Catalytic effect of iron wires on the syntheses of ammonia and hydrazine in a radio-frequency discharge
Catalytic effect of iron wires on the syntheses of ammonia and hydrazine in a radio-frequency discharge
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DOI：
10.1007/bf01447174
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发表时间：
1993-03
影响因子：
3.6
通讯作者：
H. Uyama;Toshiyuki Nakamura;Shigeyuki Tanaka;O. Matsumoto
中科院分区：
文献类型：
--
作者：
H. Uyama;Toshiyuki Nakamura;Shigeyuki Tanaka;O. Matsumoto
在650 Pa（5 Torr）的射频放电氮氢等离子体中，研究了铁丝对等离子体合成氨和肼的催化作用。产物主要是氨，包括少量肼。当铁丝被放置在气流下游的等离子体中时，这两种产物的产率都增加了，在氨中增加了约两倍，在联氨中增加了两个数量级。产率随着线数（催化剂的表面积）的增加而增加。氮分子和/或分子离子在铁表面上的解离吸附以及通过与等离子体中的氢反应形成NHx，随后形成NH3或N2 H4被认为是反应方案。用XPS对铁丝表面的NH3进行了鉴定，证实了这一点。
The catalytic effect of iron wires on plasma syntheses of ammonia and hydrazine has been studied in the nitrogen-hydrogen plasma prepared using rf discharge at a pressure of 650 Pa (5 Torr). The product was mainly ammonia including a small amount of hydrazine. When iron wires were placed in the plasma downstream of the gas flow, the yields of both products increased, about two times in ammonia and two orders of magnitude in hydrazine. The yields increased with increasing number of wires (the surface area of the catalyst). The dissociative adsorption of nitrogen molecules and/or molecular ions on the iron surface and the formation of NHxby the reaction with hydrogen in the plasma followed by the formation of NH3or N2H4are considered as a reaction scheme. This is supported by the identification of NH3with XPS of the surface of iron wires.