Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (11): 1679-1685.DOI: 10.1016/S1872-2067(19)63316-4

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Zinc single atoms on N-doped carbon: An efficient and stable catalyst for CO2 fixation and conversion

Xinjiang Cuia, Xingchao Daib, Annette-Enrica Surkusa, Kathrin Jungea, Carsten Kreyenschultea, Giovanni Agostinia, Nils Rockstroha, Matthias Bellera   

  1. a Leibniz-Institut für Katalyse e.V. Albert-Einstein-Str. 29a, 18059 Rostock, Germany;
    b State Key Laboratory for Oxo Synthesis and Selective Oxidation, Centre for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China
  • Received:2019-01-21 Revised:2019-01-27 Online:2019-11-18 Published:2019-09-06
  • Contact: Matthias Beller
  • Supported by:
    This work was supported by the National Key R&D Program of China (2017YFA0403103), the state of Mecklenburg-Vorpommern and the Bundesministerium für Bildung und Forschung.

Abstract: The cycloaddition of epoxides and carbon dioxide represents a straightforward and atom-efficient method for synthesis of cyclic carbonates and utilization of CO2. So far, homogeneous metal complexes have been mainly applied for such transformations. Here, we describe the synthesis of novel heterogeneous Zn-based catalysts, which were conveniently prepared by pyrolysis of an active-carbon-supported phenanthroline-ligated Zn(OAc)2 complex. Detail structural characterizations proved the existence of single zinc sites in the active material. Compared to a Zn-based nanoparticle (Zn-NP) catalyst, the resulting single metal atom catalyst (SAC) displayed improved activity and stability for the cycloaddition of epoxides. By applying the optimal catalyst, a variety of carbonates were successfully obtained in high yields with good functional group tolerance.

Key words: Heterogeneous catalysis, Single atom catalyst, Zinc, Carbon dioxide, Cycloaddition, Carbonate