Electride support boosts nitrogen dissociation over ruthenium catalyst and shifts the bottleneck in ammonia synthesis
Abstract
Novel approaches to efficient ammonia synthesis at an ambient pressure are actively sought out so as to reduce the cost of ammonia production and to allow for compact production facilities. It is accepted that the key is the development of a high-performance catalyst that significantly enhances dissociation of the nitrogen–nitrogen triple bond, which is generally considered a rate-determining step. Here we examine kinetics of nitrogen and hydrogen isotope exchange and hydrogen adsorption/desorption reactions for a recently discovered efficient catalyst for ammonia synthesis—ruthenium-loaded 12CaO _ 7Al2O3 electride (Ru/C12A7:e_)—and find that the rate controlling step of ammonia synthesis over Ru/C12A7:e_ is not dissociation of the nitrogen–nitrogen triple bond but the subsequent formation of N–Hn species. A mechanism of ammonia synthesis involving reversible storage and release of hydrogen atoms on the Ru/C12A7:e_ surface is proposed on the basis of observed hydrogen absorption/desorption kinetics.
- Authors:
-
- Tokyo Inst. of Technology (Japan). Materials Research Center for Element Strategy
- Tokyo Inst. of Technology (Japan). Materials and Structures Lab.
- Tokyo Inst. of Technology (Japan). Materials and Structures Lab.
- Univ. College London (UCL), London (United Kingdom). Dept. of Physics and Astronomy
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); ACCEL, Japan Science and Technology Agency, Kawaguchi (Japan)
- Tokyo Inst. of Technology (Japan). Materials Research Center for Element Strategy; ACCEL, Japan Science and Technology Agency, Kawaguchi (Japan)
- Tokyo Inst. of Technology (Japan). Materials and Structures Lab.; ACCEL, Japan Science and Technology Agency, Kawaguchi (Japan); Tokyo Inst. of Technology (Japan). Frontier Research Center
- Tokyo Inst. of Technology (Japan). Materials Research Center for Element Strategy; Tokyo Inst. of Technology (Japan). Materials and Structures Lab.; ACCEL, Japan Science and Technology Agency, Kawaguchi (Japan); Tokyo Inst. of Technology (Japan). Frontier Research Center
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1260712
- Alternate Identifier(s):
- OSTI ID: 1347879
- Report Number(s):
- PNNL-SA-124228
Journal ID: ISSN 2041-1723; ncomms7731
- Grant/Contract Number:
- EP/ L000202; AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Kitano, Masaaki, Kanbara, Shinji, Inoue, Yasunori, Kuganathan, Navaratnarajah, Sushko, Peter V., Yokoyama, Toshiharu, Hara, Michikazu, and Hosono, Hideo. Electride support boosts nitrogen dissociation over ruthenium catalyst and shifts the bottleneck in ammonia synthesis. United States: N. p., 2015.
Web. doi:10.1038/ncomms7731.
Kitano, Masaaki, Kanbara, Shinji, Inoue, Yasunori, Kuganathan, Navaratnarajah, Sushko, Peter V., Yokoyama, Toshiharu, Hara, Michikazu, & Hosono, Hideo. Electride support boosts nitrogen dissociation over ruthenium catalyst and shifts the bottleneck in ammonia synthesis. United States. https://doi.org/10.1038/ncomms7731
Kitano, Masaaki, Kanbara, Shinji, Inoue, Yasunori, Kuganathan, Navaratnarajah, Sushko, Peter V., Yokoyama, Toshiharu, Hara, Michikazu, and Hosono, Hideo. Mon .
"Electride support boosts nitrogen dissociation over ruthenium catalyst and shifts the bottleneck in ammonia synthesis". United States. https://doi.org/10.1038/ncomms7731. https://www.osti.gov/servlets/purl/1260712.
@article{osti_1260712,
title = {Electride support boosts nitrogen dissociation over ruthenium catalyst and shifts the bottleneck in ammonia synthesis},
author = {Kitano, Masaaki and Kanbara, Shinji and Inoue, Yasunori and Kuganathan, Navaratnarajah and Sushko, Peter V. and Yokoyama, Toshiharu and Hara, Michikazu and Hosono, Hideo},
abstractNote = {Novel approaches to efficient ammonia synthesis at an ambient pressure are actively sought out so as to reduce the cost of ammonia production and to allow for compact production facilities. It is accepted that the key is the development of a high-performance catalyst that significantly enhances dissociation of the nitrogen–nitrogen triple bond, which is generally considered a rate-determining step. Here we examine kinetics of nitrogen and hydrogen isotope exchange and hydrogen adsorption/desorption reactions for a recently discovered efficient catalyst for ammonia synthesis—ruthenium-loaded 12CaO _ 7Al2O3 electride (Ru/C12A7:e_)—and find that the rate controlling step of ammonia synthesis over Ru/C12A7:e_ is not dissociation of the nitrogen–nitrogen triple bond but the subsequent formation of N–Hn species. A mechanism of ammonia synthesis involving reversible storage and release of hydrogen atoms on the Ru/C12A7:e_ surface is proposed on the basis of observed hydrogen absorption/desorption kinetics.},
doi = {10.1038/ncomms7731},
journal = {Nature Communications},
number = ,
volume = 6,
place = {United States},
year = {Mon Mar 30 00:00:00 EDT 2015},
month = {Mon Mar 30 00:00:00 EDT 2015}
}
Web of Science
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