Surface Single-Cluster Catalyst for N 2 -to-NH 3 Thermal Conversion

The ammonia synthesis from N is of vital importance, with imitating biological nitrogen fixation attracted much interest. Herein, we investigate the catalytic mechanisms of N -to-NH thermal conversion on the singly dispersed bimetallic catalyst Rh Co /CoO(011), and find that the preferred pathway is...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2018-01, Vol.140 (1), p.46-49
Main Authors: Ma, Xue-Lu, Liu, Jin-Cheng, Xiao, Hai, Li, Jun
Format: Article
Language:English
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Summary:The ammonia synthesis from N is of vital importance, with imitating biological nitrogen fixation attracted much interest. Herein, we investigate the catalytic mechanisms of N -to-NH thermal conversion on the singly dispersed bimetallic catalyst Rh Co /CoO(011), and find that the preferred pathway is an associative mechanism analogous to the biological process, in which alternating hydrogenations of the N occur, with H activation on both metal sites. We propose that the singly dispersed bimetallic M A catalyst, in which the doped metal atom M substitutes an oxygen atom on the oxide surface of metal A, serves as a new surface single-cluster catalyst (SCC) design platform for the biomimetic N -to-NH thermal conversion. The catalytic ability of M A catalyst is attributed to both the charge buffer capacity of doped metal M and the complementary role of synergic metal A in catalysis. Our work provides insights and guidelines for further optimizing the M A catalyst.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.7b10354