Study On Iron Oxide-based Composite Array Electrode And Its Electrocatalytic Performance

As an efficient and environmentally friendly green energy,hydrogen has great research value and significance in contemporary society facing energy shortages and environmental damage.Electrocatalytic hydrogen production technology is the technology with the highest atomic utilization rate among all hydrogen production technologies and the most environmentally friendly and sustainable technology.Due to the low redox potential,Fe₂O₃is theoretically an ideal electrocatalyst material.However,due to the low conductivity and excessively high driving potential as the main obstacles to practical applications,this thesis is committed to develop highly active Fe₂O₃composites by adjusting the morphology of nanostructures and constructing heterostructures,and systematically studied the structural characteristics and electrocatalytic performance.The main content includes the following two parts:（1）Theα-Fe₂O₃nanorod array was obtained on the carbon cloth substrate by hydrothermal post-annealing treatment,and then Cu₂O nanoparticles were grown on the surface of theα-Fe₂O₃nanorod array by the constant voltage electrodeposition method to obtain Cu₂O@α-Fe₂O₃@CC heterostructure.The results showed that when the catalyst reached a current density of 10 m A·cm^-2,only an overpotential of296 mV was required,and the Tafel slope was 66 m V.dec^-1,showing relatively excellent electrochemical performance,after stability test,the composite material shows good electrochemical stability.（2）On the basis of theα-Fe₂O₃nanorod array prepared in Work 1,ZIF nanoparticles of Co Cu bimetal were loaded on theα-Fe₂O₃nanorod array by self-assembly method.The experimental results proved that when the ratio of bimetal reached a certain After the value,it can show excellent catalytic activity,only 272 mV can reach a current density of 10 mA·cm^-2,and the stability test shows that the catalyst has excellent electrocatalytic stability.