Co_(3)O_(4)/CNT复合结构热制备方法与电催化性能研究  

Thermal Preparation Method and Electrocatalytic Performance Study of Co_(3)O_(4)/CNT Composite

作　　者：王建全 李保霞 刘徐 付晓丽 WANG Jianquan;LI Baoxia;LIU Xu;FU Xiaoli

机构地区：[1]四川经科企业管理服务有限公司,四川遂宁629000

出　　处：《化工设计通讯》2024年第3期10-13,22,共5页Chemical Engineering Design Communications

摘　　要：利用火焰法一步原位生成附着在泡沫镍上Co_(3)O_(4)修饰的碳纳米管(Co_(3)O_(4)/CNT/NF)。该方法仅需数十秒的反应时间,大大减少了制备时间。所得复合材料中泡沫镍骨架为导电基底,互相搭接、连接的碳纳米管无需黏接剂辅助附着于泡沫镍骨架的表面,形成良好的导电通道和巨大的比表面积。活性纳米颗粒Co_(3)O_(4)均匀地分散在碳纳米管中。作为电催化电极,这种结构既保证良好的电子电导率,又暴露出催化剂材料大量的活性位点,促进其电催化性能的提升。结果显示,该电极材料双电层电容为34.1 mF cm^(-2),析氧反应(OER)中的过电位为288 mV@10 mA cm^(-2)和372 mV@100 mA cm^(-2),优于商用RuO_(2)催化剂。在全水解过程中,仅需要1.722 V的电位就可以达到10 mA cm^(-2)。Co_(3)O_(4)-modified carbon nanotubes attached on nickel foam(Co_(3)O_(4)/CNT/NF)were prepared viaflame method.This process only takes tens of seconds,reducing the synthesis time greatly.In the resulting composite,skeletons of nickel foam were used as the conductive substrate,and the interlocking and connected carbon nanotubes(CNTs)attached on the surface of the nickel foam forms good conductive channels and a huge specific surface area.The reactive nanoparticles Co_(3)O_(4) are uniformly dispersed in the CNTs.As an electrocatalytic electrode,this structure both ensures good electronic conductivity and exposes a large number of active sites of the catalyst material,promoting its electrocatalytic performance.The results show that the bilayer capacitance of this electrode material is 34.1 mF cm^(-2),and the overpotentials in oxygen evolution reaction(OER)are288 mV@10 mAcm and 372 mV@100 mAcm^(-2),respectively,which are superior than those of commercial RuO_(2) catalysts.A potential of only-21.722V is required to reach 10 mA cm during full hydrolysis.

关 键 词：火焰法 双功能催化剂 碳纳米管 四氧化三钴 电解水 

分 类 号：TQ116.21[化学工程—无机化工]