铁氮改性纳米金刚石的制备及其电化学性能研究  

Preparation of iron-nitrogen modified nano-diamond and study on its electrochemical properties

作　　者：徐子涵 王娟[1] XU Zi-han;WANG Juan(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学化学与化工学院,江苏南京210094

出　　处：《现代化工》2023年第1期157-162,共6页Modern Chemical Industry

基　　金：中央高校基本科研业务费专项资金(30920041108)。

摘　　要：利用爆轰纳米金刚石(ND)导热性极强的特点,将尺寸较小的反应物前驱体分布在ND表面后产生需要的金属盐再进行氮掺杂,成功制备出高效氧还原反应催化剂Fe-NND并应用于锌-空电池。结果表明,其ORR反应过程电子转移数为3.91,起始电位为0.9036 V,电流密度高达5.225 mA/cm^(2),且经过6000圈CV循环其半波电位仅下降26 mV。在锌-空电池上的峰值功率密度为91.81 mW/cm^(2),比容量高达847 mA·h/g。Detonated nano diamond(ND)is a nano carbon material with stable physical and chemical properties formed by sp^(3)hybridization of carbon atoms.Taking advantage of the extremely strong thermal conductivity of ND,the reactant precursor with a smaller size is distributed on the surface of ND to produce the required metal salt,which is then doped to obtain Fe-NND,an oxygen reduction reaction catalyst,which is applied in zinc-air batteries.Experimental characterization test shows that the electron transfer number in the oxygen reduction reaction process is 3.91,the onset potential is 0.9036 V,the current density is as high as 5.225 mA·cm^(-2),and the half-wave potential drops only 26 mV after 6000 CV cycles.In the zinc-air battery,its peak power density is 91.81 mW·cm^(-2),and the specific capacity is as high as 847 mAh·g^(-1).

关 键 词：爆轰纳米金刚石 电催化剂 氧还原反应 铁氮掺杂 锌-空电池 

分 类 号：TQ152[化学工程—电化学工业]