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Low-T mechanisms of ammonia synthesis on Co3Mo3N

Low-T mechanisms of ammonia synthesis on Co3Mo3N

Zeinalipour-Yazdi, Constantinos D. ORCID: 0000-0002-8388-1549, Hargreaves, Justin S. J. and Catlow, C. Richard A. (2018) Low-T mechanisms of ammonia synthesis on Co3Mo3N. The Journal of Physical Chemistry C, 122 (11). pp. 6078-6082. ISSN 1932-7447 (Print), 1932-7455 (Online) (doi:https://doi.org/10.1021/acs.jpcc.7b12364)

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Abstract

Dispersion-corrected periodic DFT calculations have been applied to elucidate the Langmuir–Hinshelwood (dissociative) and an Eley–Rideal/Mars–van Krevelen (associative) mechanism for ammonia synthesis over Co3Mo3N surfaces, in the presence of surface defects. Comparison of the two distinct mechanisms clearly suggests that apart from the conventional dissociative mechanism, there is another mechanism that proceeds via hydrazine and diazane intermediates that are formed by Eley–Rideal type chemistry, where hydrogen reacts directly with surface activated nitrogen, in order to form ammonia at considerably milder conditions. This result clearly suggests that via surface defects ammonia synthesis activity can be enhanced at milder conditions on one of the most active catalysts for ammonia synthesis.

Item Type: Article
Additional Information: ACS AuthorChoice - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Uncontrolled Keywords: Ammonia synthesis, Co3Mo3N
Subjects: Q Science > QD Chemistry
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Pharmaceutical, Chemical & Environmental Sciences
Last Modified: 03 Oct 2018 15:55
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/21488

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