Citation: Pan Zhan-Chang, Zeng Zhang-Yi, Li Qiong. Catalytic Reduction of Oxygen on Glassy Carbon Electrode Modefied with Dyestuff Direct Light Turquoise GL[J]. Acta Physico-Chimica Sinica, 1999, 15(05): 462-466. doi: 10.3866/PKU.WHXB19990515
English
Catalytic Reduction of Oxygen on Glassy Carbon Electrode Modefied with Dyestuff Direct Light Turquoise GL
The behavior of catalytic reduction of oxygen on modified electrodes of three types are studied using cyclic voltammetry in an acidic solution. The first electrode modified with industrial dyestuff Direct Light Turquoise GL(denoted as GL) has notable catalytic activity, two reduction peaks of O2 appear on CV curve (Ep is - 0. 25 V and - 0. 40 V respectively), but its stability is poor The second electrode modified with poly(4-vinyl-pyridine) and GL shows quite od catalytic performance. Both activity and stability are much better than those of the first electrode, ip in the CV curve equals 200% of that of the lst electrode and the Ev for the first peak has shifted positively about 0. 05 V. The catalytic performance of the third electrode modified with Nafion and GL is a little bid better than that of the first electrode, but is much worse than that of the second electrode. The reason of differences in the catalytic performances of these electrodes are discussed.
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Key words:
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Oxygen reduction
- / Modified electrode
- / Electrocatalysis
- / Direct light turquoise GL
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