聚吡咯修饰Co_3O_4的制备及其对H_2O_2的电还原性能

Preparation of the polypyrrole modified Co_3O_4 nanowires catalyst and its performance for H_2O_2 electroreduction

采用聚吡咯电聚合方法修饰Co3O4纳米线制备电极。电极的结构和形貌用X-射线衍射仪(XRD)和扫描电子显微镜(SEM)进行表征。利用循环伏安法研究了聚吡咯修饰Co3O4纳米线电极对H2O2的电催化活性。结果表明,在3.0 mol·L-1KOH和0.4 mol·L-1的H2O2溶液中,聚吡咯修饰Co3O4纳米线电极的电流密度可达-174.8 m A·cm-2,与未被修饰的Co3O4纳米线电极相比,电极的活性和稳定性都有明显提高。

An electro polymerization method was adopted to obtain polypyrrole modified Co3O4 nanowires electrodes. The nanowires were characterized by scanning electron microscope（ SEM） and X-ray diffraction（ XRD） meter. The catalytic performance of the obtained electrode for H2O2 electroreduction in KOH solution was evaluated by means of linear scan voltammetry. The results showed that a current density of- 174. 8 m A·cm^- 2in the solution containing 3. 0 mol L^- 1KOH and 0. 4 mol L^- 1H2O2 was obtained.The results indicated that the activity and stability for H2O2 electroreduction have been improved for the polypyrrole modified Co3O4 nanowires electrodes.