Enhancing Vinyl Acetate Hydroformylation with La-Decorated Rh/TiO2 Nanotubes Catalysts
Hongyuan Chuai1, Baolin Zhu1, Shoumin Zhang1
1College of Chemistry, Nankai University, Tianjin, 300071, China.
Lanthanum (La) promoter enhances rhodium (Rh) nanoparticle catalysts on titanium dioxide (TiO2) nanotubes for vinyl acetate hydroformylation. Optimized catalysts show high conversion and aldehyde selectivity.
Area of Science:
- Heterogeneous catalysis
- Nanomaterials science
- Organometallic chemistry
Background:
- Rhodium nanoparticles supported on TiO2 nanotubes (TNTs) are explored for hydroformylation.
- Lanthanum (La) is investigated as a promoter to enhance catalytic activity.
Purpose of the Study:
- To investigate the influence of La promoter on Rh/TNTs catalysts for vinyl acetate hydroformylation.
- To correlate catalyst structure and composition with hydroformylation performance.
Main Methods:
- Catalyst characterization using ICP-MS, BET, XRD, SEM, TEM, XPS, FTIR, and H2/CO-TPD.
- Evaluation of catalytic performance in vinyl acetate hydroformylation.
Main Results:
- The La promoter facilitates the formation of LaOx-Rh active sites.
- Optimized Rh0.25-La/TNTs catalyst (0.14 wt% Rh, 0.29 wt% La) achieved 89% vinyl acetate conversion.
- High aldehyde selectivity (66%) and turnover frequency (5796 h-1) were observed.
Conclusions:
- Lanthanum promotion significantly improves the catalytic performance of Rh/TNTs in vinyl acetate hydroformylation.
- The formation of LaOx-Rh active sites is crucial for enhanced catalytic activity and selectivity.
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