高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (9): 1637.

• 研究论文 • 上一篇    下一篇

碳纳米管负载纳米铂修饰电极及电催化氧化H2O2的研究

朱玉奴1, 彭图治1, 李建平1,2   

  1. 1. 浙江大学西溪校区化学系, 杭州310028;
    2. 桂林工学院应用化学系, 桂林541004
  • 收稿日期:2003-06-10 出版日期:2004-09-24 发布日期:2004-09-24
  • 基金资助:

    国家自然科学基金(批准号:29975024,20275034);浙江省重点科技项目资助

Electrocatalytic Oxidation of Hydrogen Peroxide at a Glassy Carbon Electrode Modified with Platinum-decorated Carbon Nanotubes

ZHU Yu-Nu1, PENG Tu-Zhi1, LI Jian-Ping1,2   

  1. Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China
  • Received:2003-06-10 Online:2004-09-24 Published:2004-09-24

摘要: 采用化学气相沉积法在碳纳米管(CNT)上负载Pt纳米颗粒,并制备了CNT-Pt修饰玻碳电极(CNT-Pt/GCE).研究了该修饰电极在磷酸缓冲液中对H2O2的电催化氧化作用以及实验条件的影响.计算了H2O2在CNT-Pt/GCE上的电极反应速率常数.结果表明,CNT-Pt/GCE对H2O2的电化学氧化具有良好的催化作用,电极反应速率常数比铂电极高约2.65倍.初步探讨了电催化氧化机理,为酶电化学传感器的研制提供了一条新的途径.

关键词: 纳米铂颗粒, 碳纳米管, 电催化氧化, 过氧化氢

Abstract: A chemical vapour deposit(CVD) method was used for decoration nano-platinum particles onto carbon nanotube surface. A glassy carbon electrode modified with platinum-decorated carbon nanotube(CNT-Pt/GCE) was prepared. The electrochemical oxidation of hydrogen peroxide(H2O2) was studied on this modified electrode. The rate constant k s of the electro-oxidation reaction was obtained from kinetic equations. The k s at CNT-Pt /GCE was 2.65 times of that at Pt electrode, which shows good catalytic activities for electro-oxidation of H2O2 in phosphate buffer medium. The mechanism of the electro-oxidation reactions was proposed. This modified electrode can be used to fabricate biosensors based on oxidase.

Key words: Nano-platinum particles, Carbon nanotubes, Electrocatalytic-oxidation, Hydrogen peroxide

中图分类号: 

TrendMD: