应用化学 ›› 2009, Vol. 26 ›› Issue (12): 1471-1475.

• 研究论文 • 上一篇    下一篇

酞菁钴及其衍生物修饰电极对分子氧的电催化还原

李亚男1,2,霍丽华1*,左霞1,高山1,赵辉1,江舟3,陈耐生3,黄金陵3   

  1. (1.黑龙江大学化学化工与材料学院,功能材料省高校重点实验室 哈尔滨 150080;
    2.黑龙江东方学院食品与环境工程学部 哈尔滨;3.福州大学化学化工学院,功能材料研究所 福州)
  • 收稿日期:2009-01-15 修回日期:2009-04-27 出版日期:2009-12-10 发布日期:2009-12-10
  • 通讯作者: 霍丽华,女,博士,教授; E-mail:lhhuo68@yahoo.com; 研究方向:功能材料
  • 作者简介:霍丽华:女,博士,教授,研究方向:功能材料
  • 基金资助:
    教育部新世纪优秀人才支持计划(NCET060349),黑龙江省骨干教师(1152G027)基金资助项目

Electrocatalytical of Reduction of Oxygen at Cobalt Phthalocyanine and Its Derivative Modified Electrodes

LI Ya-Nan1,2, HE Li-Hua1*, ZUO Xia1, GAO Shan1, ZHAO Hui1, JIANG Zhou3, CHEN Nai-Sheng3, HUANG Jin-Ling3   

  1. (1.Laboratory of Functional Materials,School of Chemistry and Materials Science,
    Heilongjiang University,Harbin 150080;
    2.Department of Food and Environmental  Engineering,Heilongjiang Oriental College,Harbin;
    3.Institute of Functional Materials,School of Chemistry and Chemical Engineering,Fuzhou University,Fuzhou)
  • Received:2009-01-15 Revised:2009-04-27 Published:2009-12-10 Online:2009-12-10
  • Contact: HUO Li-hua

摘要:

在玻碳电极上采用吸附法制备了四溴代酞菁钴(CoPcBr4)、酞菁钴(CoPc)和四-α-(2,2,4-三甲基-3-戊氧基)酞菁钴(CoPc(OC8H17)4)修饰电极。利用循环伏安法和线性扫描伏安法研究了修饰电极在酸性介质中对分子氧的电催化还原,比较了不同取代基的酞菁钴对电催化性质的影响。结果表明,它们对分子氧还原均具有良好的电催化活性,其中酞菁钴和四-α-(2,2,4-三甲基-3-戊氧基)酞菁钴对O2的催化是2电子还原生成H2O2,与裸电极相比,O2的还原峰电位分别向正方向移动了0.33和0.48 V。而四溴代酞菁钴修饰电极在-0.1和-0.7 V附近产生的2个还原峰,说明它催化O2到H2O2的还原以后还可以促进H2O2继续还原到H2O,最终实现O2的4电子还原。

关键词: 金属酞菁,氧还原,电催化

Abstract:

Tetrabromophthalocyanine cobalt (CoPcBr4), phthalocyanine cobalt (CoPc) and tetra-α-(2,2,4-trimethyl-3-pentyloxy)phthalocyanine cobalt (CoPc(OC8H17)4) modified electrodes were prepared on glass carbon (GC) electrodes by the adsorption method. Electrocatalytic reduction of molecular oxygen by the modified electrodes was studied in acidic media by means of cyclic voltammetry and linear sweep voltammetry. The effects of phthalocyanine cobalt with different substituted groups on electrocatalytic property were compared. The results indicate that they have good electrocatalytic activity for molecular oxygen reduction. CoPc and CoPc(OC8H17)4 could catalyze O2 to give H2O2 via two-electron transfer and the reduction peak potentials of O2 positively shifted 0.33 V and 0.48 V respectively compared with the bare GC electrode. There are two reduction peaks at about -0.1 V and -0.7 V in the voltammogram obtained at CoPcBr4 modified electrode, indicating that it catalyzed the reduction of O2 to H2O2 and then sequentially reduced H2O2 to H2O. Finally, it completed the four-electron reduction of O2.

Key words: metellophthalocyanines, oxygen reduction, electrocatalysis

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