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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 functionalization of CNTs was carried out by immersion with mixed acid (HNO3-H2SO4). Pt / CNTs nanocatalyst was rapidly synthesized by liquid chemical reduction using chloroplatinic acid (H2PtCl6 · 6H2O) Pt mass fraction of 20%). Transmission electron microscopy (TEM) observation showed that Pt nanoparticles synthesized by this method had small size and narrow size distribution. Pt nanoparticles were highly dispersed on the surface of CNTs with an average diameter of 4.5 nm. The average particle diameter Consistent (4.46 nm). Electrochemical experiments show that the Pt / CNTs catalyst synthesized by this method has higher electrocatalytic activity than methanol on commercial Pt / CNTs catalysts.