Results 151 to 160 of about 35,854 (188)

The crystallization process of a−Fe35Ni15B26 ultrafine particles produced by reduction with borohydride

Hyperfine Interactions, 1992
The crystallization process of a−Fe35Ni15B26 ultrafine alloy particles prepared by chemical reduction with borohydride was investigated mainly by Mossbauer spectroscopy. The experimental results exhibit some new characteristics which were attributed to the microstructure of the sample.
Zheng HU, Jianyi Shen, Lifeng Zhang, Yi Chen, Yuanfu Hsia   +4 more
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Preparation and properties of magnetic metal powders obtained by a borohydride reduction process

Journal of Magnetism and Magnetic Materials, 1990
Abstract Experimental data are presented on pairs of magnetic metal powders with different compositions and magnetic properties obtained by a borohydride method in the presence (type I powders) and absence (type M powders) of a magnetic field. The density of the chains is found to be 0.957 (equal to that of Kondorskii) for type I and 0.743 (the value
Iovka Dragieva, Mina Slavcheva, Dimiter Buchkov, Dimiter Mehandjiev   +3 more
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ChemInform Abstract: SODIUM BOROHYDRIDE REDUCTION OF COBALOXIME COMPLEXES. AN ELECTRON‐TRANSFER, FREE‐RADICAL PROCESS

Chemischer Informationsdienst, 1985
AbstractDie Reduktion von Allenyl‐ und Propargylcobaloxim‐ komplexen kann in Gegenwart von zugesetzten Basen erfolgen, da diese die Weiterreduktion von anfänglich gebildeten Produkten wie Allen oder Alkin durch Hydrocobaltierung unterdrücken.
D. J. PASTO, D. A. TIMMERS, N.‐Z. HUANG   +2 more
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A Mössbauer study of hydrogen in powders obtained by a borohydride reduction process

AIP Conference Proceedings, 1991
The amorphous powders obtained by a borohydride reduction process are investigated by Mossbauer spectroscopy. It is established that hydrogen included in globules and in the interglobular space reduces ions Fe3+ to Fe2+ and to α‐Fe and causes a solid state phase chemical transition process in a crystallization.
S. Nikolov, I. Dragieva, D. Buchkov
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Study of the interglobular structure of metal powders obtained by a borohydride reduction process

Journal of Magnetism and Magnetic Materials, 1985
Abstract The effect of borohydride reduction duration and magnetic field in the specific surface area, metal particle size and form, and form and dimensions of the textural arrangement of pores in metal powders is investigated. It is established that the particle chains formed involve interglobular voids, i.e.
Dimiter Mehandjiev, Iovka Dragieva, Mina Slavcheva   +2 more
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Complex formation in solutions for chemical synthesis of nanoscaled particles prepared by borohydride reduction process

Nanostructured Materials, 1999
Abstract Complex forming agents are often used in chemical synthesis of nanoscale particles by means of a borohydride reduction process. Their influence on the rate of nucleation and a growth of particles without oxide/hydroxides shell are estimated earlier. In this paper experimental data are presented about the synthesis of Fe-Nd-B-H particles from
I. Dragieva, S. Stoeva, P. Stoimenov, E. Pavlikianov, K. Klabunde   +4 more
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Methanol oxidation in acidic and alkaline electrolytes using PtRuIn/C electrocatalysts prepared by borohydride reduction process

Journal of Fuel Chemistry and Technology, 2018
Abstract PtRuIn/C electrocatalysts (20% metal loading by weight) were prepared by sodium borohydride reduction process using H2PtCl6(6H2O, RuCl3(xH2O and InCl3(xH2O as metal sources, borohydride as reducing agent and Carbon Vulcan XC72 as support.
M.C.L. Santos, J. Nandenha, J.M.S. Ayoub, M.H.M.T. Assumpção, A.O. Neto   +4 more
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Optimal extractive and reductive desulfurization process using sodium borohydride in situ generated via sodium metaborate electroreduction in ionic liquid

Chemical Engineering and Processing - Process Intensification, 2020
Abstract In order to lower desulfurization cost, the NaBH4 preparation via NaBO2 electroreduction was introduced into the integrated process of extraction and reductive desulfurization. Accordingly, a novel desulfurization method was developed where NaBH4 can be recycled at the same time as desulfurization.
Chenhua Shu, Faying Lai, Feng Zhu, Dan Luo   +3 more
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Preparation of PdAu/C-Sb2O5·SnO2 electrocatalysts by borohydride reduction process for direct formic acid fuel cell

Ionics, 2013
Pd/C-Sb2O5·SnO2 and PdAu/C-Sb2O5·SnO2 electrocatalysts with different PdAu atomic ratio (90:10, 70:30, and 50:50) were prepared by borohydride reduction method, and characterized by X-ray diffraction, transmission electron microscopy, cyclic voltammetry, chronoamperommetry, and performance test on direct formic acid fuel cell at 100 °C.
J. Nandenha, R. F. B. De Souza, M. H. M. T. Assumpção, E. V. Spinacé, A. O. Neto   +4 more
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A novel process for gasoline desulfurization based on extraction with ionic liquids and reduction by sodium borohydride

Fuel, 2014
A novel integrated process of extraction with ionic liquid (IL) and reductive desulfurization by sodium borohydride (NaBH4) was presented for gasoline desulfurization. The factors that influenced desulfurization efficiency were investigated and desulfurization efficiency reached more than 97% for model gasoline and more than 93% for real gasoline.
Chenhua Shu, Tonghua Sun, Hongbo Zhang, Jinping Jia, Ziyang Lou   +4 more
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