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Rodrigues FMS, Carrilho RMB, Pereira MM. Reusable Catalysts for Hydroformylation‐Based Reactions. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100032] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Fábio M. S. Rodrigues
- Coimbra Chemistry Centre Department of Chemistry University of Coimbra Rua Larga 3004-535 Coimbra Portugal
| | - Rui M. B. Carrilho
- Coimbra Chemistry Centre Department of Chemistry University of Coimbra Rua Larga 3004-535 Coimbra Portugal
| | - Mariette M. Pereira
- Coimbra Chemistry Centre Department of Chemistry University of Coimbra Rua Larga 3004-535 Coimbra Portugal
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Rh Particles Supported on Sulfated g-C3N4: A Highly Efficient and Recyclable Heterogeneous Catalyst for Alkene Hydroformylation. Catalysts 2020. [DOI: 10.3390/catal10111359] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The hydroformylation of alkenes with CO and H2 to manufacture aldehydes is one of the most large-scale chemical reactions. However, an efficient and recyclable heterogeneous catalyst for alkene hydroformylation is extremely in demand in academia and industry. In this study, a sulfated carbon nitride supported rhodium particle catalyst (Rh/S-g-C3N4) was successfully synthesized via an impregnation-borohydride reduction method and applied in the hydroformylation of alkenes. The catalysts were characterized by XRD, FTIR, SEM, TEM, XPS, and nitrogen adsorption. The influence of the sulfate content, pressure of syngas, temperature, and reaction time, as well as the stability of Rh/S-g-C3N4, on the hydroformylation was examined in detail. The delocalized conjugated structure in g-C3N4 can lead to the formation of electron-deficient aromatic intermediates with alkenes. The sulphate g-C3N4 has a defected surface owing to the formation of oxygen vacancies, which increased the adsorption and dispersion of RhNPs on the surface of g-C3N4. Therefore, Rh/S-g-C3N4 exhibited an outstanding catalytic performance for styrene hydroformylation (TOF = 9000 h−1), the conversion of styrene could reach 99.9%, and the regioselectivity for the branched aldehyde was 52% under the optimized reaction conditions. The catalytic properties of Rh/S-g-C3N4 were also studied in the hydroformylation of various alkenes and displayed an excellent catalytic performance. Furthermore, the reuse of Rh/S-g-C3N4 was tested for five recycling processes, without an obvious decrease in the activity and selectivity under the optimum reaction conditions. These findings demonstrated that Rh/S-g-C3N4 is a potential catalyst for heterogeneous hydroformylation.
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Yentekakis IV, Chu W. Advances in Heterocatalysis by Nanomaterials. NANOMATERIALS 2020; 10:nano10040609. [PMID: 32224925 PMCID: PMC7221995 DOI: 10.3390/nano10040609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/18/2020] [Accepted: 03/24/2020] [Indexed: 11/16/2022]
Affiliation(s)
- Ioannis V. Yentekakis
- Physical Chemistry & Chemical Processes Laboratory, School of Environmental Engineering, Technical University of Crete (TUC), 73100-Chania, Crete, Greece
- Correspondence: ; Tel.: +30-28210-37752
| | - Wei Chu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education (MOE), College of Chemical Engineering, Sichuan University, Sichuan 610065, China
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Preparation and Characterization of Rh/MgSNTs Catalyst for Hydroformylation of Vinyl Acetate: The Rh0 was Obtained by Calcination. Catalysts 2019. [DOI: 10.3390/catal9030215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A simple and practical Rh-catalyzed hydroformylation of vinyl acetate has been synthesized via impregnation-calcination method using silicate nanotubes (MgSNTs) as the supporter. The Rh0 (zero valent state of rhodium) was obtained by calcination. The influence of calcination temperature on catalytic performance of the catalysts was investigated in detail. The catalysts were characterized in detail by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectrometer (XPS), atomic emission spectrometer (ICP), and Brunauer–Emmett–Teller (BET) surface-area analyzers. The Rh/MgSNTs(a2) catalyst shows excellent catalytic activity, selectivity and superior cyclicity. The catalyst could be easily recovered by phase separation and was used up to four times.
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