The Reduction of Various Nitrides under Hydrogen: Ni3N, Cu3N, Zn3N2 and Ta3N5
The Reduction of Various Nitrides under Hydrogen: Ni3N, Cu3N, Zn3N2 and Ta3N5
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DOI：
10.1007/s11244-012-9890-3
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发表时间：
2012-10-01
影响因子：
3.6
通讯作者：
Mitchell, C.
中科院分区：
文献类型：
--
作者：
Alexander, A. -M.;Hargreaves, J. S. J.;Mitchell, C.
金属氮化物可能是活性氮的潜在来源，它可以与目标有机分子反应。因此，在1/3 Ar/H-2的高温下，确定了Ni3N、Cu3N、Zn3N2和Ta3N5中氮的还原，作为晶格氮反应性的简单测试。考虑到它们的稳定性，Ni3N和Cu3N在250℃时完全还原，高达30%的总晶格氮生成氨。N-2的消除导致孔隙的形成，这在反氮化Cu体系中尤为明显。在Zn3N2的情况下，在400℃下观察到晶格氮的不完全脱氮反应性较差，氨的产生量为总可用氮的15%。虽然Ta3N5所含的活性氮最少，但它可以通过氨解再生，这在任何设想的应用中都是一个重要的考虑因素。
Metal nitrides may be of interest as potential sources of activated nitrogen which can be reacted with target organic molecules. Accordingly, the reduction of nitrogen within Ni3N, Cu3N, Zn3N2 and Ta3N5 under a 1/3 Ar/H-2 flow at elevated temperature has been determined as a simple test of lattice nitrogen reactivity. As anticipated by consideration of their stability, Ni3N and Cu3N are reduced completely at 250 A degrees C with up to 30 % of their total lattice nitrogen yielding ammonia. The elimination of N-2 results in the formation of pores which are particularly pronounced in the case of the denitrided Cu system. In the case of Zn3N2, the lattice nitrogen is less reactive with incomplete denitridation being observed at 400 A degrees C and the amount of ammonia produced being 15 % of the total nitrogen available. Although Ta3N5 contains the least reactive nitrogen of the four samples studied, it can be regenerated by ammonolysis which is an important consideration in any envisaged application.