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Rational design of palladium single-atoms and clusters supported on silicoaluminophosphate-31 by a photochemical route for chemoselective hydrodeoxygenation of vanillin

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Abstract

Chemoselective hydrodeoxygenation of vanillin is of great importance in converting biomass into high value-added chemicals. Herein, we describe a facile photochemical route to access palladium single atoms and clusters supported on silicoaluminophosphate-31 (SAPO-31) as a highly active, chemoselective, and reusable catalyst for hydrodeoxygenation of vanillin. Characterizations by aberration-corrected high-angle annular dark-field scanning transmission electron microscopy, extended X-ray absorption fine structure measurement, and CO-absorbed diffuse reflectance infrared Fourier transform spectroscopy reveal the atomically dispersed palladium single atoms and clusters are loosely bonded and randomly dispersed, without forming strong palladium-palladium metallic bonding, over the SAPO-31 support. This catalyst, with a full metal availability to the reactants, exhibits exceptional catalytic activity (TOF: 3,000 h−1, Yield: > 99%) in the hydrodeoxygenation of vanillin toward 2-methoxy-4-methylphenol (MMP) under mild conditions (1 atm, 80 °C, 30 min), along with excellent stability, scalability (up to 100-fold), and wide substrate scope. The superior catalytic performance can be attributed to the synergistic effect of the positively charged palladium single atoms and fully exposed clusters, as well as the strong metal-support interactions. This work may offer a new avenue for the design and synthesis of fully exposed metal catalysts with targeted functionalities.

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Acknowledgements

The authors greatly acknowledge the financial support from the China Postdoctoral Science Foundation (Nos. 2019M661247 and 2020T130091), Postdoctoral Science Foundation of Heilongjiang Province (LBH-Z19047), Scientific Research Foundation for Returned Scholars of Heilongjiang Province of China (719900091), and Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education.

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  1. Xiaowen Lu and Chunmu Guo contributed equally to this work.

Authors and Affiliations

  1. Joint International Research Laboratory of Advanced Chemical Catalytic Materials & Surface Science, College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, 163318, China

    Xiaowen Lu, Mingyang Zhang, Leipeng Leng, J. Hugh Horton & Zhijun Li

  2. National Center for International Research on Catalytic Technology, School of Chemistry and Material Science, Heilongjiang University, Harbin, 150080, China

    Chunmu Guo & Wei Wu

  3. Department of Chemistry, Queen’s University, Kingston, K7L 3N6, Canada

    J. Hugh Horton

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  1. Xiaowen Lu
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Rational design of palladium single-atoms and clusters supported on silicoaluminophosphate-31 by a photochemical route for chemoselective hydrodeoxygenation of vanillin

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Lu, X., Guo, C., Zhang, M. et al. Rational design of palladium single-atoms and clusters supported on silicoaluminophosphate-31 by a photochemical route for chemoselective hydrodeoxygenation of vanillin. Nano Res. 14, 4347–4355 (2021). https://doi.org/10.1007/s12274-021-3857-2

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