platino con enlaces M-N amido, amino e imino. ataques nucleofílicos sobre iminas coordinadas a paladio
… de paladio(II) con ligandos imina frente a NaBH4. Observándose la formación de especies amiduro y especies amina coordinadas al metal. No obstante, la formación de paladio metálico (por reducción con borohidruro de sodio) es importante en muchos de los casos.. En la segunda parte de este …
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ΣΥΝΘΕΣΗ ΚΑΙ ΒΙΟΛΟΓΙΚΗ ΜΕΛΕΤΗ ΤΩΝ ΠΑΡΑΓΩΓΩΝ ΤΟΥ 1,8-ΔΙΑΜΙΝΟ-3,6-ΔΙΘΕΙΑ- ΟΚΤΑΝΙΟΥ ΕΠΙΣΗΜΑΣΜΕΝΩΝ ΜΕ ΤΕΧΝΗΤΙΟ-99Μ
… MEDIA WITH TC-99M AFTER ITS REDUCTION WITH NABH4. THEN THE LABELLED COMPOUNDS WERE ANALYZED BY HPLC IN ONE OR MORE 99M TC-SPECIES. THESE WERE FURTHER STUDIED BY ELECTROPHORESIS (CHARGE, IN VITRO STABILITY) AND THEIR LIPOPHILICITY DETERMINED. THEY WERE FOUND TO BE IN STABLE, NEUTRAL IN BLOOD …
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TOWARD UNDERSTANDING THE FUNDAMENTALS IN THE SYNTHESIS OF METAL NANOCLUSTERS
… with Au(III) salt, followed by the addition of NaBH4 reducing agent. Although this method is widely applied in the synthesis of Au NCs, its understanding lacks behind, with most understanding based on the available knowledge related to Au NP synthesis. In this doctoral thesis, we attempt to …
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Optimization and Purification of Cadmium Sulfide Quantum Dots Biosynthesized by the Fungus Fusarium Oxysporum
… with the addition of 15 mM of 3-MPA and 25 mM of NaBH4. Synthesis of quantum dots reached a maximum after approximately 5 days of reaction time (120 h). Investigations into the secondary stress metabolism of F.oxysporum suggest that triggering this pathway leads to a higher output of CdS quantum …
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Flow injection analysis (FIA) determination of lead by hydride generation in banded coral skeletons /
… used along with sodium tetrahydroborate(III) (NaBH4) to produce plumbane (PbH4) in an acid medium. The design of a gas-liquid separator (hydride generator) was tested and the parameters of the flow injection system were optimized to achieve a good detection limit and sample throughput. The …
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The use of chiral auxiliaries in the synthesis of chemically and biologically important chiral compunds
… using the Fukuyama protocol followed by NaBH4 to afford α,α'-disubstituted-2-hydroxy synthons in 55-65% yield over two steps respectively. In part 2, carried out in the Chemistry Department at the University of Michigan, the macrolide core (10) of lactimidomycin was synthesised for …
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Encapsulation of metal hydride nanoparticles
… the encapsulation of sodium borohydride (NaBH4) nanoparticles. In addition, this technology could be considered for the storage of other air/moisture sensitive materials.
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Geležies dalelių sintezė vandens ir alyvos terpėse ir jų taikymas tribosistemose /
… chemistry terms: by electrochemical aspects of NaBH4 and LiBEt3H, used surfactants steric stabilization factor. The transmetallization of Fe by copper was investigated as well. Cementation of Fe occurs as long as copper ions are present in the solution. The used surfactants for iron particles …
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