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Hollow and mesoporous M@aluminosilicate (M = Rh, Pd and Pt) bifunctional catalytic nanoreactors for the hydrodeoxygenation of lignin-derived phenols.
- Source :
-
New Journal of Chemistry . 9/14/2023, Vol. 47 Issue 34, p16043-16049. 7p. - Publication Year :
- 2023
-
Abstract
- Hydrodeoxygenation of lignin-derived phenolic compounds to produce alkanes is a promising method used for mitigating fossil energy consumption, but they often require high temperature and high pressure, resulting in their poor catalytic stability and durability. In this study, we encapsulated ∼3.9 nm active metal Rh nanoparticles (NPs) into ∼40 nm hollow mesoporous aluminosilicate nanospheres (HMANs) to synthesize M@Alx–mSiO2 nanoreactors with adjustable Al contents for guaiacol hydrodeoxygenation. The optimized Rh@Al2.0–mSiO2 catalyst displayed significantly enhanced guaiacol activity and cyclohexane selectivity relative to the Rh@mSiO2 catalyst under mild reaction conditions. According to the characterization results, the high hydrodeoxygenation activity of Rh@Al2.0–mSiO2 could be attributable to the synergistic effect between the metallic Rh and Lewis and Brønsted acid sites, and the introduction of Al species greatly facilitated the adsorption of 2-methylcyclohexanol, thereby enhancing cyclohexane selectivity. The confinement effect of Rh NPs inside the hollow cavities effectively prevents the leaching and aggregation of Rh NPs, thereby improving their catalytic durability and stability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 47
- Issue :
- 34
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 170907367
- Full Text :
- https://doi.org/10.1039/d3nj01590d