M oxynitrides

Brinker C.J., Haaland D.M. Oxynitride glass formation from gels. J. Am. Ceram. Soc. 1983a 66 ... 

Four mmoles of malononitrile and benzaldehyde were introduced in a batch stirred tank reactor at 323 K with toluene as solvent (30 ml). Then 0.05 g of aluminophosphate oxynitride was added. Samples were analysed by gas chromatography (Intersmat Delsi DI200) using a capillary column (CPSilSCB-25 m). Care was taken to avoid mass or heat transfer limitations. Before the reaction no specific catalyst pretreatment was done. 

The oxynitride "AlPON" used as support was synthesised as the others. It is well represented by the AlPO3.i6N0.56 formula, its nitrogen content being 6.7 wt.%. This sample has a surface area of 310 m. g-l. 

Hitoki, G., Takata, T., Kondo, J.N., Hara, M., Kobayashi, H., and Domen, K., An oxynitride, TaON, as an efficient water oxidation photocatalyst under visible light irradiation (A = <500), Chem. Commun., 16,1698,2002. 

Similarly, other families of metallophosphates oxynitrides have been studied with catalytic objectives in different M-P-O-N systems (M = Ga, AlGa, AlCr, In, Ti, Zr,. ..) (235). 

S. Asti, A.M. Gu, E. Scheid, and J.P. Guidemt. Design of a low power SnOa gas sensor integrated on silicon oxynitride membrane Sensors and Actuators B67 (2000), 84-88. 

Melloni, A., Costa, R., Monguzzi, P., and Martinelli, M., 2003, Ring-resonator filters in silicon oxynitride technology for dense wavelength-division multiplexing systems. Opt. Leu. 28(17) 1567-1569. 

Generally, metal nitride and oxynitride catalysts have been prepared by the temperature programmed ammonolysis method. This technique was originally applied by Volpe and Boudart to M0O3 precursors to produce y-Mo2N which was pseudomOrphic with the precursor, with surface areas up to 225 m g The resultant surface area of materials is known to be a strong function of the synthesis parameters as demonstrated in Table 1. ... 

Results of the activity for heteroatom removal of nanoscale 8%Mo/ Fe203/S042, Mo2N Oy and Mo2CxOy are shown in Figure 27.6. They are expressed as the fraction of heteroatom removed (S, O, N), or the fraction of hydrogen consumed to obtain complete hydrogenation, as a function of reaction time. Table 27.3 summarizes the results for the activity of the nanoscale catalysts with the activity expressed as an areal rate (rate m-2), and also as a turnover rate for the oxycarbide and oxynitride. 

Shen Z, Nygren M (2000) Nd-Doped a-Sialon and Related Phases Stability and Compatibility. In Hampshire S, Pomeroy MJ (eds) Nitrides and Oxynitrides. Trans Tech Publications Ltd, Switzerland, p 191... 

Hampshire, S. (1993), Oxynitride glasses and glass-ceramics , in Chen I.W., Becher, P.F., Mitomo, M., Petzow, G., Yen, T-S. (eds), Silicon Nitride Ceramics - Scientific and Technological Advances, Mater. Res. Soc. Symp. Proc., 287, 93-100. 

Hampshire, S., Pomeroy, M.J. (2004), Effect of composition on viscosities of rare earth oxynitride glasses , J. Non-Cryst. Sol., 344, 1-7. 

Leng-Ward, G., Lewis, M.H. (1990), Oxynitride glasses and their glass-ceramic derivatives , in Lewis, M.H. (ed.), Glasses and Glass-ceramics, London, Chapman Hall. 

Thompson, D.P. (1992), Oxynitride glasses , in Cable, M. and Parker, J.M. (eds) High Performance Glasses, Glasgow, Blackie and Sons, Chapter 5. 

Koster, T.P.M., Spee, C.I.M.A., De Kreuk, C.W. and Mackor, A. 1987. The stabilization of silicon photoelectrodes by a silicon oxynitride coating. Extended abstracts, 38th Meeting International Society of Electro-chemistry, Maastricht, September 13-18,1987. Vol. II, Abstr. 6.73. Pp.659-661. 

Table 4.1.1 Illustration of the derivation of the elementary steps. Step 1 Adsorption of NH3 on catalyst surface step 2 first release of H2 step 3 N2-formation of one N atom from catalyst and one from former NH3 steps 4 and 5 filling of one vacancy with another N atom from NH3. Unchanged table adapted from [13], Reprinted from Applied Catalysis A General, Vol. 392, T. Otremba, N. Frenzel, M. Lerch, T. Ressler, and R. Schomacker, Kinetic studies on ammonia decomposition over zirconium oxynitride, 103-110, Copyright (2011), with permission from... 

Otremba T, Frenzel N, Lerch M, Ressler T, Schomacker R. Kinetic studies on ammonia decomposition over zirconium oxynitride. Appl Catal A Gen. 2011 392( 1 —2) 103— 10. 

Soerijanto H, Rodel C, Wild U, Lerch M, Schomacker R, Schlogl R, Ressler T. The impact of nitrogen mobility on the activity of zirconium oxynitride catalysts for ammonia decomposition. Journal of Catalysis. 2007 250(l) 19-24. 

M-SiAlON systems contain a combination of M atoms. Glass formation is found to be easier, more the types of atoms present in the nitrided glasses. Several simple silicates and phosphates which are nitrided have provided much insight into the stmcture of oxynitride glasses. 

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