نتایج جستجو برای: mo decomposition

تعداد نتایج: 129761  

Journal: :Dalton transactions 2010
Pavel A Dub Oleg A Filippov Natalia V Belkova Jean-Claude Daran Lina M Epstein Rinaldo Poli Elena S Shubina

The interaction of the carbonyl hydride complex Cp*Mo(PMe(3))(2)(CO)H with Brønsted (fluorinated alcohols, (CF(3))(n)CH(3-n)OH (n = 1-3), and CF(3)COOH) and Lewis (Hg(C(6)F(5))(2), BF(3).OEt(2)) acids was studied by variable temperature IR and NMR ((1)H, (31)P, (13)C) spectroscopies in combination with DFT/B3LYP calculations. Among the two functionalities potentially capable of the interaction ...

Journal: :Ecology letters 2008
Michael Kaspari Milton N Garcia Kyle E Harms Mirna Santana S Joseph Wright Joseph B Yavitt

To explore the importance of 12 elements in litter production and decomposition, we fertilized 36 1600 m(2)-plots with combinations of N, P, K, or micronutrients (i.e. B, Ca, Cu, Fe, Mg, Mn, Mo, S, Zn) for 6 years in a lowland Panamanian forest. The 90% of litter falling as leaves and twigs failed to increase with fertilization, but reproductive litter (fruits and flowers) increased by 43% with...

2014
Daeun Kim Joong Hee Kim Justin P. Haldar

Fig. 2. Decomposed component images from rat cervical spinal cord data. (top) Control animal. (bottom) Injured animal. Automatic Tissue Decomposition using Nonnegative Matrix Factorization for Noisy MR Magnitude Images Daeun Kim, Joong Hee Kim, and Justin P. Haldar Department of Electrical Engineering, University of Southern California, Los Angeles, CA, United States, Department of Neurology, W...

Journal: :Chemical communications 2003
S C Lyu T J Lee C W Yang C J Lee

We report the synthesis of high-quality double-walled carbon nanotubes without defects by catalytic decomposition of alcohol over an Fe-Mo/Al2O3 catalyst; the synthesized DWNTs have outer diameters in the range of 1.52-3.54 nm and an average interlayer distance of 0.38 nm between graphene layers.

2005
Y. Wang F. Gao W. T. Tysoe

The reaction of Mo(CO)6 with thin films of dehydroxylated alumina grown on a Mo(1 0 0) substrate above 500 K is studied in ultrahigh vacuum using temperature-programmed desorption and Auger and X-ray photoelectron spectroscopies. This results in the formation of a molybdenum carbide that incorporates a small amount of oxygen, where MoC is formed initially, becoming closer to Mo2C as the Mo(CO)6...

2003
Y. Wang F. Gao M. Kaltchev W. T. Tysoe

The interaction of incident electron beams with molybdenum hexacarbonyl (Mo(CO)6) adsorbed on thin, dehydroxylated alumina films grown on a molybdenum substrate is studied in ultrahigh vacuum using primarily temperature-programmed desorption (TPD) and reflection– absorption infrared spectroscopies (RAIRS). It is found that electron beams induce decarbonylation, forming both subcarbonyls and a s...

Journal: :The journal of physical chemistry. B 2006
Jun Zhou Shaozhi Deng Li Gong Yong Ding Jian Chen Jianxing Huang Jun Chen Ningsheng Xu Zhong Lin Wang

Large-area aligned Mo nanowires have been grown on stainless steel substrates by high-temperature chemical vapor deposition with the use of Mo metal. The detailed physical and chemical growth processes regarding the formation of the nanowires have been investigated using mass spectroscopy, thermogravimetry, and differential scanning calorimetry analysis, as well as structure analysis by electro...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان 1390

مواد نانو کامپوزیت به خاطر ریز دانه بودن و وجود فصل مشترک فوق العاده زیاد، دارای کسر زیادی از اتم ها در مرزدانه ها بوده، به طوری که خواص قابل توجهی را در مقایسه با سایر مواد از خود بروز می دهند. فرآیند های مختلفی همچون ذوب و ریخته گری و یا انجماد سریع و فرآیندهای مکانوشیمیایی برای تولید نانوکامپوزیت ها وجود دارند. قابلیت های منحصر به فرد روش مکانوشیمیایی مانند؛ انجام واکنش ها در حالت جامد، تهیه...

2016
Steffen Säubert Rainer Jungwirth Tobias Zweifel Michael Hofmann Markus Hoelzel Winfried Petry

Exposing uranium-molybdenum alloys (UMo) retained in the γ phase to elevated temperatures leads to transformation reactions during which the γ-UMo phase decomposes into the thermal equilibrium phases, i.e. U2Mo and α-U. Since α-U is not suitable for a nuclear fuel exposed to high burn-up, it is necessary to retain the γ-UMo phase during the production process of the fuel elements for modern hig...

2012
G. N. Schrauzer Laura A. Hughes

Colorless alkylmolybdates(VI) of composition R-M0O3are generated in aqueous solutions by the alkaline hydrolysis of complexes R-Mo(Bpy)(0)aBr (Bpy = 2,2'-bipyridyl, R = CH3 and higher alkyl). At room temperature in alkaline aqueous solution, the new organometallic derivatives of oxomolybdate(VI) are remarkably resistant against Mo-C bond hydrolysis. Decomposition occurs more rapidly on heating,...

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