摘要
The construction of rich phase interfaces to increase active reaction area in hybrid materials is an excellent strategy to improve electrochemical performance.Under this guideline,MIL-101@OX-metal organic framework(MOF)is constructed by the"MOF on MOF"method,then converts to MIL-101@NiFe-layered double hydroxides(LDH)by in situ transformation in alkaline solution.MIL-101@NiFe-LDH shows excellent electrochemical water oxidation performance.It needs only an overpotential of 215 m V to drive10 m A/cm^(2)of oxygen evolution reaction(OER),which is less than that of NiFe-LDH,MIL-101.In addition,MIL-101@NiFe-LDH has the smallest Tafel slope(55.1 mV/dec)compared with Ni Fe-LDH(61.1 m V/dec),MIL-101(150.8 m V/dec).The excellent water oxidation activity is due to the high phase interfaces derived from high specific surface area of MOF.This work offers an alternative method for making MOF/LDH heterostructures with an optimized phase interfaces and provides new insights for OER.
基金
financially supported by the National Natural Science Foundation of China(No.21808189)
the National Natural Science Foundation of Gansu(No.20JR5RA523)
the Young Teachers’Research Ability Improvement Project of Northwest Normal University(NWNU-LKQN2020-01)。
