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Citation: LI Ya-Nan, HUO Li-hua, ZUO Xia, GAO Shan, ZHAO Hui, JIANG Zhou, CHEN Nai-Sheng, HUANG Jin-Ling. Electrocatalytical Reduction of Oxygen at Cobalt Phthalocyanine and Its Derivative Modified Electrodes[J]. Chinese Journal of Applied Chemistry, ;2009, 26(6): 1471-1475. shu

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

LI Ya-Nan ^a,b ,
HUO Li-hua ^a,, ,
ZUO Xia ^a ,
GAO Shan ^a ,
ZHAO Hui ^a ,
JIANG Zhou ^c ,
CHEN Nai-Sheng ^c ,
HUANG Jin-Ling ^c

1.
a Laboratory of Functional Materials, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080;
2.
b Department of Food and Environmental Engineering, Heilongjiang Oriental College, Harbin;
3.
c Institute of Functional Materials, School of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou

Corresponding author: HUO Li-hua,
Received Date: 15 January 2009
Available Online: 27 April 2009
Fund Project: 教育部新世纪优秀人才支持计划(NCET-06-0349) (NCET-06-0349)黑龙江省骨干教师(1152G027)基金资助项目 (1152G027)

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 glassy 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 volammetry.The effects of phthalocyanine cobalt with different substituted groups on electrocatalytic property were compared.The results indicate that they had 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 by 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.
- metellophthalocyanines,
- oxygen reduction,
- electrocatalysis
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