摘要
采用混酸(HNO3-H2SO4)浸泡法对碳纳米管(CNTs)进行表面功能化,以氯铂酸(H2PtCl6·6H2O)为前躯体,通过液相化学还原法快速合成了Pt/CNTs纳米催化剂(负载Pt的质量分数为20%)。透射电镜(TEM)观察表明,该法合成的Pt纳米粒子粒径小且尺寸分布窄,Pt纳米粒子高度分散在CNTs的表面,其平均粒径为4.5 nm,与XRD表征所计算的平均粒径相符合(4.46 nm)。电化学实验表明,该法合成的Pt/CNTs催化剂比商业Pt/CNTs催化剂对甲醇的电化学催化活性要高。
The surface of carbon nanotubes（ CNTs） was functionalized by immersion method with HNO3-H2SO4. The Pt /CNTs catalysts were rapid prepared from H2PtCl6·6H2O as precursor by a liquid chemical reduction method（ the Pt loading was 20%）. Pt nanoparticles had very small diameters and a sharp particle size distribution. These nanoparticles were highly dispersed on the surface of CNTs with average diameter of 4. 5 nm. The results consistent with XRD characterization of the average particle size（ 4. 46 nm）. Electrochemical measurements showed that the Pt /CNTs nanocatalytic exhibited higher electrocatalytic activity for methanol oxidation than the Pt /MWNTs commercial catalysts.
出处
《化学试剂》
CAS
CSCD
北大核心
2014年第11期1017-1020,共4页
Chemical Reagents
基金
国家自然科学基金资助项目(20773041)
关键词
液相化学还原法
PT纳米粒子
碳纳米管
甲醇电化学氧化
liquid chemical reduction method
Pt nanoparticle
carbon nanotube
methanol electrooxidation
