Interface engineering induced NiFe/Ni-Mo-S@CC heterostructure with excellent OER and HER performance

• Published in: Ionics Vol. 29; no. 11; pp. 4787 - 4796
• Main Authors: Gong, Zhangquan, Cheng, Wentao, Fang, Zheng, Li, Na, Qin, Yanmin, Wang, Xing, Bao, Haifeng
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2023; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrocatalysts; Electrochemistry; Energy Storage; Heterostructures; Hydrogen evolution reactions; Hydrogen production; Intermetallic compounds; Iron compounds; Molybdenum; Nanoalloys; Nanoparticles; Nickel base alloys; Nickel compounds; Noble metals; Optical and Electronic Materials; Oxygen evolution reactions; Renewable and Green Energy; Synergistic effect; Water splitting; Heterostructure; Transition metal sulfide; Synergistic effect; Overall water splitting
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-023-05190-w

The development of high-efficiency, low-cost and stable noble-metal-free electrocatalysts for water splitting is essential for the sustainable production of hydrogen. Herein, hierarchical Ni-Mo-S nanosheet decorated by NiFe alloy nanoparticle grown on carbon cloth (NiFe/Ni-Mo-S@CC) is designed as bifunctional electrocatalyst for overall water splitting. Benefiting from the strong synergistic effect between NiFe alloy and Ni-Mo-S, the NiFe/Ni-Mo-S@CC heterostructure exhibits superior electrocatalytic activity with extremely low overpotentials of 161 mV for oxygen evolution reaction (OER) at 10 mA cm −2 and 72 mV for hydrogen evolution reaction (HER) at 10 mA cm −2 , respectively. In addition, the alkaline electrolyzer with NiFe/Ni-Mo-S@CC as both cathode and anode yield a low cell voltage of only 1.49 V to reach the current density of 10 mA cm −2 . The formation of NiFe/Ni-Mo-S@CC heterostructure provides an efficient way to develop catalysts for water splitting.