Density functional theory (DFT) calculations of reaction paths and energies for the industrial and the biological catalytic ammonia synthesis processes are compared. The industrial catalyst is modeled by a ruthenium surface, while the active part of the enzyme is modeled by a complex. In contrast to the biological process, the industrial process requires high temperatures and pressures to proceed, and an explanation of this important difference is discussed. The possibility of a metal surface catalyzed process running at low temperatures and pressures is addressed, and DFT calculations have been carried out to evaluate its feasibility. The calculations suggest that it might be possible to catalytically produce ammonia from molecular nitrogen at low temperatures and pressures, in particular if energy is fed into the process electrochemically.
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22 March 2000
Research Article|
March 22 2000
Ammonia synthesis at low temperatures
T. H. Rod;
T. H. Rod
Center for Atomic-scale Materials Physics, Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark
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A. Logadottir;
A. Logadottir
Center for Atomic-scale Materials Physics, Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark
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J. K. Nørskov
J. K. Nørskov
Center for Atomic-scale Materials Physics, Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark
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J. Chem. Phys. 112, 5343–5347 (2000)
Article history
Received:
December 16 1999
Accepted:
December 20 1999
Citation
T. H. Rod, A. Logadottir, J. K. Nørskov; Ammonia synthesis at low temperatures. J. Chem. Phys. 22 March 2000; 112 (12): 5343–5347. https://doi.org/10.1063/1.481103
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