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Journal article
Unlocking the Potential of MXene in Catalysis: Decorated Mo2CTx Catalyst for Ammonia Synthesis under Mild Conditions
Journal of the American Chemical Society, v 146(29), pp 20033-20044
24 Jul 2024
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Abstract
Ammonia, which is one of the most important chemicals for the synthesis of dyes, pharmaceuticals, and fertilizers, is produced by the reaction of molecular hydrogen with nitrogen, over an iron-based catalyst at 400-500 °C under pressure of over 100 bar. Decreasing the operating temperature and pressure of this highly energy-intensive process, developed by Haber and Bosch over 100 years ago, would decrease energy consumption in the world. In this work, we used two-dimensional Mo2CTx MXene as a support for a cobalt-based catalyst. The MXene functionalized by Co showed catalytic activity for ammonia synthesis from H2 and N2 at temperatures as low as 250 °C, without any pretreatment. The developed catalyst was highly active for ammonia synthesis, demonstrating a high rate of up to 9500 μmol g-1active phase h-1 at 400 °C under ambient pressure in steady-state conditions, and did not suffer from any deactivation after 15 days of reaction. The apparent activation energy (Ea) was found to be in the range of 68-74 kJ mol-1, which is in line with values reported for highly active catalysts. This improved catalyst may decrease the energy consumption in the synthesis of ammonia and its derivatives, as well as facilitate the use of ammonia as a hydrogen carrier for renewable energy storage.Ammonia, which is one of the most important chemicals for the synthesis of dyes, pharmaceuticals, and fertilizers, is produced by the reaction of molecular hydrogen with nitrogen, over an iron-based catalyst at 400-500 °C under pressure of over 100 bar. Decreasing the operating temperature and pressure of this highly energy-intensive process, developed by Haber and Bosch over 100 years ago, would decrease energy consumption in the world. In this work, we used two-dimensional Mo2CTx MXene as a support for a cobalt-based catalyst. The MXene functionalized by Co showed catalytic activity for ammonia synthesis from H2 and N2 at temperatures as low as 250 °C, without any pretreatment. The developed catalyst was highly active for ammonia synthesis, demonstrating a high rate of up to 9500 μmol g-1active phase h-1 at 400 °C under ambient pressure in steady-state conditions, and did not suffer from any deactivation after 15 days of reaction. The apparent activation energy (Ea) was found to be in the range of 68-74 kJ mol-1, which is in line with values reported for highly active catalysts. This improved catalyst may decrease the energy consumption in the synthesis of ammonia and its derivatives, as well as facilitate the use of ammonia as a hydrogen carrier for renewable energy storage.
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Details
- Title
- Unlocking the Potential of MXene in Catalysis: Decorated Mo2CTx Catalyst for Ammonia Synthesis under Mild Conditions
- Creators
- Amanda Sfeir - École Nationale Supérieure de Chimie de LilleChristopher E Shuck - Drexel University, Materials Science and EngineeringAlexandre Fadel - Université d'ArtoisMaya Marinova - Université d'ArtoisHervé Vezin - Université de LilleJean-Philippe DacquinYury Gogotsi (Corresponding Author) - Drexel University, Materials Science and EngineeringSébastien Royer - École Nationale Supérieure de Chimie de LilleSaid Laassiri - Université Mohammed VI Polytechnique
- Publication Details
- Journal of the American Chemical Society, v 146(29), pp 20033-20044
- Publisher
- ACS Publications
- Number of pages
- 12
- Grant note
- Chevreul Institute: FR 2638
The preparation of MAX phases and MXenes and their characterization was done by A. Sfeir during her stay at Drexel University. Said Laassiri would like to thank UM6P for support and funding. The CNRS, the Chevreul Institute (FR 2638), the Ministere de l'Enseignement Superieur et de la Recherche, the Region Hauts-de-France, the FEDER, and the MEL are acknowledged for supporting this work. The authors would like to thank the University of Lille for PhD granting (A. Sfeir) and I-Site ULNE for supporting partially this work.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001276278400001
- Scopus ID
- 2-s2.0-85198543072
- Other Identifier
- 991021893600404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary