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通过盐酸多巴胺在含有氯铂酸溶液中聚合,包覆贵金属铂(Pt)单质,搅拌速度控制包覆颗粒的大小,并在氮气保护下高温处理,制得新型催化剂铂碳氮(Pt@CN)。通过扫描电子显微镜(SEM)、X射线光子能谱(XPS)等技术研究了其结构特征,并采用电化学仪器对新型材料在甲醇燃料电池中的应用进行检测。制得的Pt@CN催化剂性能比铂碳(Pt/C)好。Pt@CN、Pt/C的氧化峰位置分别为0.637V和0.665V,Pt@CN的峰位置比Pt/C负移了28mV。Pt@CN、Pt/C的氧化峰位置的电流密度分别为15.5mA和6.09mA,Pt@CN氧化甲醇的电流密度比Pt/C高2.5倍左右。
A new type of catalyst, platinum on carbon (Pt @ CN), was prepared by polymerization of dopamine hydrochloride in a solution containing chloroplatinic acid, coating noble metal platinum (Pt) element, controlling the size of the coated particles with stirring speed and high temperature treatment under nitrogen protection. . The structure characteristics were studied by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and other techniques. The electrochemical instrument was used to detect the application of new materials in methanol fuel cells. The prepared Pt @ CN catalyst performs better than Pt / C catalyst. The peak positions of Pt @ CN and Pt / C were 0.637V and 0.665V, respectively. The peak position of Pt @ CN was shifted by 28mV from Pt / C. The current densities at the oxidation peak positions of Pt @ CN and Pt / C were 15.5 mA and 6.09 mA, respectively, and the current density of Pt @ CN oxidized methanol was about 2.5 times higher than that of Pt / C.