Center for Materials Characterization, National Chemical Laboratory, Pune, India.
J Colloid Interface Sci. 2011 Jun 1;358(1):238-44. doi: 10.1016/j.jcis.2011.02.065. Epub 2011 Mar 6.
Nearly monodisperse rhodium nanoparticles with adsorbed NH(x) were synthesized at the CCl(4)-water interface. The presence of NH(x)-adsorbed species was confirmed by energy-dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS) studies. The synthesis of controlled size 2-38 nm rhodium particles was studied as a function of reducing agent concentration by transmission electron microscopy (TEM). HRTEM confirmed the formation of rhodium nanoparticles having fringe spacing consistent with reported Rh (111) planes. The continuity of these films over an area of 1×1 μm was revealed by atomic force microscopy (AFM) studies. The electrocatalytic application of these nanostructure Rh-NH(x) thin films for formaldehyde oxidation in 0.5M NaOH was investigated by cyclic voltammetry. The Rh nanoparticles formed by the present strategy are expected to be useful for other catalytic applications also.
在 CCl(4)-水界面上合成了具有吸附 NH(x)的近乎单分散的铑纳米粒子。通过能谱分析（EDX）和 X 射线光电子能谱（XPS）研究证实了 NH(x)-吸附物种的存在。通过透射电子显微镜（TEM）研究了还原剂浓度对 2-38nm 铑粒子的可控尺寸合成的影响。高分辨率 TEM（HRTEM）证实了具有与报道的 Rh（111）面一致的条纹间距的铑纳米粒子的形成。原子力显微镜（AFM）研究揭示了这些薄膜在 1×1μm 面积上的连续性。通过循环伏安法研究了这些纳米结构 Rh-NH(x)薄膜对 0.5M NaOH 中甲醛氧化的电催化应用。本研究中采用的策略形成的 Rh 纳米粒子有望也可用于其他催化应用。
