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- W4308489233 abstract "Combining catalytic active materials with nitrogen-doped carbon structure has been an effective strategy for designing high-performance electrocatalysts, where N species plays a vital role in modulating the electronic structure of composite material. The N dopant in the carbon structure exists in different states, but it has been ambiguous which type of N structure contributes the most to the overall catalytic activity. Here, Fe3C nanoparticles embedded in graphitic nitrogen-dominated carbon framework (Fe3[email protected]) has been successfully fabricated from [email protected] and exhibits excellent oxygen reduction reaction (ORR) activity and stability. Experiments and theoretical calculations confirm the interaction between Fe3C and N-doped carbon. Moreover, graphitic nitrogen is proved to exhibit the highest promotion contribution among different N states, which can effectively reduce the energy barrier of the potential determining step (from O2 to ∗OOH) for ORR. The Fe3[email protected] composite is applied as the air cathode in a Zn-air battery, which shows a high EOCV (open-circuit voltage) of 1.48 V, a power density of 155.6 mW/cm2, and a specific capacity of 798 mAh/gZn. This work suggests the synergy of Fe3C, N species, and carbon layer in promoting the performance of ORR catalysts." @default.
- W4308489233 created "2022-11-12" @default.
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- W4308489233 date "2023-01-01" @default.
- W4308489233 modified "2023-10-17" @default.
- W4308489233 title "Graphitic-nitrogen-enriched carbon skeleton with embedment of Fe3C for superior performance air cathode in zinc-air battery" @default.
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- W4308489233 doi "https://doi.org/10.1016/j.mtener.2022.101194" @default.
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