Carbides preparation

Germanes hydride, 2 76 reactivity of, 2 87 Germanium anionic cluster, 24 227 azides, preparation, 9 138 properties, 9 135-136, 139, 141 binary carbide not reported, 11 211 carbides, preparation of, 11 163 chalcogenide halides, 23 390 chlorides, mass spectra of, 18 248, 249 complexes, xenon fluoride reactions, 46 85 compounds, see also Organogermanium compounds... 

The selectivity of alcohol depends on the carbide preparation. A maximum in alcohol is achieved for the sample WC/Ti02 (T3) for which the preparation of the carbide combines reduction and carburization steps at moderate temperatures (respectively, 873 K and 1073 K). In this case, anionic vacancies stabilized by mixed oxides are formed, associated with carbon vacancies in mixed carbides resulting in a better interaction of carbidic and oxidic phases. On silica, ceria and zirconia, the extent of carburization is too high and the interaction of the carbide phase with the oxide support is suppressed giving larger isolated particles of tungsten carbide with low dispersion. 

Peters, J. C., Odom, A. L., Cummins, C. C., A terminal molybdenum carbide prepared by methylidyne deprotonation. Chem. Commun. 1997, 1995-1996. 

Similarly, Union Carbide prepares tetraglycidyl ether from such an amine [108]. 

Except for the fullerenes (see later), carbon atoms seldom coordinate a metal atom a well-characterized example of a naked carbon atom is a molybdenum carbide prepared, in a multistep procedure, by removing a terminal proton from a corresponding methylidyne species ... 

Trisilane. Trisilicopropane trisilicon octahydride silicopropane trisilicane. HtSi9 mol wt 92.33. H 8.73%, Si 91.27%. SijHj. Obtained by separation of mixed silanes prepared from magnesium silicide and hydrochloric acid Stock. Somlesky. Ber. 49, 111 (1916) 54B, 524 (1921) S6B, 247 (1923) Culbertson. UA pat. 2,551,571 (1951 to Union Carbide) prepared by conversion of silane to higher silanes in an ozonizer type of electric discharge Spanier, MacDiar-mid, In org. Chem. 1, 432 (1962). 

P. Tsui, K. E. Spear, in Emergent Process Methods for High-Technology Ceramics Morphological Study of Silicon Carbide Prepared by Chemical Vapor Deposition, (Eds. by R. F. Davis, H. Palmour, HI, and R. L. Porter), Materials Research 17, 1984, pp. 371-380. 

POROUS SILICON CARBIDE PREPARED BY PYROLYSIS OF THE ORGANOSILICON POLYMER... 

Carbides Prepared from Argon Fluidization of Metal... 

In initial experiments to prepare early transition metal carbides with MAFBS, argon gas fluidized mixtures of metal and carbon black powders. The extent of reaction in these experiments was limited by the number of high-temperature collisions between the two types of powders. Nonetheless, the results of these experiments are instructive in the development of this preparation technique. The catalytic activity of carbides prepared with this method was not assessed. 

Carbides Prepared from Ethylene Fluidization of Metal Powders... 

Physical processes may also be used to deposit Pt onto various types of supports. An example of this type of approach is the preparation of Pt-metal monolayers supported on low-cost transition metal carbides, prepared by magnetron sputtering of Pt onto thin films of W and Mo carbides. While Pt monolayers were achieved on the thin-film electrode geometry used in this study, uniform deposition of Pt onto high surface area particulate materials or mesoporous structures by these methods remains challenging [48]. 

Choi J-S, Krafft J-M, Krzton A, Djega-Mariadassou G (2002) Study of residual oxygen species over molybdenum carbide prepared during in situ DRIFTS experiments. Catal Lett 81 (3) 175-180. doi 10.1023/a 1016568804706... 

RT Yakimova, AA Kalnin. Study of the silicon carbide preparation in the silicon-scandium-caibon system. Phys Status SoUdi (a) 32 297, 1975. 

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