نتایج جستجو برای: sodium borohydride

تعداد نتایج: 188203  

Journal: :Journal of hazardous materials 2007
N O Gonzales M E Levin L W Zimmerman

The reactivity of sodium borohydride in the presence of other species has been examined by adiabatic calorimetry. In combination with water, sodium borohydride exhibits an exotherm at room temperature accompanied by generation of gas (presumed to be hydrogen). Addition of potassium hydroxide to a sodium borohydride-water mixture is found to stabilize the solution and require a higher temperatur...

1979
M. M. Cook

Sodium borohydride treatment systems for control of heavy metal discharge offer several advantages to the photographic industry. Chemical reduction with sodium borohydride is rapid and results in low residual metal content; in addition, the reduced metals can be recovered with minimum expense. Sodium borohydride reduction is now being used to recover high purity silver from spent fixers more co...

Journal: :Journal of Synthetic Organic Chemistry, Japan 1982

Journal: :Physical chemistry chemical physics : PCCP 2011
Andrew M Duffin Alice H England Craig P Schwartz Janel S Uejio Gregory C Dallinger Orion Shih David Prendergast Richard J Saykally

Borohydride salts have been considered as good prospects for transportable hydrogen storage materials, with molecular hydrogen released via hydrolysis. We examine details of the hydration of sodium borohydride by the combination of X-ray absorption spectroscopy and first principles' theory. Compared to solid sodium borohydride, the aqueous sample exhibits an uncharacteristically narrow absorpti...

Journal: :Chemical communications 2012
Kamalraj V Rajendran Declan G Gilheany

A variety of phosphine oxides and sulfides can be efficiently converted directly to the corresponding phosphine boranes using oxalyl chloride followed by sodium borohydride. Optically active P-stereogenic phosphine oxides can be converted stereospecifically to phosphine boranes with inversion of configuration by treatment with Meerwein's salt followed by sodium borohydride.

Journal: :international journal of nano dimension 0
n. v. suramwar nanotechnology lab, department of chemistry, science college, congress nagar, nagpur, maharashtra, 440012, india. s. r. thakare nanotechnology lab, department of chemistry, science college, congress nagar, nagpur, maharashtra, 440012, india. n. t. khaty department of applied chemistry, priyadarshini college of engg. & tech., hingna, nagpur, maharashtra 440019, india.

well faceted cuo nanoparticles, were synthesized by thermal-assisted dissociation method at reflux temperature in a short period of time. a possible mechanism for synthesis of such highly pure and stable nanoparticles is tentatively proposed by ft-ir study. the large surface area and rich exposed active sites are expected to endow such nanoparticles with excellent performances in catalysis as d...

Journal: :iranian journal of catalysis 2012
arash shokrolahi abbas zali hamid reza pouretedal

the hydrolysis of sodium borohydride as a source of hydrogen gas is studied at different mole ratios of h+ to nabh4. the sulfonated porous carbon (spc) is used as a source of hydrogen ion and catalyst. it is found that the sulfonated porous carbon exhibits high activity for the hydrolysis of nabh4 to generate hydrogen gas at room temperature in comparison to amberlyst-15 and nafion-nr50. the ki...

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