Citation: Jinghua An, Yehong Wang, Zhixin Zhang, Jian Zhang, Martin Gocyla, Rafal E. Dunin-Borkowski, Feng Wang. Linear-regioselective hydromethoxycarbonylation of styrene using Ru-clusters/CeO₂ catalyst[J]. Chinese Journal of Catalysis, ;2020, 41(6): 963-969. doi: S1872-2067(19)63527-8 shu

Linear-regioselective hydromethoxycarbonylation of styrene using Ru-clusters/CeO₂ catalyst

a State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b University of Chinese Academy of Sciences, Beijing 100049, China;
c Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Juelich GmbH, Juelich 52425, Germany

Received Date: 31 October 2019
Revised Date: 18 December 2019

Fund Project: This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDB17020300), and the National Natural Science Foundation of China (21721004, 21690084, and 21690080).

Hydroalkoxycarbonylation of olefins has been considered to be one of the most attractive methods to synthesize esters. Controlling the regioselectivities of linear esters (L) and branched esters (B) is a challenging project for researchers working in this reaction. Although most of the attention has been paid to control the regioselectivity through ligand design in homogeneous catalytic systems, study in the area is still limited. Herein, Ru-clusters/CeO₂ is employed as a heterogeneous catalyst for the hydromethoxycarbonylation of styrene without any additives. After optimization of the reaction conditions, the conversion of styrene is> 99% with 83% and 12% regioselectivity of linear and branched ester, respectively. By using different supports (CeO₂ (nanoparticle), CeO₂-rod, and CeO₂-cube), three catalysts including Ru-clusters/CeO₂, Ru/CeO₂-rod, and Ru/CeO₂-cube are prepared and applied in the reaction. Structural characterizations demonstrate that the L/B ratio is related to the Ru size of supported Ru catalysts. Further Raman characterization and NH₃-TPD demonstrate that the metal-support interaction and the concentration of oxygen vacancy of the catalyst have a great influence on the Ru size. The mechanism and kinetic analysis for this reaction are also investigated in this work.
- Regioselectivity,
- Ru-clusters/CeO₂,
- Ester,
- Hydromethoxycarbonylation,
- Olefins,
- Heterogeneous catalysis
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Linear-regioselective hydromethoxycarbonylation of styrene using Ru-clusters/CeO2 catalyst

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Linear-regioselective hydromethoxycarbonylation of styrene using Ru-clusters/CeO₂ catalyst