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. 2022 Dec 23;61(52):e202215157.
doi: 10.1002/anie.202215157. Epub 2022 Nov 29.

Catalytically Stable Potassium Single-Atom Solid Superbases

Song-Song Peng  1 , Xiang-Bin Shao  1 , Meng-Xuan Gu  1 , Guo-Song Zhang  1 , Chen Gu  1 , Yao Nian  2 , Yiming Jia  2 , You Han  2   3 , Xiao-Qin Liu  1 , Lin-Bing Sun  1
Affiliations

Catalytically Stable Potassium Single-Atom Solid Superbases

Song-Song Peng et al. Angew Chem Int Ed Engl. .

Abstract

Solid superbases can catalyze diverse reactions under mild conditions, while they suffer from aggregation of basic sites and poor stability during recycling. Here we report a new generation of solid superbases derived from K single atoms (SAs) prepared by a tandem redox strategy. The initial redox reaction takes place between base precursor KNO3 and graphene support, producing K2 O at 400 °C. Further increasing the temperature to 800 °C, the graphene reduces K2 O to K anchored by its vacancies, leading to the generation of K SAs (denoted as K1 /G). The source of basicity in the K1 /G is K SAs, and neighboring single atoms (NSAs) possess superbasicity, which is different from conventional basicity originated from oxygen and nitrogen atoms. Due to the superbasicity as well as high dispersion and anchoring of basic sites, the K1 /G shows excellent catalytic activity and stability in transesterification reaction, which is much superior to the reported catalysts.

Keywords: Basicity; Single Atoms; Solid Bases; Stability; Transesterification.

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References

    1. None
    1. X. Cui, W. Li, P. Ryabchuk, K. Junge, M. Beller, Nat. Catal. 2018, 1, 385-397;
    1. S. K. Kaiser, Z. Chen, D. Faust Akl, S. Mitchell, J. Perez-Ramirez, Chem. Rev. 2020, 120, 11703-11809;
    1. D. Wang, S. Li, C. Wu, T. Li, J. Am. Chem. Soc. 2022, 144, 685-689;
    1. Y. Lu, J. Wang, L. Yu, L. Kovarik, X. Zhang, A. S. Hoffman, A. Gallo, S. R. Bare, D. Sokaras, T. Kroll, Nat. Catal. 2019, 2, 149-156;

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