Electrochemical Reduction of N2 to NH3 at Low Potential by a Molecular Aluminum Complex

TJ Sherbow, EJ Thompson, A Arnold… - … A European Journal, 2019 - Wiley Online Library
Chemistry–A European Journal, 2019Wiley Online Library
Electrochemical generation of ammonia (NH3) from nitrogen (N2) using renewable
electricity is a desirable alternative to current NH3 production methods, which consume
roughly 1% of the world's total energy use. The use of catalysts to manipulate the required
electron and proton transfer reactions with low energy input is also a chemical challenge
that requires development of fundamental reaction pathways. This work presents an
approach to the electrochemical reduction of N2 into NH3 using a coordination complex of …
Abstract
Electrochemical generation of ammonia (NH3) from nitrogen (N2) using renewable electricity is a desirable alternative to current NH3 production methods, which consume roughly 1 % of the world's total energy use. The use of catalysts to manipulate the required electron and proton transfer reactions with low energy input is also a chemical challenge that requires development of fundamental reaction pathways. This work presents an approach to the electrochemical reduction of N2 into NH3 using a coordination complex of aluminum(III), which facilitates NH3 production at −1.16 V vs. SCE. Reactions performed under 15N2 liberate 15NH3. Electron paramagnetic resonance spectroscopic characterization of a reduced intermediate and investigations of product inhibition, which limit the reaction to sub‐stoichiometric, are also presented.
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