中文摘要：

有核心壳(WC@TiO2 ) 的 Monotungsten 碳化物和 titania nanocomposite 组织被水花弄干和减小碳化反应的一条新途径准备，与象先锋的 titania nanopowder 和铵 metatungstate，是的甲烷碳来源，和氢作为减小气体。样品被 X 光检查衍射描绘，扫描电子显微镜，高分辨率传播电子显微镜和 X 光检查精力分散光谱学。结果证明它的水晶阶段由 brookite，钨和 monotungsten 碳化物组成。样品粒子的形态学是不规则的像范围，与比 100 nm 小的一条直径。它的化学部件是钛，钨，碳和氧。titania 核心和形式的表面上的 Monotungsten 碳化物 nanoparticles 谎言在在 nanocomposite 的 titania 核心附近的不完全的壳。有三个电极的一个 microelectrode 系统的测量证明样品是对在在房间温度的基本答案的 nitrophenol 活跃的 electrocatalytic。它的山峰潜力在( 0.988 V (对浸透的甘汞电极( SCE ))，它比山峰潜力更否定，( 0.817 V (对 SCE )， mesoporous monotungsten 碳化物，和它的山峰，电流是 8.809 A ，它比山峰电流高， 4.058 A ， mesoporous monotungsten 碳化物。样品的氢产生潜力在(1.199 V (对 SCE ) ，它是比纯 nanosized monotungsten 碳化物在的更否定的(1.100 V (对 SCE ) 。这些结果证明在样品罐头的 titania 的存在降低 nitrophenol electrocatalysis 的山峰潜力和它的氢产生潜力，并且在房间温度在基本答案增加它 nitrophenol electrocatalysis 的山峰水流。这在 electrocatalysis 显示 titania 和 monotungsten 碳化物的 synergistic 效果。

英文摘要：

Monotungsten carbide and titania nanocomposite with core-shell（WC@TiO2）structure was prepared by a new approach of spray drying and reduction-carbonization reaction,with titania nanopowder and ammonium metatungstate as precursors,methane as carbon source,and hydrogen as reduction gas.The sample was characterized by X-ray diffraction,scanning electron microscope,high resolution transmission electron microscope and X-ray energy dispersion spectroscopy.The results show that its crystal phase is composed of brookite,tungsten and monotungsten carbide.The morphology of the sample particle is irregular sphere-like,with a diameter smaller than 100 nm.Its chemical components are titanium,tungsten,carbon and oxygen.Monotungsten carbide nanoparticles lie on the surface of titania core and form an incomplete shell around titania core in the nanocomposite.The measurement with a microelectrode system of three electrodes shows that the sample is electrocatalytic active to nitrophenol in basic solution at room temperature.Its peak potential is at0.988 V（vs saturated calomel electrode （SCE））,which is more negative than the peak potential,0.817 V（vs SCE）,of mesoporous monotungsten carbide, and its peak current is 8.809μA,which is higher than the peak current,4.058μA,of mesoporous monotungsten carbide.The hydrogen generation potential of the sample is at1.199 V（vs SCE）,which is more negative than that of pure nanosized monotungsten carbide at1.100 V（vs SCE）.These results show that the presence of titania in the sample can lower the peak potential of nitrophenol electrocatalysis and its hydrogen generation potential,and increase its peak current of nitrophenol electrocatalysis in basic solution at room temperature.This indicates a synergistic effect of titania and monotungsten carbide in electrocatalysis.