Synthesis of Ultrafine Mesoporous Tungsten Carbide by High-energy Ball Milling and Its Electrocatalytic Activity for Methanol Oxidation

极其细小的 mesoporous 钨碳化物(WC ) 用高精力的球 milling 处理从同样综合的 mesoporous WC 被准备。X 光检查衍射(XRD ) ，扫描电子显微镜学(SEM ) ，和氮吸附解吸附作用技术被用来描绘样品。WC 样品的 Brunauer-Emmett-Teller (赌注) 表面区域与增加的球 milling 时间增加了并且在 1011 m2

Ultrafine mesoporous tungsten carbide （WC） was prepared from as-synthesized mesoporous WC using high-energy ball milling treatment. X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and nitrogen adsorption-desorption techniques were used to characterize the samples. Brunauer-Emmett-Teller （BET） surface areas of WC samples increased with the increasing ball milling time and kept constant at 10-11 mZog 1 for over 9 h. The electrocatalytic properties of methanol electro-oxidation at WC powder microelectrodes were investigated by cyclic voltammetry, chronoamperometry, and quasi-steady-state polarization techniques. The results reveal that ball-milled WC exhibits higher activity for methanol electro-oxidation than as-synthesized mesoporous WC. The suitability of ball-milled WC for methanol electro-oxidation is better than platinum （Pt） micro-disk, although the current peak is not as high as the Pt micro-disk. Moreover, increasing the methanol concentration and reaction temperature promotes methanol electro-oxidation on ultrafine mesoporous WC.