NiFe-LDH coated NiSe/Ni foam as a bifunctional electrocatalyst for overall water splitting

• Published in: Reaction chemistry & engineering Vol. 8; no. 7; pp. 1711 - 1718
• Main Authors: Wu, Wentong, Min, Boya, Li, Hanbing, Liu, Feng, Zheng, Mingsheng, Ding, Kunpeng, Lu, Shijian, Liu, Maochang
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 27.06.2023
• Subjects: Charge transfer; Corrosion resistance; Electrical resistivity; Electrocatalysts; Heterostructures; Hydrogen evolution reactions; Hydrogen production; Hydroxides; Intermetallic compounds; Iron compounds; Metal foams; Nickel compounds; Noble metals; Oxygen evolution reactions; Water splitting
• ISSN: 2058-9883; 2058-9883
• DOI: 10.1039/d3re00004d

Electrocatalytic water splitting is promising for renewable hydrogen production, yet relies on the development of a highly active and stable electrocatalyst. Herein, we report the construction of a bifunctional heterostructure electrocatalyst in the form of NiFe layered double hydroxide coated NiSe/Ni foam (NiSe@NiFe-LDH/NF) for efficient electrocatalytic water splitting. Benefiting from the superior electrical conductivity and high specific surface area of NiSe, the high active site density of NiFe-LDH, the fast charge transfer rate at a tight interface, and the strong corrosion resistance of the shell layer, NiSe@NiFe-LDH/NF exhibited excellent electrocatalytic activity and stability towards the oxygen evolution reaction (209 mV@10 mA cm −2 , 241 mV@100 mA cm −2 ), hydrogen evolution reaction (93 mV@10 mA cm −2 , 213 mV@100 mA cm −2 ), and overall water splitting (1.560 V@10 mA cm −2 ) in 1 M KOH electrolyte. This work thus provides new insights into the design of more efficient and stable bifunctional non-noble metal electrocatalysts. A bifunctional non-noble electrocatalyst NiSe@NiFe-LDH/NF was developed to provide new insights into the development of renewable hydrogen energy.