催化学报 ›› 2016, Vol. 37 ›› Issue (1): 159-168.DOI: 10.1016/S1872-2067(15)60990-1

• 论文 • 上一篇    下一篇

用于电催化氧化甲醛的新型Ni(OH)2-X/CPE负载电极的制备

Safura Kaviana, Seyed Naser Azizia, Shahram Ghasemib   

  1. a 马赞德兰大学化学学院分析部, 巴博尔萨47416-95447, 伊朗;
    b 马赞德兰大学化学学院, 巴博尔萨47416-95447, 伊朗
  • 收稿日期:2015-08-28 修回日期:2015-10-02 出版日期:2015-12-26 发布日期:2015-12-26
  • 通讯作者: Seyed Naser Azizi
  • 作者简介:Seyed Naser Azizi

Preparation of a novel supported electrode comprising a nickel (II) hydroxide-modified carbon paste electrode (Ni(OH)2-X/CPE) for the electrocatalytic oxidation of formaldehyde

Safura Kaviana, Seyed Naser Azizia, Shahram Ghasemib   

  1. a Analytical Division, Faculty of Chemistry, University of Mazandaran, Babolsar 47416-95447, Iran;
    b Faculty of Chemistry, University of Mazandaran, Babolsar 47416-95447, Iran
  • Received:2015-08-28 Revised:2015-10-02 Online:2015-12-26 Published:2015-12-26
  • Contact: Seyed Naser Azizi

摘要:

采用一种简易的方法制备了新型Ni(OH)2-X/CPE电极, 并将其用于电催化氧化甲醛反应. 采用扫描电镜和能量散射谱对所制Ni(OH)2-X/CPE电极进行了表征, 并运用循环伏安法、电化学阻抗谱和计时电流法考察了该电极的电化学性能. 结果表明, 该Ni(OH)2-X/CPE电极对甲醛氧化表现出高电催化活性, 这归功于X具有纳米孔结构和大的比表面积. 电子传递系数和催化反应速率常数分别为0.7和6.1×104 cm3/(mol·s). 该电极对甲醛氧化具有高而稳定的电催化活性, 且制备重复性高, 有望应用于燃料电池中.

关键词: 燃料电池, 电催化剂, 多孔NaX纳米分子筛, 甲醛, 计时电流法

Abstract:

We prepared a novel nickel (II) hydroxide-modified carbon paste electrode (Ni(OH)2-X/CPE) for the electrocatalytic oxidation of formaldehyde. The electrode was prepared by a simple method without the use of linking chemicals. The prepared Ni(OH)2-X/CPE material was characterized by scanning electron microscopy and energy dispersive X-ray spectrometry. The electrochemical performance of the proposed electrode was investigated using cyclic voltammetry, electrochemical impedance spectroscopy, and chronoamperometry. The results indicate that Ni(OH)2-X/CPE exhibits good electrocatalytic activity with regards to formaldehyde oxidation owing to its nanoporous structure and the large surface area of zeolite X. The values of the electron transfer coefficient and the catalytic rate constant were 0.7 and 6.1 × 104 cm3/(mol·s), respectively. Therefore, the proposed electrode, which showed remarkable electroactivity with regards to formaldehyde oxidation with long-term stability and good reproducibility, could be useful in fuel cells.

Key words: Fuel cell, Electrocatalyst, Porous NaX nanozeolite, Formaldehyde, Chronoamperometry