摘要
<正> Three kinds of metal catalysts Ni/D4, Ni-Mn/D4, Ni-Mn-La/D4, wrapped in organosilicon compound were prepared by metal vapor synthesis. Their feature was characterized with XRD, TEM, XPS, FMR and static magnetic measurement. The metal particle size in catalysts was less than 3.5 am. The results of XPS showed that the metals in the catalysts existed in zero and other valent state. Inner metal, as an organosilicon compound folded around the metal particle, was protected from oxidation. FMR and static magnetic measuremeat revealed that metal particles were spheroidal and of superparamagnetism. Of all the caralysts the catalytic activity of Ni-Mn-La/D4was the highest in hydrogenating furfuraldehyde into furfuralcohol.
Three kinds of metal catalysts Ni/D<sub>4</sub>, Ni-Mn/D<sub>4</sub>, Ni-Mn-La/D<sub>4</sub>, wrapped in organosilicon compound were prepared by metal vapor synthesis. Their feature was characterized with XRD, TEM, XPS, FMR and static magnetic measurement. The metal particle size in catalysts was less than 3.5 am. The results of XPS showed that the metals in the catalysts existed in zero and other valent state. Inner metal, as an organosilicon compound folded around the metal particle, was protected from oxidation. FMR and static magnetic measuremeat revealed that metal particles were spheroidal and of superparamagnetism. Of all the caralysts the catalytic activity of Ni-Mn-La/D<sub>4</sub> was the highest in hydrogenating furfuraldehyde into furfuralcohol.
