Nickel, Copper and Some of their Alloys as Catalysts for Ethylene Hydrogenation¹

Hydrogenation of ethylene on metallic catalysts

“…Ni, Pd, Pt atom% 80 1 Alloys with superlattice have lower activation heats, although their activity is much the same as that of disordered alloys [47,48,49 [53] have observed the activity of Cu-Ni alloys in catalyzing the hydrogenation of ethylene from -70 to above 100 *C; the results indicate that the activity of the alloys outweigh that of any pure component, in contrast with the results at 500 *C shown in figure 6. 3.2.2.3.…”

A study on the effect of surface treatment of carbon nanotubes for liquid crystalline epoxide–carbon nanotube composites

“…The iron catalyst powder used in this study was prepared via the precipitation of ferric carbonate by addition of ammonium bicarbonate, as described by Best and Russell. 6 The precipitate was dried overnight in an oven at 100 uC and then calcined in air at 400 uC for 5 h to convert the carbonate into the oxide. The calcined catalyst was reduced in a 10% H 2 -He mixture for 20 h at 480 uC.…”

“…CNs have been studied for their potential applications in nanoscale devices and materials, field emission, and superconductors. [2][3][4][5][6][7] Recently, mass production of CNs has been achieved using arc discharge and laser ablation. The excellent electrical properties of CNs make them attractive candidates for new electronic devices.…”

Synthesis and Protium Absorbing Properties of Vapor Grown Carbon Nano-Fibers Grown by Fe-based Catalyst

“…Thus, a coprecipitation technique followed by reduction of metal carbonates, by which fine metal or alloy catalysts with a diameter of less than 100 nm can be obtained, is usually employed to prepare the catalysts. 7) Instead of the conventional coprecipitation technique, we select Fe-Zr-B and Fe-Si-B alloy systems as novel catalysts where nanoscale α-Fe particles are formed. [8][9][10] These alloys are well known to precipitate nanoscale bcc-Fe crystal grains with a diameter of 15-20 nm in amorphous phase by anneal- * 1 Graduate Student, Tohoku University.…”