Journal ArticleDOI
Catalytic effect of iron wires on the syntheses of ammonia and hydrazine in a radio-frequency discharge
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In this article, 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).Abstract:
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 NHx by the reaction with hydrogen in the plasma followed by the formation of NH3 or N2H4 are considered as a reaction scheme. This is supported by the identification of NH3 with XPS of the surface of iron wires.read more
Citations
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State of Transition Metal Catalysts During Carbon Nanotube Growth
Stephan Hofmann,Raoul Blume,C. T. Wirth,Mirco Cantoro,Renu Sharma,Caterina Ducati,Michael Hävecker,Spiros Zafeiratos,Peter Schnörch,Andreas Oestereich,Detre Teschner,Martin Albrecht,Axel Knop-Gericke,Robert Schlögl,John Robertson +14 more
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A review of the use of plasma techniques in catalyst preparation and catalytic reactions
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Journal ArticleDOI
A review on the non-thermal plasma-assisted ammonia synthesis technologies
Peng Peng,Paul Chen,Charles Schiappacasse,Nan Zhou,Erik Anderson,Dongjie Chen,Juer Liu,Yanling Cheng,Raymond Hatzenbeller,Min Addy,Yaning Zhang,Yaning Zhang,Yuhuan Liu,Roger Ruan +13 more
TL;DR: In this article, a systematic review of the plasma-assisted ammonia synthesis under low temperature and pressure conditions is presented, which represents a promising alternative method of clean ammonia synthesis, as it circumvents the volatile operating conditions, fossil fuel use, and high capital costs of the Haber-Bosch process.
References
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Journal ArticleDOI
Synthesis of ammonia in high-frequency discharges
Haruo Uyama,Osamu Matsumoto +1 more
TL;DR: In this paper, the synthesis of ammonia from nitrogen-hydrogen plasma prepared using radiofrequency discharge and microwave discharge was studied under the same experimental conditions except the driving frequency, where twice larger amounts of ammonia were adsorbed on zeolite used as adsorbent in the microwave discharge than in the radio frequency discharge.
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Low Temperature Oxidation of Silicon in a Microwave‐Discharged Oxygen Plasma
Shinichiro Kimura,Eiichi Murakami,Kiyoshi Miyake,Terunori Warabisako,Hideo Sunami,Takashi Tokuyama +5 more
TL;DR: In this article, the Cabrera-Mott model was used to explain the drift motion of oxygen ions across the oxide film under the influence of self-bias in the plasma.
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XPS studies with ammonia synthesis catalysts
Gerhard Ertl,N. Thiele +1 more
TL;DR: In this paper, the surface properties of industrial Fe ammonia catalysts were investigated by means of X-ray photoelectron spectroscopy (XPS) and the results supported the conclusion that dissociative chemisorption of nitrogen is the rate limiting step.