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Efficient and Stable Ammonia Synthesis by Self-Organized Flat Ru Nanoparticles on Calcium Amide
Abstract
Efficient and stable catalysts for ammonia synthesis under mild conditions are required to meet the strong demand for NH 3 as an important precursor chemical and hydrogen carrier. Here we report that during ammonia synthesis, flat-shaped Ru nanoparticles with a narrow distribution (2.1 ± 1.0 nm) and self-organized on Ca(NH 2 ) 2 exhibit high catalytic performance far exceeding alkali-promoted Ru-based catalysts in yield and turnover frequency (TOF). This catalyst enables continuous NH 3 production, even at 473 K under ambient pressure. During ammonia synthesis, Ru nanoparticles are distinctly anchored on the surface of Ca(NH 2 ) 2 by strong Ru–N interaction, which leads to the epitaxial growth of Ru on the support surface. The high catalytic performance is due to the formation of high-density flat-shaped Ru nanoparticles and high electron donor ability at the Ru/Ca(NH 2 ) 2 interface. The catalytic stability is significantly improved by Ba-doping of Ca(NH 2 ) 2, and no degradation was observed after ca. 700 h of operation.
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Cites
Strong metal-support interactions. Group 8 noble metals supported on titanium dioxide
Tauster, S. J., Fung, S. C., & Garten, R. L. (1978) · Journal of the American Chemical Society · doi:10.1021/ja00469a029 · Cited by 3,188
Cited by
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Chen, X., Li, N., Kong, Z., Ong, W.-J., & Zhao, X. (2018) · Materials Horizons · doi:10.1039/c7mh00557a · Cited by 771
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Ternary intermetallic LaCoSi as a catalyst for N2 activation
Gong, Y., Wu, J., Kitano, M., Wang, J., Ye, T.-N., Li, J., Kobayashi, Y., Kishida, K., Abe, H., Niwa, Y., et al. (2018) · Nature Catalysis · doi:10.1038/s41929-017-0022-0 · Cited by 319
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He, T., Cao, H., & Chen, P. (2019) · Advanced Materials · doi:10.1002/adma.201902757 · Cited by 256
Perspective on Intensification of Haber−Bosch to Enable Ammonia Production under Milder Conditions
Lin, B., Nowrin, F. H., Rosenthal, J. J., Bhown, A. S., & Malmali, M. (2023) · ACS Sustainable Chemistry & Engineering · doi:10.1021/acssuschemeng.2c06711 · Cited by 114
Metadata
- Authors
- Inoue, Y., Kitano, M., Kishida, K., Abe, H., Niwa, Y., Sasase, M., Fujita, Y., Ishikawa, H., Yokoyama, T., Hara, M., & Hosono, H.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-10-07
- Volume
- 6
- Issue
- 11
- Pages
- 7577-7584
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2529182830
- Cited by
- 170
- References
- 1
- FWCI
- 5.81
- Type
- journal article
- Language
- en
- Open access
- closed
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- Inoue, Y., Kitano, M., Kishida, K., Abe, H., Niwa, Y., Sasase, M., Fujita, Y., Ishikawa, H., Yokoyama, T., Hara, M., & Hosono, H. (2016). Efficient and Stable Ammonia Synthesis by Self-Organized Flat Ru Nanoparticles on Calcium Amide. ACS Catalysis. https://doi.org/10.1021/acscatal.6b01940
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