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Size-Dependent Strong Metal–Support Interactions of Rutile TiO 2 -Supported Ni Catalysts for Hydrodeoxygenation of m-Cresol.
- Source :
- Catalysts (2073-4344); Sep2022, Vol. 12 Issue 9, pN.PAG-N.PAG, 14p
- Publication Year :
- 2022
-
Abstract
- A series of rutile TiO<subscript>2</subscript>-supported Ni catalysts with varying Ni sizes were prepared and reduced at 650 °C to explore the effect of Ni size on the strong metal–support interactions (SMSI) and its consequences on the hydrodeoxygenation (HDO) of m-cresol at 350 °C and atmospheric pressure. When the Ni size increases from 4 to 29.1 nm, the SMSI becomes stronger, e.g., the thickness of the TiO<subscript>x</subscript> overlayer and the coverage extent of TiO<subscript>x</subscript> on the Ni particle surface increase. Direct deoxygenation to toluene is the dominant pathway on Ni/TiO<subscript>2</subscript> catalysts with varying Ni loadings, with almost no CH<subscript>4</subscript> being formed. These results indicate that the TiO<subscript>x</subscript> overlayer significantly alters the property of Ni. That is, the C-C hydrogenolysis activity on bare Ni is completely inhibited due to SMSI, while the deoxygenation activity is improved at the Ni-TiO<subscript>x</subscript> interfacial perimeter sites. Meanwhile, the turnover frequency of HDO on small Ni particles of 4 nm is > 2 times higher than that on large Ni particles of 29.1 nm, indicating that the small Ni particle with moderate SMSI appears to be optimal for the direct deoxygenation of m-cresol to toluene. The results suggest HDO activity may be enhanced by tuning the metal particle size and SMSI degree. [ABSTRACT FROM AUTHOR]
- Subjects :
- TITANIUM dioxide
CATALYSTS
ATMOSPHERIC pressure
DEOXYGENATION
RUTILE
HYDROGENOLYSIS
Subjects
Details
- Language :
- English
- ISSN :
- 20734344
- Volume :
- 12
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Catalysts (2073-4344)
- Publication Type :
- Academic Journal
- Accession number :
- 159334157
- Full Text :
- https://doi.org/10.3390/catal12090955