Fe掺杂(Ni,Mn)Co_(2)O_(4)纳米棒阵列的制备及其电催化析氧性能研究  

Preparation of Fe⁃doped(Ni,Mn)Co_(2)O_(4)nanorod arrays and study on the performance of electrocatalytic oxygen evolution reaction

作　　者：施华锋 Shi Huafeng(Department of Criminal Investigation,Anhui Police College,Hefei,230031,China)

机构地区：[1]安徽公安学院侦查系,合肥230031

出　　处：《南京大学学报(自然科学版)》2024年第5期815-826,共12页Journal of Nanjing University(Natural Science)

基　　金：安徽省高校自然科学研究重点项目(2022AH052550)

摘　　要：开发低成本、高活性和高稳定性的非贵金属催化剂对电解水析氧反应(OER)具有十分重要的意义.以双金属MnCo为前驱体,K_(3)[Fe(CN)_(6)]为铁源,制备了Fe掺杂的(Ni,Mn)Co_(2)O_(4)二维纳米棒阵列纳米材料.通过采用扫描电镜(SEM)、X射线衍射(XRD)和透射电镜(TEM)分析合成的纳米材料的形貌和结构,并通过电化学工作站研究其析氧性能.实验结果表明,调整铁源的浓度可以调控纳米棒铁的含量,其中Fe掺杂(Ni,Mn)Co_(2)O_(4)-6催化剂在1 mol·L^(-1)KOH电解质中的电解水析氧性能较好,当电流密度为10 mA·cm^(-2)时,过电位仅为242 mV.同时,该催化剂具有优异的稳定性,在100 mA·cm^(-2)电流密度下连续工作155 h,过电位几乎不波动.It is very important to develop non-precious metal catalysts of low cost,high activity and high stability for oxygen evolution of electrolytic water(OER).Fe-doped(Ni,Mn)Co_(2)O_(4) nanorod array was prepared using bimetallic MnCo as precursor and K_(3)[Fe(CN)_(6)]as iron source.The morphology and structure of the as-synthesized nanomaterials were analyzed by scanning electron microscope(SEM),X-ray diffraction(XRD),transmission electron microscopy(TEM)and the oxygen evolution performance was investigated by electrochemical workstation.The results showed that the iron content of(Ni,Mn)Co_(2)O_(4) nanorods could be controlled by adjusting the concentration of the iron source.Fe-doped(Ni,Mn)Co_(2)O_(4)-6 catalyst had better oxygen evolution performance in 1.0 mol·L^(-1) KOH electrolyte,and the overpotential was only 242 mV when the current density was 10 mA·cm^(-2).At the same time,the catalyst had extraordinary stability.After continuously working at the current density of 100 mA·cm^(−2) for 155 h,the overpotential hardly fluctuated.

关 键 词：非贵金属催化剂 纳米材料 析氧反应 掺杂 

分 类 号：O643.36[理学—物理化学] TQ116.21[理学—化学]