نتایج جستجو برای: nonaqueous solvent
تعداد نتایج: 56507 فیلتر نتایج به سال:
Abstract Nonaqueous sodium- and lithium-oxygen batteries are of interest because their high theoretical specific energies relative to state-of-the-art Li-ion batteries. However, several challenges limit rechargeability, including instability the carbon electrode electrolyte with reactive oxygen species formed during cycling. This work investigates strategies improve cycling efficiency Na–O 2 sy...
Operation of the nonaqueous Li-O2 battery critically relies on the reversible oxygen reduction/evolution reactions in the porous cathode. Carbon and polymeric binder, widely used for the construction of Li-O2 cathode, have recently been shown to decompose in the O2 environment and thus cannot sustain the desired battery reactions. Identifying stable cathode materials is thus a major current cha...
kinetic parameters of the ammonolysis reaction of dichloroethane in nonaqueous media are studied and the optimum reaction conditions are reported. a suitable reactor for running the reaction under high pressure in the range of 50 to 500 °c is designed. kinetic behaviours of the system is studied and other reaction parameters such as rate constant, kinetic order, and activation energy are determ...
The proteins and azoproteins of liver nuclei isolated in aque ous or nonaqueous medium from livers of rats fed the hepato carcinogen 3'-methyl-4-dimethylaminoazobenzene for 20 days were compared. The two types of nuclear preparation ap parently contained similar quantities of saline-soluble and-insoluble protein-bound azo dyes. in aqueous nuclei, the pro tein-bound dyes represent only 3% of tho...
در این تحقیق ثابت های تشکیل (kf) و توابع ترمودینامیکی ( s,h) واکنش کمپلکس شدن برخی از یون های نیترات فلزات واسطه ( co2+,cd2+pb2+,ni2+,cu2+,zn2+,la2+) با لیگاند دی آزا-18-کراوان -6 (da18c6 ) و کریپتوفیکس 5( kryptofix5) در حلال های غیر آبی و مخلوط در دماهای مختلف با استفاده از روش هدایت سنجی و nmr بررسی شد. واکنش کمپلکس شدن نیترات این فلزات با لیگاند دی آزا-18 –کراوان -6 در حلال های استونیتریل (...
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