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- W4386392554 abstract "Abstract Designing novel single‐atom catalysts (SACs) supports to modulate the electronic structure is crucial to optimize the catalytic activity, but rather challenging. Herein, a general strategy is proposed to utilize the metalloid properties of supports to trap and stabilize single‐atoms with low‐valence states. A series of single‐atoms supported on the surface of tungsten carbide (M‐WC x , M=Ru, Ir, Pd) are rationally developed through a facile pyrolysis method. Benefiting from the metalloid properties of WC x , the single‐atoms exhibit weak coordination with surface W and C atoms, resulting in the formation of low‐valence active centers similar to metals. The unique metal‐metal interaction effectively stabilizes the low‐valence single atoms on the WC x surface and improves the electronic orbital energy level distribution of the active sites. As expected, the representative Ru‐WC x exhibits superior mass activities of 7.84 and 62.52 A mg Ru −1 for the hydrogen oxidation and evolution reactions (HOR/HER), respectively. In‐depth mechanistic analysis demonstrates that an ideal dual‐sites cooperative mechanism achieves a suitable adsorption balance of H ad and OH ad , resulting in an energetically favorable Volmer step. This work offers new guidance for the precise construction of highly active SACs." @default.
- W4386392554 created "2023-09-03" @default.
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- W4386392554 date "2023-09-13" @default.
- W4386392554 modified "2023-10-02" @default.
- W4386392554 title "Stabilizing Low‐Valence Single Atoms by Constructing Metalloid Tungsten Carbide Supports for Efficient Hydrogen Oxidation and Evolution" @default.
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- W4386392554 doi "https://doi.org/10.1002/ange.202311937" @default.
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