Ping Lu ^a,b, Haixia Zhao ^c, Xinyuan Jiang ^a, Lishang Yang ^a, Guangwen Xie ^a, Tian Xie ^c,*, Luhua Jiang ^a

^a College of Materials Science and Engineering, Qingdao University of Science and Technology, No.53 Zhengzhou Road, Qingdao, Shandong 266042, PR China

^b College of Environmental Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao, Shandong 266071, PR China

^c College of Electromechanical Engineering, Qingdao University of Science and Technology, No.99 Songling Road, Qingdao, Shandong 260061, PR China

Heterogeneous structure supported Ni-Fe-P-Ni(OH)2/NF catalysts were fabricated by electroless deposition. The as-prepared composite catalyst exhibits remarkable electrocatalytic properties towards the hydrogen evolution reaction, requiring a low overpotential of 201 mV at a current density of 100 mA cm-2. Notably, the Ni-Fe-P-Ni (OH)2/NF also demonstrates exceptional oxygen evolution performance, achieving a current density of 100 mA cm-2 with only 294 mV overpotential. Moreover, its performance in overall water splitting, serving as both a cathode and an anode, showcases a significantly low overpotential of 1.51 V at a current density of 10 mA cm-2. Following a 24-hour chronopotentiometry stability test at a current density of 50 mA cm-2, the dual electrodes maintain excellent performance for overall water splitting. This work provides a feasible method for the research and development of efficient and stable overall water splitting catalysts.

https://doi.org/10.1016/j.jece.2024.114039