首页|High-performance bifunctional electrocatalysts of CoFe-LDH/NiCo2O4 heterostructure supported on nickel foam for effective overall water splitting
High-performance bifunctional electrocatalysts of CoFe-LDH/NiCo2O4 heterostructure supported on nickel foam for effective overall water splitting
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NSTL
Elsevier
? 2022 Elsevier B.V.Highly efficient bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) have been extensively explored for overall water splitting. Herein, highly efficient bifunctional NiCo2O4-based heterostructure electrocatalysts have been designed by loading different amount of CoFe-layered double hydroxide on the self-supported nickel foam (CoFe-LDH/NCO/NF-1, CoFe-LDH/NCO/NF-2 and CoFe-LDH/NCO/NF-3) by a facile hydrothermal method. The CoFe-LDH/NCO/NF with optimal amount electrocatalyst enable excellent catalytic activity for OER and HER, such as a small of Tafel slope, low overpotential as well as good stability, surpassing RuO2, Pt/C and the majority of other NiCo2O4 based electrocatalysts. The unprecedented electrocatalytic performance is benefiting from high electrochemical active surface areas, fast charge transfer and strong synergistic effect between CoFe-LDH and NiCo2O4. Furthermore, the optimal CoFe-LDH/NCO/NF-1 as anode and cathode delivers a current density of 10 mA cm?2 at a low cell voltage of 1.65 V and presents good durability in long-term stability test for overall water splitting. This work provides an effective strategy for development of highly efficient NiCo2O4-based electrocatalysts for overall water splitting application in the future.
CoFe-LDH/NCO/NF electrocatalystsHER activityOER activityOverall water splitting application
Yao H.、Wang S.、Cao Y.、Lu Z.、Hu J.、Xie J.、Hao A.、Chen R.
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State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of Chemistry Xinjiang University
Department of Industrial and Manufacturing Systems Engineering Kansas State University
NSTL
Elsevier
