CO2 hydrogenation with shape-controlled Pd nanoparticles embedded in mesoporous silica: elucidating stability and selectivity issues
(2015) Catalysis Communications — Vol. 58, p. 11-15 (2015)
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- Abstract
- Shape-controlled Pd nanocubes and nanopolyedra particles were embedded in mesoporous silica shells and their catalytic properties for the CO2 hydrogenation were compared to a reference Pd/SiO2 catalyst prepared by wetness impregnation. Whereas the Pd impregnated silica exhibits a strong deactivation, the activity of both embedded solids is remarkably stable. This difference is due to a significant Pd particles sintering in the reference catalyst while no increase of particle size is observed for the core@shell solids. CH4 selectivity is shown to be correlated to the mean coordination number of surface atoms which controls the adsorption strength of CO as intermediate species.
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Martins, J., Batail, N., Silva, S., Rafik-Clement, S., Karelovic Burotto, A., Debecker, D., Chaumonnot, A., & Uzio, D. (2015). CO2 hydrogenation with shape-controlled Pd nanoparticles embedded in mesoporous silica: elucidating stability and selectivity issues. Catalysis Communications, 58, 11-15. https://doi.org/10.1016/j.catcom.2014.08.027 (Original work published 2015)