Abstract
The direct conversion of ethanol to 1,1-diethoxyethane (DEE) through one-pot dehydrogenation-acetalization has attracted broad interest from both academia and industry. Based on thermodynamics, the oxidative dehydrogenation of alcohol to acetaldehyde requires high temperature to activate oxygen to realize the C−H cleavage, while the acetalization of acetaldehyde with ethanol is exothermic reversible reaction favorable at low temperature. The mismatching of the reaction condition for the two consecutive steps makes it a great challenge to achieve both high ethanol conversion and high DEE selectivity. This work reports a highly efficient bi-functional catalysis by Bi/BiCeOx for one-pot oxidative dehydrogenation-acetalization route from ethanol to DEE under 150 °C and ambient pressure, affording a selectivity of 98.5% ± 0.5% to DEE at an ethanol conversion of 87.0% ± 1.0%. An efficient tandem catalysis has been achieved on the interfacial Biδ+−Ov−CeIII sites in Bi/BiCeOx established by strong metal-support interaction, in which Biδ+−Ov- sites contribute to the oxidative dehydrogenation of ethanol at mild temperature, and −Ov−CeIII sites to the subsequent acetalization between the generated acetaldehyde and ethanol.
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Acknowledgements
Financial support from the National Natural Science Foundation of China (Nos. 22138001 and 21521005) and the National Key R&D Program of China (No. 2017YFA0206804) is acknowledged. We thank the support of Beijing Engineering Center for Hierarchical Catalysts.
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Low temperature one-pot synthesis of 1,1-diethoxyethane from ethanol on Bi/BiCeOx with strong metal-support interactions
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An, Z., Liu, J., Cao, M. et al. Low temperature one-pot synthesis of 1,1-diethoxyethane from ethanol on Bi/BiCeOx with strong metal-support interactions. Nano Res. 16, 3709–3718 (2023). https://doi.org/10.1007/s12274-022-4848-7
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DOI: https://doi.org/10.1007/s12274-022-4848-7