Photoelectric And Electrocatalytic Properties Of Polymerized Cu Catalyst/Ionic Liquid Modified Anode

At present,the global energy supply is mainly derived from fossil energy.However,with the continuous use of fossil fuels,such resources are increasingly scarce and will cause serious environmental problems,so the demand for clean and sustainable energy is becoming more and more urgent.Hydrogen,as a clean and efficient non-carbon fuel,is one of the most ideal energy carriers.Light and electrocatalytic decomposition of water uses solar energy or electric energy to decompose water into hydrogen and oxygen,which is harmless to the environment and is an important method for generating hydrogen.Therefore,the development of inexpensive and efficient water oxidation catalysts and the exploration of a catalyst-loaded anode and photoanode method are key to converting electrical energy and solar energy into hydrogen energy.In this paper,the polymeric ionic liquid was successfully loaded onto CNTs by?-?interaction,and the two copper molecular catalysts[NMe₄]₂[CuL¹]and[NMe₄]₂[CuL²]were ion exchanged on CNTs.The electrocatalytic performance of the composite anodes CuL¹/PIL/CNTs,CuL²/PIL/CNTs were investigated under alkaline?pH 11.50?conditions.The results show that the current density of 1.40mA/cm² and 1.45 mA/cm² is stable at 1.25 V?vs.NHE?.The initial potential is reduced by 200 mV compared to the unmodified CNTs electrode,and the overpotential of the electrode CuL²/PIL/CNTs is 498 mV,which is lower than the molecular catalysts of the currently reported copper complex.The PIL loading is a"n-type"doping in CNTs,and the synergistic effect between PIL and CNTs significantly enhances the catalytic water oxidation reaction performance of the catalyst.In addition,the copper molecular catalysts were loaded onto the carbon cloth by the same method,and the prepared composite anode CuL²/PIL/CC was excellent in electrocatalytic decomposition water activity and stability.In addition,the molecular copper catalyst[NMe₄]₂[CuL²]was modified onto the yttrium vanadate electrode by polymeric ionic liquid to prepare a CuL²/PIL/BiVO₄ photoanode.Under the condition of simulated sunlight?AM 1.5 G,100 mW/cm²?,when the voltage is 1.23 V?vs.RHE?,the photocurrent density of the composite electrode CuL²/PIL/BiVO₄ reaches 2.09 mA/cm²,which is higher than the current density of[NMe₄]₂[CuL²]directly loaded on the bismuth vanadate electrodewasdoubled.ThemolecularWOC/polymerizedionic liquid/semiconductor composite photoanode has good water oxidation catalytic performance and stability.This paper demonstrates that copper molecular water oxidation catalysts[NMe₄]₂[CuL¹]and[NMe₄]₂[CuL²]have strong stability and photoelectrocatalytic activity by polymeric ionic liquid with carbon-based materials or BiVO₄ to form anodes or photoanodes.It is of great significance for the development of new and efficient molecular catalyst-based electrodes or photoelectrodes.