Results 11 to 20 of about 275,793 (312)
Engineering of electrocatalyst/electrolyte interface for ambient ammonia synthesis
SusMat, 2021 Ammonia is not only an important platform chemical for industrial and agricultural use but is also a novel energy‐carrying molecule. The electrochemical reduction method for ambient ammonia synthesis is emerging as a promising strategy for the ...
Lei Du +5 more
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The nature of the potassium compound acting as a promoter in iron-alumina catalysts for ammonia synthesis [PDF]
, 1975 The chemical form of the potassium promoter on an iron-alumina catalyst during ammonia synthesis has been studied by two methods, viz, (i) the measurement of the equilibrium constant of the process KNH2 + H2 KH + NH3, and (ii) chemical analysis of the ...
Bolink, W.J. +3 more
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Achieving volatile potassium promoted ammonia synthesis via mechanochemistry
Nature Communications, 2023 Potassium oxide (K2O) is used as a promotor in industrial ammonia synthesis, although metallic potassium (K) is better in theory. The reason K2O is used is because metallic K, which volatilizes around 400 °C, separates from the catalyst in the harsh ...
Jong-Hoon Kim +11 more
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mSystems, 2021 Ammonia tolerance is a universal characteristic among the ammonia-oxidizing bacteria (AOB); in contrast, the known species of ammonia-oxidizing archaea (AOA) have been regarded as ammonia sensitive, until the identification of the genus “Candidatus ...
Liangting Liu +4 more
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Rhenium: an ammonia synthesis catalyst [PDF]
The Journal of Physical Chemistry, 1982 Polycrystalline rhenium has been studied as a catalyst for the synthesis of ammonia from its elements. It appears to have an initial activity which is nearly an order of magnitude greater than that of the most active crystal plane of iron (Fe(111)) at the reactant pressures (20 atm) and temperatures (603 to 713 K) studied.
Spencer, N.D., Somorjai, G.A.
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Nanomaterials, 2023 The growing interest in green ammonia production has spurred the development of new catalysts with the potential to carry out the Haber–Bosch process under mild pressure and temperature conditions.
Javier Arroyo-Caire +3 more
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An in situ XAS study of the cobalt rhenium catalyst for ammonia synthesis [PDF]
, 2018 A cobalt rhenium catalyst active for ammonia synthesis at 400 °C and ambient pressure was studied using in situ XAS to elucidate the reducibility and local environment of the two metals during reaction conditions.
Granlund Kirste, Karsten +6 more
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Synthesis of ammonia directly from air and water at ambient temperature and pressure [PDF]
, 2013 The N≡N bond (225 kcal mol−1) in dinitrogen is one of the strongest bonds in chemistry therefore artificial synthesis of ammonia under mild conditions is a significant challenge.
Irvine, John T. S. +2 more
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Ammonia Synthesis at Low Pressure [PDF]
Journal of Visualized Experiments, 2017 Ammonia can be synthesized at low pressure by the use of an ammonia selective absorbent. The process can be driven with wind energy, available locally in areas requiring ammonia for synthetic fertilizer. Such wind energy is often called "stranded," because it is only available far from population centers where it can be directly used.
Edward, Cussler +3 more
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Synthesis and methane cracking activity of a silicon nitride supported vanadium nitride nanoparticle composite [PDF]
, 2017 The co-ammonolysis of V(NMe2)4 and Si(NHMe)4 with ammonia in THF and in the presence of ammonium triflate ([NH4][CF3SO3]) leads to the formation of monolithic gels.
AlShibane, Ihfaf +4 more
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