燃料化学学报2018，Vol.46Issue(5)：585-591,7.
核壳结构碳化钨复合微球催化剂对甲醇电催化性能
Core-shell hierarchical tungsten carbide composite microspheres towards methanol electrooxidation
摘要
Abstract
Tungsten carbides microspheresare synthesized by in situ reduction of ammonium met tungstate microspheres (AMT) precursors as a function of reaction time under CO/CO2mixture atmosphere. The morphology, size and composition of the as-prepared tungsten carbide microspheres are characterized using X-ray diffraction(XRD),scanning electron microscopy(SEM) and X-ray photoelectron spectroscopy (XPS). Pt nanoparticles with a diameter of 4. 6 nm are loaded onto the surface of WC microspheres using a conventional sodium borohydride reduction method. The electro-catalytic activity and stability toward methanol electrooxidation (MOR) are investigated using cyclic voltammetry(CV) and chronoamperometry(CA). The resultant Pt/WCO-6 h catalyst exhibits low onset potential and excellent catalytic performances in comparison to the commercial JM Pt/C and Pt/WC-15 h catalysts. Further investigation shows that besides the synergistic effect between WC and Pt, the existence of WO2might also play an important role in improving the electro-catalytic activity, indicating the positive effect of the surface oxide on the activity and stability of Pt/WC catalysts towards MOR.关键词
直接甲醇燃料电池/甲醇氧化/碳化钨/电催化/氧化钨Key words
direct methanol fuel cells/methanol electrooxidation/tungsten carbide/electro-catalyst/tungsten oxidation分类
化学引用本文复制引用
钟盛文,胡仙超,俞园,余长林,周阳..核壳结构碳化钨复合微球催化剂对甲醇电催化性能[J].燃料化学学报,2018,46(5):585-591,7.基金项目
The project was supported by National Natural Science Foundation of China(51404110,21567008 and 21506187),Education Department Project Fund of Jiangxi Province(GJJ150665),Program of 5511 Talents in Scientific and Technological Innovation of Jiangxi Province(20165BCB18014)and Undergraduate Innovation Training Program(XZG-16-08-14). （51404110,21567008 and 21506187）
