Robust Ru single-atom alloy catalysts coupled with adjacent Fe-site for highly stable ammonia synthesis under mild conditions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73627756" target="_blank" >RIV/61989592:15640/25:73627756 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27640/25:10256563
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0169433224026229?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169433224026229?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apsusc.2024.161906" target="_blank" >10.1016/j.apsusc.2024.161906</a>
Alternative languages
Result language
angličtina
Original language name
Robust Ru single-atom alloy catalysts coupled with adjacent Fe-site for highly stable ammonia synthesis under mild conditions
Original language description
In our pursuit of an efficient catalyst for ammonia production, we developed ruthenium (Ru)-based single atom alloy catalysts on a layered double hydroxide-derived support. The extended X-ray absorption fine structure studies provided evidence of single Ru atoms as a Fe-Ru alloy. High-resolution transmission electron microscopy showcased a larger particle size with higher Ru loading, emphasizing the role of Ru site geometry in catalytic activity. The MgFeOx-0.1Ru catalyst, with optimal Ru dispersion and smaller Fe-Ru particle size (1.6 nm), outperformed other catalysts in NH3 synthesis and demonstrated exceptional stability. Remarkably, the catalyst with 0.1 wt% Ru exhibited superior performance, achieving an exceptional NH3 formation rate of 17,897 mu mol g- 1 h- 1 (at 400 degrees C, 5 MPa, and Weight hourly space velocity (WHSV) of 50,000 mL g- 1 h- 1) along with maintaining a consistent NH3 synthesis rate of 7,217 mu mol g- 1 h- 1 (at 400 degrees C, WHSV of 10,000 mL g- 1 h- 1, and 5 MPa), for a notable duration of 150 h. Our first-principles calculations show that Ru weakened the binding of both molecular and atomic nitrogen on the catalyst's surface, facilitating the desorption of N-intermediates. The optimized MgFeOx-0.1Ru catalyst composition with characteristics such as small Fe-Ru alloy particle size and the presence of all active Ru sites on the surface improves lifetime, reducing costs and marking a significant stride towards sustainable and economically viable NH3 production.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
APPLIED SURFACE SCIENCE
ISSN
0169-4332
e-ISSN
1873-5584
Volume of the periodical
685
Issue of the periodical within the volume
March
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
16
Pages from-to
nestránkováno
UT code for WoS article
001389679200001
EID of the result in the Scopus database
2-s2.0-85211992206