介孔碳化钨/炭纳米复合材料的制备与表征(英文)

Synthesis and characterization of mesoporous tungsten carbide/carbon nanocomposites

碳化钨作为一种潜在的催化剂可广泛应用于电化学催化和有机合成反应.本文通过一种简单可行的"软模板"法制备了介孔碳化钨/炭纳米复合材料,主要包括"油包水"微乳液形成、模板诱导自组装、高温碳化还原过程.采用X-射线衍射、透射电镜和比表面积和孔径分布等方法对材料进行了表征与分析。结果表明,该复合材料具有蠕虫状的介孔结构、高的比表面积、碳化钨粒子(约40 nm)均匀的分布在炭载体上.介孔碳化钨/炭纳米复合材料可用于燃料电池、化学传感器和电催化有机合成反应.

Tungsten carbide （WC） can be used as potential catalysts for various electrocatalyst and chemical reactions. A simply soft-template route to fabricate mesoporous tungsten carbide/carbon （WC/C） composites was prepared by W/O emulsion and triblock copolymer self-assembly strategies, followed by a high-temperature carbothermal reduction. XRD, TEM and BET surface area and pore size distribution techniques were employed to characterize the mesoporous WC/Cnanocomposites. The results show that the resultant materials have wormlike mesostructure, nnaoscale （about 40 nm） and well- dispersed tungsten carbide particles, and high surface areas. Furthermore, the mesoporous WC/C nanocomposites could have great potential applications in fuel cell elecl^ocatalyst, sensors and organic synthesis reactions.