Exploring novel electrode materials with high rate capability and outstanding cycling stability is an urgent issue for sodium‐ion batteries (SIBs). Herein, Bi2S3 nanorods anchoring on reduced graphene oxide (Bi2S3@rGO composite) are designed and synthesized for sodium storage applications. With the contributions from the unique structure, the surface C—S bonds on rGO, and the synergetic effects from the components, the composite delivers remarkable electrochemical performances. The results indicate that the strategy of chemically constructing a composite structure can be very promising for advanced electrodes of SIBs.
Atomically dispersed metal catalysts show potential advantages in N 2 reduction reaction (NRR) due to their excellent activity and efficient metal utilization. Unfortunately, the reported catalysts usually exhibit unsatisfactory NRR activity due to their poor N 2 adsorption and activation. Herein, we report a novel Sn atomically dispersed protuberance (ADP) by coordination with substrate C and O to induce positive charge accumulation on Sn site for improving its N 2 adsorption, activation and NRR performance. The extended X-ray absorption fine structure (EXAFS) spectra confirmed the local coordination structure of the Sn ADPs. NRR activity was significantly promoted via Sn ADPs, exhibiting a remarkable NH 3 yield (R NH3 ) of 28.3 μg h À 1 mg cat À 1 (7447 μg h À 1 mg Sn À 1) at À 0.3 V. Furthermore, the enhanced N 2 H x intermediates was verified by in situ experiments, yielding consistent results with DFT calculation. This work opens a new avenue to regulate the activity and selectivity of N 2 fixation.
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