Construction of Ni<sub>3</sub>S<sub>2</sub>-Ni<sub>x</sub>P<sub>y</sub>/NF@NiFe LDH with heterogeneous interface to accelerate catalytic kinetics of overall water splitting
Chengdong Han, Zhengtong Ji, Yongfu Zhu, Xue Yao, Peng Chen, Manying Guo, Lijun Zhao, Xingyou Lang, Qing Jiang
Abstract
Reasonable design of a kind of non-noble metal catalyst with high catalytic performance, good stability and low cost is of great significance to realize the overall water splitting. Herein, a bottom-up method is proposed to synthesize NiFe layered double hydroxides (NiFe LDHs) coated sulfide/phosphide heterostructure on the nickel foam (Ni3S2-NixPy/NF@NiFe LDH) through hydrothermal method combined with electrodeposition. Low overpotentials of only 248 and 298 mV are required to achieve the current densities of 50 and 100 mA cm−2 for OER. Meanwhile, the HER performance only needs 137 mV at a current density of 10 mA cm−2.
Topics & Concepts
PhosphideMaterials scienceWater splittingHydrothermal circulationLayered double hydroxidesCatalysisNickel sulfideNickelSulfideCurrent densityHeterojunctionChemical engineeringOverpotentialNanotechnologyMetallurgyOptoelectronicsPhysical chemistryElectrochemistryElectrodeChemistryBiochemistryQuantum mechanicsPhysicsEngineeringPhotocatalysisElectrocatalysts for Energy ConversionAdvanced battery technologies researchSupercapacitor Materials and Fabrication