Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 919, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.165855
Keywords
Composite materials; Electrodeposition; Oxygen evolution reaction; Heterojunctions; Electrocatalyst
Categories
Funding
- Natural Science Foundation of Anhui Provincial Education Department [KJ2020ZD05]
- National College Students Innovation and Entrepreneurship Training Program [202010370160]
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Fe-Ni3S2 @ NiFe LDH catalyst with abundant electroactive sites and superior OER performance is successfully synthesized through a simple method, providing a feasible approach for the design of highly efficient earth-abundant nonprecious metal electrocatalysts for OER.
The design and synthesis of efficient and earth-abundant nonprecious metal electrocatalyst for oxygen evolution reaction (OER) plays a vital role in electrocatalytic water splitting. Here, amorphous NiFe layered double hydroxide (LDH) nanosheets deposited on Fe doped Ni3S2 nano-ridges (Fe-Ni3S2 @NiFe LDH) are successfully synthesized through a simple hydrothermal-electrodeposition method and are applied as OER electrocatalysts. In addition, benefiting from the abundant electroactive sites, electronic effect induced by Fe-doping and synergistic effect between NiFe LDH and Fe-Ni3S2, the as-prepared Fe-Ni3S2 @NiFe LDH heterogeneous catalyst can exhibit excellent OER performance in 1.0 M KOH solution. Fe-Ni3S2 @NiFe LDH only reach an overpotential of 192 mV at the current density of 10 mA cm(-2) with a Tafel slope of 43.1 mV dec(-1). Notably, as-obtained Fe-Ni3S2 @NiFe LDH electrocatalyst only requires a low overpotential of 217 mV to achieve a current density of 50 mA cm(-2). And Fe-Ni3S2 @NiFe LDH also exhibits excellent durability at 50 mA cm(-2) in 1.0 M KOH at room temperature. This study provides a feasible approach for the design of highly efficient earth-abundant nonprecious metal electrocatalysts for OER. (c) 2022 Elsevier B.V. All rights reserved.
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