催化学报 ›› 2014, Vol. 35 ›› Issue (3): 383-390.DOI: 10.1016/S1872-2067(14)60002-4

• 研究论文 • 上一篇    下一篇

An electrode with Ni(Ⅱ) loaded analcime zeolite catalyst for the electrooxidation of methanol

Seyed Naser Azizia, Shahram Ghasemib, Neda Salek Gilania   

  1. a Analytical Division, Faculty of Chemistry, University of Mazandaran, Postal code 47416-95447, Babolsar, Iran;
    b Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
  • 收稿日期:2013-09-19 修回日期:2013-12-09 出版日期:2014-02-26 发布日期:2014-02-26
  • 通讯作者: Seyed Naser Azizi

An electrode with Ni(Ⅱ) loaded analcime zeolite catalyst for the electrooxidation of methanol

Seyed Naser Azizia, Shahram Ghasemib, Neda Salek Gilania   

  1. a Analytical Division, Faculty of Chemistry, University of Mazandaran, Postal code 47416-95447, Babolsar, Iran;
    b Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
  • Received:2013-09-19 Revised:2013-12-09 Online:2014-02-26 Published:2014-02-26
  • Contact: Seyed Naser Azizi

摘要:

There is a high overvoltage in the oxidation of methanol in fuel cells, and so modified electrodes are used to decrease it. A modified electrode that used Ni(Ⅱ) loaded analcime zeolite to catalyze the electrooxidation of methanol in alkaline solution was proposed. Analcime zeolite was synthesized by hydrothermal synthesis, and Ni(Ⅱ) ions were incorporated into the analcime structure, which was then mixed with carbon paste to prepare modified electrode. The electrocatalytic oxidation of methanol on the surface of the modified electrode in alkaline solution was investigated by cyclic voltammetry and chronoamperometry. The effects of the scan rate of the potential, concentration of methanol, and amount of zeolite were investigated. The rate constant for the catalytic reaction of methanol was 6×103 cm3 mol-1 s-1 from measurements using chronoamperometry. The proposed electrode significantly improved the electron transfer rate and decreased the overpotential for methanol oxidation.

关键词: Analcime zeolite, Modified electrode, Methanol, Cyclic voltammetry, Electrocatalytic oxidation

Abstract:

There is a high overvoltage in the oxidation of methanol in fuel cells, and so modified electrodes are used to decrease it. A modified electrode that used Ni(Ⅱ) loaded analcime zeolite to catalyze the electrooxidation of methanol in alkaline solution was proposed. Analcime zeolite was synthesized by hydrothermal synthesis, and Ni(Ⅱ) ions were incorporated into the analcime structure, which was then mixed with carbon paste to prepare modified electrode. The electrocatalytic oxidation of methanol on the surface of the modified electrode in alkaline solution was investigated by cyclic voltammetry and chronoamperometry. The effects of the scan rate of the potential, concentration of methanol, and amount of zeolite were investigated. The rate constant for the catalytic reaction of methanol was 6×103 cm3 mol-1 s-1 from measurements using chronoamperometry. The proposed electrode significantly improved the electron transfer rate and decreased the overpotential for methanol oxidation.

Key words: Analcime zeolite, Modified electrode, Methanol, Cyclic voltammetry, Electrocatalytic oxidation