Study on a new type of spinel heterostructure catalyst and oxygen evolution reaction
In order to improve the electrocatalytic performance of transition metals in alkaline environment and reduce the cost,a novel spinel heterostructure catalyst was synthesized,and the electrocatalytic activity and catalytic mechanism of R-CFO in 1.0 mol/L KOH solution were studied.Using cobalt nitrate,iron nitrate and ruthenium trichloride as raw materials,RuO2@CoFe2O4 new material was prepared.The catalytic activity and mechanism of R-CFO in 1.0 mol/L KOH solution were studied by XRD,TEM,XPS,electrochemical experiments and theoretical calculation.Electrocatalytic experiments show that the overpotential and Tafel slope of the synthesized new catalyst R-CFO only require 215 mV and 50.93 mV/dec when the current density is 10 mA/cm2 under alkaline environment.The current time curve shows that the catalyst is relatively stable.The synthesized R-CFO electrocatalyst showed excellent catalytic performance.Therefore,a promising method is proposed in this paper,which has potential application value for electrocatalysis.