期刊
ANALYTICAL LETTERS
卷 41, 期 15, 页码 2819-2831出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00032710802421640
关键词
Carbon paste electrode; direct electrochemistry; electrocatalysis; hemoglobin; H2O2; trichloroacetic acid
资金
- National Natural Science Foundation of China [20635020, 20405008]
A new hemoglobin (Hb) modified carbon paste (CP) electrode was fabricated by simply mixing the hemoglobin with carbon powder and paraffin homogeneously. To prevent the leakage of Hb from the electrode surface, a Nafion film was further applied on the surface of Hb-carbon composite paste electrode. Direct electrochemistry of hemoglobin in the paste electrode was easily achieved, and a pair of well-defined quasi-reversible redox peak of heme Fe(III)/Fe(II) couple appeared with the formal potential (E0') as-0.335 V (vs. Saturated calomel electrode; CE) in pH 7.0 phosphate buffer solution (PBS). The fabricated Hb modified electrode showed good electrocatalytic ability to the reduction of trichloroacetic acid (TCA) and H2O2.
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