碳纳米管载碳化钨的制备及其对甲醇氧化的电催化性能  

Preparation and electrocatalytic activity of WC/CNT composite for methanol electrooxidation

作　　者：滕文娟[1] 毛信表[1] 马淳安[1] 

机构地区：[1]浙江工业大学科技部能源材料及应用国际科技合作基地,浙江杭州310032

出　　处：《浙江工业大学学报》2011年第4期364-368,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(20476097);浙江省国际科技合作重大专项(2008C04G2020003);浙江省科学基金资助项目(Y406094)

摘　　要：以质量分数为10%的偏钨酸铵溶液为前驱体,CH4/H2为还原碳化气氛,采用表面修饰技术和还原碳化技术制备了碳化钨/碳纳米管（WC/CNT）复合材料.通过XRD,SEM等对WC/CNT纳米复合材料进行表征,结果显示WC/CNT复合材料是由WC,W2C和C三相组成,碳化钨均匀地分散于碳纳米管外表面,粒径约35~50 nm.用所制备的WC/CNT粉末微电极,考察了WC/CNT复合材料对甲醇的电氧化行为.结果表明,WC/CNT复合材料对甲醇的电催化活性优于Pt微电极和CNT,在电催化过程中能保持良好的化学稳定性.With 10%（wt） ammonium metatungstate（AMT） as precursor,tungsten carbide（WC）/ carbon nanotube（CNT） composite was prepared by surface decoration and in situ reduction techniques in the atmosphere of CH4/H2.The samples were characterized by XRD and SEM.The results showed that the sample WC/CNT composite was composed of WC,C and W2C,and tungsten carbide was on the outer surface of carbon nanotube homogenously,with the particle size of 35~50 nm.The electrocatalytical activity and electrochemical stability of WC/CNT,CNT and Pt microelectrode for the eletrooxidation of methanol were investigated by cyclic voltammetry.The results showed that WC/CNT exhibited better catalytic activity for the eletrooxidation of methanol than either CNT or Pt microelectrode,and also had good electrochemical stability during the process of eletrooxidation in acid solution.

关 键 词：碳化钨 碳纳米管 甲醇 粉末微电极 电催化活性 

分 类 号：O646[理学—物理化学]