التفاصيل البيبلوغرافية
| العنوان: |
Multivalent cation-modified NixSy for highly efficient and stable oxygen evolution electrocatalysis. |
| المؤلفون: |
Yuan, Wei1 (AUTHOR), Wu, Jicheng2 (AUTHOR), Jiang, Guojian3 (AUTHOR) guojianjiang@sit.edu.cn, Wu, Dandan4 (AUTHOR) wdan1008@163.com, Xu, Xiaowei5 (AUTHOR), Chang, Shufang6 (AUTHOR) |
| المصدر: |
New Journal of Chemistry. 5/7/2024, Vol. 48 Issue 17, p7895-7903. 9p. |
| مصطلحات موضوعية: |
*OXYGEN evolution reactions, *ELECTROCATALYSIS, *ELECTRIC conductivity, *LAYERED double hydroxides, *CHARGE exchange, *ELECTRONIC structure |
| People: |
NI Ni |
| مستخلص: |
Developing highly efficient and stable non-precious metal electrocatalysts for the oxygen evolution reaction (OER) is an ongoing challenge due to the sluggish kinetics of the OER. In this study, the (Ni,Fe,V)3S4–NiS nanoheterostructure rich in Ni3+ was obtained by sulfidizing the NiFeV layered double hydroxide hydrogen precursor. The introduction of Fe and V effectively modified the electronic structure of NixSy and increased the content of Ni3+, which was conducive to enhancing the chemisorption of OH− and promoting the transfer of electrons to the surface during the OER process. At the same time, the self-supporting porous structure, the unique metallic characteristics of NixSy (continuous Ni–Ni bonds) and excellent electrical conductivity can facilitate electrolyte diffusion and bubble release. The designed (Ni,Fe,V)3S4–NiS/NF electrode shows excellent electrocatalytic OER performance with an overpotential of 236 mV at a current density of 10 mA cm−2, ultra-low Tafel slope (53.7 mV dec−1) and excellent long-term stability. Therefore, this work offers a simple strategy to design an efficient Ni based OER electrocatalyst enriched with Ni3+ sites by co-doping high-valence ions. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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