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Confined-interface-directed synthesis of Palladium single-atom catalysts on graphene/amorphous carbon

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Authors:
  • Xi, Jiangbo ;
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    Huazhong University of Science and Technology
  • Sun, Hongyu ;
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    Department of Micro- and Nanotechnology, Technical University of Denmark
  • Zhang, Zheye ;
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    Huazhong University of Science and Technology
  • Duan, Xianming ;
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    Huazhong University of Science and Technology
  • Xiao, Junwu ;
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    Huazhong University of Science and Technology
  • Xiao, Fei ;
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    Huazhong University of Science and Technology
  • Liu, Limin ;
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    Beijing Computational Science Research Center
  • Wang, Shuai
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    Huazhong University of Science and Technology
DOI:
10.1016/j.apcatb.2017.11.057
Abstract:
The maximized atomic efficiency of supported catalysts is highly desired in heterogeneous catalysis. Therefore, the design and development of active, stable, and atomic metal-based catalysts remains a formidable challenge. To tackle these problems, it is necessary to investigate the interaction between single atoms and supports. Theoretical calculations indicate that the Pd binding strength is higher on graphene/amorphous carbon (AC) than that on graphene or AC substrate. Based on these predictions, we present a facile confined-interface-directed synthesis route for the preparation of single-atom catalysts (SACs) in which Pd atoms are well-dispersed on the interface of double-shelled hollow carbon nanospheres with reduced graphene oxide (RGO) as the inner shell and AC as the outer shell. Owing to the synergetic effect of the RGO/AC confined interface and the atomically dispersed Pd, the as-made RGO@AC/Pd SAC achieves the maximum atomic efficiency (catalytic activity) of Pd species and exhibits an excellent stability in chemical catalysis. This confined-interface-directed synthesis method provides a novel direction to maximize the atomic efficiency, improve the activity, and enhance the stability of metal-based catalysts.
Type:
Journal article
Language:
English
Published in:
Applied Catalysis B: Environmental, 2018, Vol 225, p. 291-297
Keywords:
Single-atom catalyst; Graphene; Amorphous carbon; Confined-interface-directed synthesis; Chemical catalysis
Main Research Area:
Science/technology
Submission year:
2018
ID:
2393782927

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