ABSTRACT The ion beam-induced defects in carbon supports for platinum (Pt) nanoparticles have been found to enhance the catalytic activity. Highly oriented pyrolytic graphite (HOPG) was irradiated with 380 keV argon ions (Ar), and Pt nanoparticles were then deposited on it by a radio frequency (rf) magnetron sputtering method. The Pt nanoparticle size on Ar-irradiated HOPG and the carbon structure at the interface were investigated by transmission electron microscope (TEM) and Raman spectroscopy, respectively. The observed size of Pt nanoparticles on the irradiated HOPG was larger than that on the non-irradiated HOPG. Raman spectra indicated that vacancy-like defects were formed on the HOPG surface by Ar-irradiation at the fluences between and ions/cm, and sp defects were induced by irradiation more than ions/cm. These defective structures on the HOPG would promote the Pt particle growth.

中文翻译：

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通过 380 keV Ar+ 辐照改性的 HOPG 表面上的铂纳米粒子：TEM 和拉曼研究

摘要 已发现铂 (Pt) 纳米粒子的碳载体中的离子束诱导缺陷可提高催化活性。用 380 keV 的氩离子 (Ar) 辐照高度取向的热解石墨 (HOPG)，然后通过射频 (rf) 磁控溅射方法在其上沉积 Pt 纳米颗粒。分别通过透射电子显微镜 (TEM) 和拉曼光谱研究了 Ar 照射的 HOPG 上的 Pt 纳米颗粒尺寸和界面处的碳结构。在辐照的 HOPG 上观察到的 Pt 纳米粒子的尺寸大于未辐照的 HOPG 上的尺寸。拉曼光谱表明，在 和 离子/cm 之间的通量下，Ar 辐照在 HOPG 表面上形成了空位状缺陷，并且辐照超过 ions/cm 时会诱发 sp 缺陷。