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Encapsulation of Ru nanoparticles: Modifying the reactivity toward CO and CO2 methanation on highly active Ru/TiO2 catalysts
Abstract
Abstract Aiming at a better understanding of the complex interactions between metal nanoparticles (NPs) and oxide supports, ranging from purely electronic metal-support interactions (EMSIs) to structural modifications associated with strong metal-support interactions (SMSIs), we investigated the impact of a temperature programmed reduction treatment (TPR) of a highly active Ru/TiO2 catalyst on its physical properties and its CO and CO2 methanation performance by kinetic and spectroscopic techniques, in combination with structural characterization. XP, EPR and DRIFT spectra resolved a significant shift of the Ru 3d levels to lower binding energies, the formation of O-vacancy defects and a red-shift of COad related bands, respectively, after the TPR sequence. This indicates an increase of the local charge density in the Ru NPs, due to charge transfer from O-vacancy defects to the Ru NPs. Finally, from CO adsorption and XPS measurements we conclude on a partial encapsulation of the Ru NPs by a TiOx layer.
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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
Metal–support interactions in metal oxide-supported atomic, cluster, and nanoparticle catalysis
Leybo, D., Etim, U. J., Monai, M., Bare, S. R., Zhong, Z., & Vogt, C. (2024) · Chemical Society Reviews · doi:10.1039/d4cs00527a · Cited by 417
Metadata
- Authors
- Abdel-Mageed, A. M., Wiese, K., Parlinska-Wojtan, M., Rabeah, J., Brückner, A., & Behm, R. J.
- Venue
- Applied Catalysis B: Environmental
- Publisher
- Elsevier BV
- Published
- 2020-08
- Volume
- 270
- Pages
- 118846
- ISSN
- 0926-3373 (ISSN-L)
- OpenAlex
- W3009363674
- Cited by
- 159
- References
- 1
- FWCI
- 4.32
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Abdel-Mageed, A. M., Wiese, K., Parlinska-Wojtan, M., Rabeah, J., Brückner, A., & Behm, R. J. (2020). Encapsulation of Ru nanoparticles: Modifying the reactivity toward CO and CO2 methanation on highly active Ru/TiO2 catalysts. Applied Catalysis B: Environmental. https://doi.org/10.1016/j.apcatb.2020.118846
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