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Single Ru atoms with precise coordination on a monolayer layered double hydroxide for efficient electrooxidation catalysis

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Abstract

The catalytic properties of single-atom catalysts (SACs) can be influenced largely by the chemical environment exerted by supports. Therefore, a precise location of the single atom is essential for understanding of the reaction mechanism and design of novel SACs. However, the preparation of SACs with a precise location remains a great challenge. Herein, we report a facile one-step method to synthesize single Ru atoms supported on a monolayer NiFe-layered double hydroxide (mono-NiFe). Detailed studies demonstrate that the single Ru atoms are not dispersed randomly in the LDH structure, but are uniquely located on the top of the Fe-metal atom of mono-NiFe via three oxygen atoms. Furthermore, these SACs prove to be highly active for the hydrazine electrooxidation reaction. Density functional theory calculations demonstrate that the single Ru atoms can stabilize the hydrazine electrooxidation intermediate with one unpaired electron (*N2H3 and *N2H), thus lowering the reaction barrier for the rate-determining step. Moreover, the loading amount of single Ru atoms with a precise location can even go up to 7.0 wt% without any aggregation.

Graphical abstract: Single Ru atoms with precise coordination on a monolayer layered double hydroxide for efficient electrooxidation catalysis

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Publication details

The article was received on 09 Oct 2018, accepted on 20 Nov 2018 and first published on 20 Nov 2018


Article type: Edge Article
DOI: 10.1039/C8SC04480E
Citation: Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Single Ru atoms with precise coordination on a monolayer layered double hydroxide for efficient electrooxidation catalysis

    Z. Wang, S. Xu, Y. Xu, L. Tan, X. Wang, Y. Zhao, H. Duan and Y. Song, Chem. Sci., 2019, Advance Article , DOI: 10.1039/C8SC04480E

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