NiFe-LDH@Ni3S2 supported on nickel foam as highly active electrocatalysts for oxygen evolution reaction. (12th January 2023) - Fauzi, Akhmat
Abstract: Interface engineering is an efficient strategy for synthesis of high efficiency catalysts which can combine the advantages of each part for improving the catalytic activity. Herein, we fabricate the heterostructure NiFe-LDH@Ni3 S2 by interface engineering through a simple hydrothermal combined with electrodeposition method. Combining the high conductivity of Ni3 S2 and high intrinsic OER activity of NiFe-LDH at the interface, the NiFe-LDH@Ni3 S2 electrode exhibits a relatively low overpotential of 240 mV for OER at a current density of 200 mA cm −2 which is lower than NiFe-LDH and Ni3 S2 . In addition, the overall water splitting unit provides a potential of 1.47 V at 10 mA cm −2 . Furthermore, after 24 h of electrolysis in 1.0 M KOH, the current density remains 98% of the original value. This work paves a new way for synthesis of more heterostructure catalysts. Highlights: NiFe-LDH@Ni3 S2 was synthesized through hydrothermal and electrodeposition method. NiFe-LDH and Ni3 S2 provide efficient OER activity and conductivity respectively. NiFe-LDH@Ni3 S2 exhibits an advanced overpotential of 240 mV for OER at 200 mA cm -2 . The NiFe-LDH@Ni3 S2 is promising candidate to replace the noble metal based electrocatalysts for water splitting.