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author:

Chai, Y. (Chai, Y..) [1] | Chen, S. (Chen, S..) [2] | Chen, Y. (Chen, Y..) [3] | Wei, F. (Wei, F..) [4] | Cao, L. (Cao, L..) [5] | Lin, J. (Lin, J..) [6] | Li, L. (Li, L..) [7] | Liu, X. (Liu, X..) [8] | Lin, S. (Lin, S..) [9] | Wang, X. (Wang, X..) [10] | Zhang, T. (Zhang, T..) [11]

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Abstract:

Dual-atom catalysts (DACs) with paired active sites can provide unique intrinsic properties for heterogeneous catalysis, but the synergy of the active centers remains to be elucidated. Here, we develop a high-performance DAC with Zn1Co1 species anchored on nitrogen-doped carbon (Zn1Co1/NC) as the dominant active site for the propane dehydrogenation (PDH) reaction. It exhibits several times higher turnover frequency (TOF) of C3H8 conversion and enhanced C3H6 selectivity compared to Zn1/NC or Co1/NC with only a single-atom site. Various experimental and theoretical studies suggest that the enhanced PDH performance stems from the promoted activation of the C-H bond of C3H8 triggered by the electronic interaction between Zn1 and Co1 colligated by N species. Moreover, the dynamic sinking of the Zn1 site and rising of the Co1 site, together with the steric effect of the dissociated H species at the bridged N during the PDH reaction, provides a feasible channel for C3H6 desorption through the more exposed Co1 site, thereby boosting the selectivity. This work provides a promising strategy for designing robust hetero DACs to simultaneously increase activity and selectivity in the PDH reaction. © 2023 American Chemical Society.

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  • [ 1 ] [Chai Y.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • [ 2 ] [Chai Y.]University of Chinese Academy of Sciences, Beijing, 100049, China
  • [ 3 ] [Chen S.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
  • [ 4 ] [Chen Y.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • [ 5 ] [Wei F.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
  • [ 6 ] [Cao L.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • [ 7 ] [Cao L.]University of Chinese Academy of Sciences, Beijing, 100049, China
  • [ 8 ] [Lin J.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • [ 9 ] [Li L.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • [ 10 ] [Liu X.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • [ 11 ] [Lin S.]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, China
  • [ 12 ] [Wang X.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
  • [ 13 ] [Zhang T.]CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China

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Source :

Journal of the American Chemical Society

ISSN: 0002-7863

Year: 2024

Issue: 1

Volume: 146

Page: 263-273

1 4 . 5 0 0

JCR@2023

CAS Journal Grade:1

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 0

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