Abstract
Achieving the regioselective hydroformylation of linear α-olefins to linear aldehydes using solid catalysts with regioselectivities comparable to the corresponding homogeneous process is a great challenge in the chemical industry. Despite the tremendous efforts devoted to this research topic, most of the reported heterogeneous metal catalysts still give considerably lower regioselectivities than well-established homogeneous metal catalysts. Here we show the design of efficient Rh-zeolite catalysts, in which subnanometre Rh clusters are selectively confined in the sinusoidal ten-membered-ring channels of MFI zeolite, for the hydroformylation of long-chain linear α-olefins (C6–C12) into linear aldehydes with very high linear-to-branched aldehyde ratios (up to 400). The exceptional catalytic performances result from the involvement of the MFI zeolite framework as a rigid solid ligand that accommodates subnanometre Rh clusters in the sinusoidal channels of the MFI zeolite.
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Data availability
The data that support the findings of this study are available within the Article and Supplementary Information or from the corresponding authors upon reasonable request. The optimized structures of all reaction intermediates and transition states derived from theoretical calculations are provided as Supplementary Data.
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Acknowledgements
L.L. is grateful for the financial support from the National Natural Science Foundation of China (22272087), Tsinghua University (Initiative Scientific Research Program (20233080016), the International Joint Mission on Climate Change and Carbon Neutrality (20233080033), the Dushi Program (20231080010)) and the National Key R&D Program of China (2022YFA1503901). Z.C. acknowledges the National Natural Science Foundation of China (numbers 21972161 and 22172186), the Autonomous Research Project of the State Key Laboratory of Coal Conversion (number 2022BWZ009), the Inner Mengolia Science & Technology Project Plan (number 2021GG0311), the Major Science and Technology Project of Ordos (2022EEDSKJZDZX001), the Institute of Coal Chemistry, Chinese Academy of Sciences and Synfuels China, Co., Ltd for financial support. L.Z acknowledges the National Natural Science Foundation of China (22103047) and the Young Scholars Program from the School of Vehicle and Mobility of Tsinghua University. M.L.-H. is grateful for financial support from MCIN/AEI/10.13039/501100011033 (PID2019-110018GA-I00) and the support from the DME-UCA Node of the Spanish Singular Infrastructure for Electron Microscopy of Materials (ICTS ELECMI). The in situ XAS experiments were performed at the CLÆSS (BL22) beamline of ALBA Synchrotron with collaboration of the ALBA staff. This research used resources of the Advanced Photon Source, an Office of Science User Facility operated for the US Department of Energy Office of Science by Argonne National Laboratory, and was supported by the US Department of Energy under contract number DE-AC02-06CH11357, as well as the Canadian Light Source and its funding partners. We thank R. Zong for his help in the electron microscopy characterization of the Rh-zeolite catalysts at Tsinghua University.
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Contributions
L.L. and Z.C. conceived the project. L.Z. designed the theoretical studies. X.D. carried out the materials synthesis and part of the structural characterization. T.Y. performed the hydroformylation reaction tests and data analyses. L.Q. performed the theoretical calculations. H.H. conducted the in situ infrared and XPS investigations and helped with analysis of the obtained XAS data. M.L.-H. characterized the Rh-MFI catalysts using the iDPC-STEM imaging technique and carried out the image simulations. L.L. analysed the iDPC-STEM images. C.M. and G.A. measured the Rh-zeolite materials via in situ XAS and analysed the data. D.M.M. contributed to the spectroscopic characterization of the Rh-zeolite materials via XAS. X.Z. participated in the catalytic studies and data analysis. L.L., Z.C. and L.Z. wrote the manuscript with input from all of the other authors.
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Supplementary Figs. 1–50, Tables 1–26, Notes 1–7 and refs. 1–94.
Supplementary Data
Optimized structures of all reaction intermediates and transition states derived from theoretical calculations.
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Dou, X., Yan, T., Qian, L. et al. Regioselective hydroformylation with subnanometre Rh clusters in MFI zeolite. Nat Catal (2024). https://doi.org/10.1038/s41929-024-01155-y
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DOI: https://doi.org/10.1038/s41929-024-01155-y