MOFs derived FeNi_(3) nanoparticles decorated hollow N-doped carbon rod for high-performance oxygen evolution reaction

摘要

The sluggish electrochemical oxygen evolution reaction(OER) is a crucial process for clean energy conversion technology.The preparation of non-precious electrocatalysts with high performance for OER is still a main challenge.Herein,we report a FeNi_(3) nanoparticles incorporated on N-doped hollow carbon rod with extraordinary performance toward OER by in situ annealing the Ni-doped Fe based metal-organic frameworks(MOFs) precursors.Meanwhile,the pristine N atoms of MOFs doped into carbon frameworks can enhance the electrical conductivity,boost electron mass transport and electron transfer,and construct more active sites.Furthermore,constructing the Fe-Ni alloy structure can facilitate the formation of O-O bond,optimize the free energy for intermediate adsorption and improve OER performance.The as-prepared Fe-Ni bimetal decorated hollow N-doped nanocarbon hybrid structure possesses superior OER performance,which is surpass commercial IrO_(2) at a overpotential of only 340 mV to achieve the current density of 10 mA cm^(-2),as well as a small Tafel slope of 86.67 mV dec^(-1) in alkaline electrolyte.The Fe-Ni alloy/hollow N-doped nanocarbon hybrid structure shining the bright future for obtaining earth-abundant and superior efficient anode OER electrocatalyst.