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Engineering ZrO2–Ru interface to boost Fischer-Tropsch synthesis to olefins.
- Source :
- Nature Communications; 6/17/2024, Vol. 15 Issue 1, p1-11, 11p
- Publication Year :
- 2024
-
Abstract
- Understanding the structures and reaction mechanisms of interfacial active sites in the Fisher-Tropsch synthesis reaction is highly desirable but challenging. Herein, we show that the ZrO<subscript>2</subscript>-Ru interface could be engineered by loading the ZrO<subscript>2</subscript> promoter onto silica-supported Ru nanoparticles (ZrRu/SiO<subscript>2</subscript>), achieving 7.6 times higher intrinsic activity and ~45% reduction in the apparent activation energy compared with the unpromoted Ru/SiO<subscript>2</subscript> catalyst. Various characterizations and theoretical calculations reveal that the highly dispersed ZrO<subscript>2</subscript> promoter strongly binds the Ru nanoparticles to form the Zr-O-Ru interfacial structure, which strengthens the hydrogen spillover effect and serves as a reservoir for active H species by forming Zr-OH* species. In particular, the formation of the Zr-O-Ru interface and presence of the hydroxyl species alter the H-assisted CO dissociation route from the formyl (HCO*) pathway to the hydroxy-methylidyne (COH*) pathway, significantly lowering the energy barrier of rate-limiting CO dissociation step and greatly increasing the reactivity. This investigation deepens our understanding of the metal-promoter interaction, and provides an effective strategy to design efficient industrial Fisher-Tropsch synthesis catalysts. Understanding the structures of interfacial active sites is crucial in heterogeneous catalysis. Here the authors demonstrate that a ZrO<subscript>2</subscript>-Ru interface site significantly enhances reactivity in the Fischer-Tropsch to olefins process by altering the H-assisted CO dissociation route due to the presence of hydroxy species associated with Zr-OH*. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 15
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 177950027
- Full Text :
- https://doi.org/10.1038/s41467-024-49392-w