首页|Engineering of P vacancies and phosphate on Fe-doped Ni2P nanosheet arrays for enhanced oxygen evolution
Engineering of P vacancies and phosphate on Fe-doped Ni2P nanosheet arrays for enhanced oxygen evolution
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NSTL
Elsevier
? 2022 Elsevier B.V.High-efficient and low-cost oxygen evolution reaction (OER) electrocatalysts are of considerable significance for large-scale electrocatalytic water splitting to produce hydrogen. In this work, we have introduced O2 plasma to engineer Fe-doped Ni2P (Fe-Ni2P) nanosheets, which is grown on the conductive NiFe foam. Interestingly, this facile and rapid plasma treatment can simultaneously achieve defect engineering (P vacancies) and the formation of new species (phosphate). The P vacancies could modulate the electronic structure of the electrocatalyst for the OER process, while the formed phosphate species could facilitate water adsorption and improve the charge transfer. Consequently, the O2-plasma treated Fe-Ni2P nanosheets with rough surface and nanoholes exhibit low overpotentials of 207 and 218 mV at 50 and 100 mA cm?2, small Tafel slope of 45 mV dec?1 and excellent durability in alkaline electrolyte. Our work reveals the delicate structural transformation of the plasma-engineered material, and provides insights of the structure-property relationship of high-performance OER electrocatalyst.
Metal phosphideNanosheetsOxygen evolution reactionPlasma treatmentVacancy
Dong Y.、Chen X.、Yu B.、Zhang W.、Zhu X.、Liu Z.
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School of Materials Science and Engineering Ocean University of China
NSTL
Elsevier
