一种新型尖晶石异质结构的催化剂及析氧反应的研究

Study on a new type of spinel heterostructure catalyst and oxygen evolution reaction

为提高在碱性环境中的过渡金属的电催化性能并降低使用成本,合成一种新型尖晶石异质结构的催化剂,并研究R-CFO在1.0 mol/L KOH溶液中的电催化活性及其催化机理。以硝酸钴、硝酸铁、三氯化钌为原料,制备出Ru O_(2)@Co Fe_(2)O_(4)新型材料。通过XRD、TEM、XPS、电化学实验和理论计算等方法,研究R-CFO在1.0 mol/L KOH溶液中的催化活性及其催化机理。电催化实验表明,合成的新型催化剂R-CFO在碱性环境下的电流密度为10 m A/cm^(2)时的过电位和Tafel斜率仅仅需要215 m V和50.93 mV/dec,电流-时间变化曲线中表现出催化剂较为稳定,合成的R-CFO电催化剂表现出优异的催化性能。因此,本文提出了一种很有前途的方法,对电催化具有潜在应用价值。

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,RuO_(2)@CoFe_(2)O_(4) 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/cm^(2) 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.