碳化钨晶格中的氧原子及其对催化活性的影响

OXYGEN IN THE LATTICE OF TUNGSTEN CARBIDE AND ITS EFFECT ON HYDROCARBON CONVERSION

用XPS、XRD、EXAFS及EHMO量子计算等多种分析方法确证了低温合成的碳化钨晶格中嵌入了氧原子.碳化钨对烷烃转化反应及CO加氢反应都有活性。晶格氧使碳化钨的比活性略有下降.

Several analytic methods, such as XPS, XRD, EXAFS and EHMO quantum calculation were used to verify that oxygen atoms are inserted in the lattice of tungsten carbide prepared at low temperature. Just like Pt, tungsten carbides have catalytic activities for hydrocarbon conversion and carbon monooxide hydrogenation. Oxygens in the lattice lower the specific catalytic activity of tungsten carbide for these reactions.