Dinitrogen Reduction: Interfacing the Enzyme Nitrogenase with Electrodes
نویسندگان
چکیده
منابع مشابه
Competitive 15N kinetic isotope effects of nitrogenase-catalyzed dinitrogen reduction.
Biological N2 fixation is achieved under ambient conditions by enzymatic catalysis. The enzyme nitrogenase has been studied extensively, but the N2 chemical reduction step is, by far, not rate limiting and hard to examine. A new method was developed that allows studying the reduction transition state within the enzyme's complex kinetic cascade by means of the 15N kinetic isotope effect on the r...
متن کاملHydrazine is a product of dinitrogen reduction by the vanadium-nitrogenase from Azotobacter chroococcum.
During the enzymic reduction of N2 to NH3 by Mo-nitrogenase, free hydrazine (N2H4) is not detectable, but an enzyme-bound intermediate can be made to yield N2H4 by quenching the enzyme during turnover [Thorneley, Eady & Lowe (1978) Nature (London) 272, 557-558]. In contrast, we show here that the V-nitrogenase of Azotobacter chroococcum produces a small but significant amount of free N2H4 (up t...
متن کاملNitrogenase-mimic iron-containing chalcogels for photochemical reduction of dinitrogen to ammonia.
A nitrogenase-inspired biomimetic chalcogel system comprising double-cubane [Mo2Fe6S8(SPh)3] and single-cubane (Fe4S4) biomimetic clusters demonstrates photocatalytic N2 fixation and conversion to NH3 in ambient temperature and pressure conditions. Replacing the Fe4S4 clusters in this system with other inert ions such as Sb(3+), Sn(4+), Zn(2+) also gave chalcogels that were photocatalytically a...
متن کاملReduction of dinitrogen.
C onversion of dinitrogen to ammonia is required for all life. This conversion is accomplished by metalloenzymes on a scale of 108 tons year, a scale equivalent to that of the Haber–Bosch process (1) for making ammonia from dinitrogen and dihydrogen at high temperatures (350–550°C) and pressures [150–350 atmosphere (atm); 1 atm 101.3 kPa]. Although the benefit of crop rotation has been known fo...
متن کاملCar-Parrinello molecular dynamics study of the initial dinitrogen reduction step in Sellmann-type nitrogenase model complexes.
We have studied reduction reactions for nitrogen fixation at Sellmann-type model complexes with Car-Parrinello simulation techniques. These dinuclear complexes are especially designed to emulate the so-called open-side FeMoco model. The main result of this work shows that in order to obtain the reduced species several side reactions have to be suppressed. These involve partial dissociation of t...
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ژورنال
عنوان ژورنال: Angewandte Chemie International Edition
سال: 2017
ISSN: 1433-7851
DOI: 10.1002/anie.201701179