Synergistic effects of catalysts and plasmas on the synthesis of ammonia and hydrazine
Synergistic effects of catalysts and plasmas on the synthesis of ammonia and hydrazine
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DOI：
10.1007/bf01570208
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发表时间：
1994-12
影响因子：
3.6
通讯作者：
Shigeyuki Tanaka;H. Uyama;O. Matsumoto
中科院分区：
文献类型：
--
作者：
Shigeyuki Tanaka;H. Uyama;O. Matsumoto
研究了在氮氢射频和微波等离子体中，铁和钼丝的放电驱动频率和催化作用的协同效应。在使用两种驱动频率制备的等离子体中，氨产率增加。但肼产率仅在使用催化剂的火焰射频放电中增加。在射频放电中，NH3和N2 H4的生成是等离子体中NHx在催化剂表面的直接吸附.另一方面，在微波放电中，N原子的吸附和/或金属- N键的形成有利于氨的形成，但不影响肼的形成。
The synergistic effects o1 driving frequency of the discharge and catalysis of iron and molybdenum wires when then are placed in nitrogen-h ydrogen radio-frequency and microwave plasmas mere investigated. The ammonia Yield increased in the plasmas prepared using both driving frequencies. but the hydrazine yield increased only in fire radio-frequency discharge with the catalysts. The direct adsorption of NHxformed in the plasma on the catalyst surface followed by the formation of NH3and N2H4are considered as a reaction scheme in the radio-frequency discharge. On the other hand, the adsorption of N atoms and/or formation of the metal- N bond favors the formation of ammonia but does not affect the hydrazine formation in the microwave discharge.