In this work,fullerene was modified by platinum,ruthenium,tin and tungsten nanoparticles.The material was characterized by XRD,ICP-OES and TEM micrograph.The average nanoparticle size on fullerene was 5-8 nm.The appli...In this work,fullerene was modified by platinum,ruthenium,tin and tungsten nanoparticles.The material was characterized by XRD,ICP-OES and TEM micrograph.The average nanoparticle size on fullerene was 5-8 nm.The application of this material was investigated as a catalyst for methanol oxidation in direct methanol fuel cell.A glassy carbon electrode was modified by Pt/Ru/Sn/W fullerene and electrocatalytic activity of the electrode toward methanol oxidation in basic medium has been demonstrated and investigated using cyclic voltammetry.The catalyst showed good reactivity for methanol oxidation.展开更多
The density of molten Ni-W alloys was measured with a nullified pycnometric method. It is fiund that the density of the molten Ni-W alloys decreases with temperature rising, but increases with the increase of tungste...The density of molten Ni-W alloys was measured with a nullified pycnometric method. It is fiund that the density of the molten Ni-W alloys decreases with temperature rising, but increases with the increase of tungsten concentrution in the alloys. The molar volume of molten Ni-W binary alloys increases with the increase of temperature and tungsten concentration. The partial molar volume of tungsten in liquid Ni-W binary alloy has been calculuted approximatelr as （ - 1.59 ＋ 5.64 × 10^-3 T） × 10^-6 m^3·mol^-1.展开更多
基金Financial support from Renewable Energy Organization of Iran(SUNA)
文摘In this work,fullerene was modified by platinum,ruthenium,tin and tungsten nanoparticles.The material was characterized by XRD,ICP-OES and TEM micrograph.The average nanoparticle size on fullerene was 5-8 nm.The application of this material was investigated as a catalyst for methanol oxidation in direct methanol fuel cell.A glassy carbon electrode was modified by Pt/Ru/Sn/W fullerene and electrocatalytic activity of the electrode toward methanol oxidation in basic medium has been demonstrated and investigated using cyclic voltammetry.The catalyst showed good reactivity for methanol oxidation.
文摘The density of molten Ni-W alloys was measured with a nullified pycnometric method. It is fiund that the density of the molten Ni-W alloys decreases with temperature rising, but increases with the increase of tungsten concentrution in the alloys. The molar volume of molten Ni-W binary alloys increases with the increase of temperature and tungsten concentration. The partial molar volume of tungsten in liquid Ni-W binary alloy has been calculuted approximatelr as （ - 1.59 ＋ 5.64 × 10^-3 T） × 10^-6 m^3·mol^-1.
