3D porous flower-like heterostructure of Fe doped Ni2P nanoparticles anchored on Al2O3 nanosheets as an ultrastable high-efficiency electrocatalyst

Water splitting is a vital candidate to efficiently prepare the green energy resource of hydrogen and solve the problem of energy shortage. Herein, this work firstly study a unique composite of 3D porous flower-like heterostructure of Fe doped Ni2P nanoparticles anchored on Al2O3 nanosheets, which exhibits excellent electrochemical performance for hydrogen evolution reaction (HER) in all-PH medium. In this research, the doped Fe element can tune the electronic structure of Ni2P, which can remarkably improve the electrochemical activity. Besides, this unique 3D porous flower-like heterostructure possesses large specific surface area, which can expose a large number of active sites so as to further enhance the electrochemical property. Moreover, the Al2O3 coating can further ensure the structure stability. The Ni-1.4(Fe-0.6)P@Al2O3 displays splendid catalytic activity for HER with low overpotential of 53 mV and outstanding electrochemical durability of less than 3% increase in overpotential for 500 h at the constant density of 10 mA cm(-2). (c) 2020 Elsevier Ltd. All rights reserved.