【摘要】 以介孔硅SBA-15为模板,糠醇为碳源制备了高度有序的介孔碳(CMK-5),并用微波法合成碳负载的铂纳米粒子的催化剂.为改善铂微粒的分散性能,在微波碳载过程中添加了适量的阳离子表面活性剂(CTAB).XRD和TEM测试结果表明,CTAB的加入改善了铂催化剂的分散性,且使铂微粒的平均粒径降至2.9nm左右.循环伏安测试结果显示,加入CTAB后所得Pt/CMK-5催化剂的电化学活性面积大于未加CTAB的以及商业JohnsonMatthey公司的Pt/C催化剂的活性面积.更多还原

【Abstract】 Highly ordered mesoporous carbon,denoted as CMK-5,was synthesized by using mesoporous silicates SBA-15 as template and furfuryl alcohol as carbon precursor.Carbon supported platinum nanoparticles were prepared by a microwave-irradiated polyol process.In order to improve the dispersity of Pt nanoparticles,cationic surfactant(CTAB)as stabilizer was added to the microwave heating process.X-ray diffraction(XRD)and transmission electron microscopy(TEM)images showed that the dispersity of Pt nanoparticles was improved and the particle size of the catalyst was decreased to 2.9 nm with addition of cationic surfactant(CTAB).Cyclic voltammograms showed that the CTAB-stabilized Pt/CMK-5 catalyst exhibited a higher catalytic activity than the catalyst without CTAB or the commercial JM Pt/C catalyst.更多还原