Porous Microspherical N and P‐co‐doped NiFe2O4/Single‐Walled Carbon Nanotubes for Efficient Electrochemical Oxygen Evolution Reaction

Abstract The porous microspherical Nitrogen and Phosphorus‐co‐doped NiFe 2 O 4 /Single‐Walled Carbon Nanotubes (NP‐NiFe 2 O 4 /SWNTs) had been fabricated. Nitrogen (N) and phosphorous (P) were co‐doped to increase the active sites. And SWNTs hybrid was to obtain the enhanced conductivity, large specific surface area and more active sites. The hierarchical, porous structure and highly conductive SWNTs enables efficient transport of the electrons generated during oxygen evolution reaction (OER). Thus, NP‐NiFe 2 O 4 /SWNTs was demonstrated as a high‐performance catalyst for OER with a small overpotential of 247 mV at 10 mA cm −2 and low Tafel slope of 83.6 mV dec −1 . The outstanding performance of NP‐NiFe 2 O 4 /SWNTs can also made it serve as anode for water splitting at a cell voltage of 1.595 V, which surpasses the precious RuO 2 and Pt/C.