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Huihuang Fang, Simson Wu, Tuğçe Ayvalı, Jianwei Zheng, Joshua P. Fellowes, Ping-Luen Ho, Kwan Chee Leung, Alexander I. Large, Georg Held, Ryuichi Kato and 5 more
Ammonia is regarded as an energy vector for hydrogen storage, transport and utilization, which links to usage of renewable energies. However, efficient catalysts for ammonia decomposition and their underlying mechanism yet remain obscure. Here we report that atomically-dispersed Ru atoms on MgO support on its polar (111) facets {denoted as MgO(111)} show the highest rate of ammonia decomposition, as far as we are aware, than all catalysts reported in literature due to the strong metal-support interaction and efficient surface coupling reaction. We have carefully investigated the loading effect of Ru from atomic form to cluster/nanoparticle on MgO(111). Progressive increase of surface Ru concentration, correlated with increase in specific activity per metal site, clearly indicates synergistic metal sites in close proximity, akin to those bimetallic N 2 complexes in solution are required for the stepwise dehydrogenation of ammonia to N 2 /H 2 , as also supported by DFT modelling. Whereas, beyond surface doping, the specific activity drops substantially upon the formation of Ru cluster/nanoparticle, which challenges the classical view of allegorically higher activity of coordinated Ru atoms in cluster form (B 5 sites) than isolated sites.
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Fang, H., Wu, S., Ayvalı, T., Zheng, J., Fellowes, J. P., Ho, P.-L., Leung, K. C., Large, A. I., Held, G., Kato, R., Suenaga, K., Reyes, Y. I. A., Thang, H. V., Chen, H. T., & Tsang, S. C. E. (2023). Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition. Nature Communications, 14(1), 647. https://doi.org/10.1038/s41467-023-36339-w
Fang, Huihuang, et al. "Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition." Nature Communications, vol. 14, no. 1, 2023, pp. 647, https://doi.org/10.1038/s41467-023-36339-w.
Fang, Huihuang, Simson Wu, Tuğçe Ayvalı, Jianwei Zheng, Joshua P. Fellowes, Ping-Luen Ho, Kwan Chee Leung, et al. "Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition." Nature Communications 14, no. 1 (2023): 647. https://doi.org/10.1038/s41467-023-36339-w.
Fang H., Wu S., Ayvalı T. [и др.] Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition // Nature Communications. — 2023. — Vol. 14, № 1. — P. 647. — URL: https://doi.org/10.1038/s41467-023-36339-w
@article{fang2023dispersed,
title = {{Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition}},
author = {Huihuang Fang and Simson Wu and Tuğçe Ayvalı and Jianwei Zheng and Joshua P. Fellowes and Ping-Luen Ho and Kwan Chee Leung and Alexander I. Large and Georg Held and Ryuichi Kato and Kazu Suenaga and Yves Ira A. Reyes and Ho Viet Thang and Hsin‐Yi Tiffany Chen and Shik Chi Edman Tsang},
journal = {Nature Communications},
year = {2023},
volume = {14},
number = {1},
pages = {647},
doi = {10.1038/s41467-023-36339-w},
url = {https://doi.org/10.1038/s41467-023-36339-w}
}TY - JOUR AU - Fang, Huihuang AU - Wu, Simson AU - Ayvalı, Tuğçe AU - Zheng, Jianwei AU - Fellowes, Joshua P. AU - Ho, Ping-Luen AU - Leung, Kwan Chee AU - Large, Alexander I. AU - Held, Georg AU - Kato, Ryuichi AU - Suenaga, Kazu AU - Reyes, Yves Ira A. AU - Thang, Ho Viet AU - Chen, Hsin‐Yi Tiffany AU - Tsang, Shik Chi Edman TI - Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition JO - Nature Communications VL - 14 IS - 1 SP - 647 PY - 2023 DA - 2023/02/06 DO - 10.1038/s41467-023-36339-w UR - https://doi.org/10.1038/s41467-023-36339-w ER -
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