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- W4364361121 endingPage "142920" @default.
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- W4364361121 abstract "Metal single-atom catalysts (SACs) have great potential to replace traditional nanoparticle catalysts in practical applications, however, the task-specific construction of SACs containing metal–nitrogen (M−N) moiety with tunable M−N coordination number remains a colossal challenging issue. Herein, we report a facile strategy to modulate the s-band of Zn by constructing N-coordinated Zn SACs (denoted as Zn–N–C–T, T stands for the pyrolysis temperature) with tunable nitrogen coordination number (denoted as Zn–Nx, x = 2, 3, and 4) and Zn loadings (ranging from 0.8 to 6.8% by weight) via a metal–organic framework-mediated pyrolysis method. The catalytic activity of Zn–N–C–T is found to be closely related to the coordination number of Zn single atomic sites for the transfer hydrogenation of nitroarene to arylamine, using hydrazine hydrate as a hydrogen source under environmental benign conditions, among which the under-coordinated Zn–N3 with defect and asymmetric electron distribution in Zn–N–C–1223 exhibits the best catalytic activity, followed by lower-coordinated Zn–N2 with defect in Zn–N–C–1273 and saturated coordination Zn–N4 in Zn–N–C–1123. Experimental results and theoretical analysis uncover that appropriately lowering the coordination number increases the electron density of Zn single atoms and simultaneously introduces H-acceptor sites, which cooperatively contribute to the enhancement of the performance for transfer hydrogenation." @default.
- W4364361121 created "2023-04-12" @default.
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- W4364361121 date "2023-06-01" @default.
- W4364361121 modified "2023-10-15" @default.
- W4364361121 title "Coordination number engineering of Zn single-atom sites for enhanced transfer hydrogenation performance" @default.
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- W4364361121 doi "https://doi.org/10.1016/j.cej.2023.142920" @default.
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