引用本文:
Yuan Zhen Zhou, Hui Wang, She Ying Dong, An Xiang Tian, Zhi Xian He, Bin Chen. Direct electrochemistry and electrocatalysis of myoglobin in dodecyltrimethylammonium bromide film modified carbon ceramic electrode[J]. Chinese Chemical Letters,
2011, 22(4): 465-468.
doi:
10.1016/j.cclet.2010.11.012
Citation: Yuan Zhen Zhou, Hui Wang, She Ying Dong, An Xiang Tian, Zhi Xian He, Bin Chen. Direct electrochemistry and electrocatalysis of myoglobin in dodecyltrimethylammonium bromide film modified carbon ceramic electrode[J]. Chinese Chemical Letters, 2011, 22(4): 465-468. doi: 10.1016/j.cclet.2010.11.012
Citation: Yuan Zhen Zhou, Hui Wang, She Ying Dong, An Xiang Tian, Zhi Xian He, Bin Chen. Direct electrochemistry and electrocatalysis of myoglobin in dodecyltrimethylammonium bromide film modified carbon ceramic electrode[J]. Chinese Chemical Letters, 2011, 22(4): 465-468. doi: 10.1016/j.cclet.2010.11.012
Direct electrochemistry and electrocatalysis of myoglobin in dodecyltrimethylammonium bromide film modified carbon ceramic electrode
摘要:
Direct electrochemistry and electrocatalysis of myoglobin (Mb) were studied with Mb immobilized on dodecyltrimethylammonium bromide (DTAB) film modified carbon ceramic (CC) electrode. Cyclic voltammetry showed a pair of well-defined and nearly reversible redox peaks of Mb (FeⅡ/FeⅢ) at about -0.3 V vs. SCE (pH=6.98). The currents of the redox peak were linear to scan rate, and rate constant (Ks) was estimated to be 3.03 s-1. The formal potential (E°') of Mb in the DTAB/CC electrodes shifted linearly with pH with a slope of -36.44 mV/pH, implying that the electron transfer between DTAB and CC electrodes is accompanied by proton transportation. The immobilized Mb exhibited excellent electrocatalytic response to the reduction of hydrogen peroxide (H2O2).
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关键词:
- Electrocatalysis
- / Direct electron transfer
- / DTAB
- / H2O2
- / Myoglobin
English
Direct electrochemistry and electrocatalysis of myoglobin in dodecyltrimethylammonium bromide film modified carbon ceramic electrode
Abstract:
Direct electrochemistry and electrocatalysis of myoglobin (Mb) were studied with Mb immobilized on dodecyltrimethylammonium bromide (DTAB) film modified carbon ceramic (CC) electrode. Cyclic voltammetry showed a pair of well-defined and nearly reversible redox peaks of Mb (FeⅡ/FeⅢ) at about -0.3 V vs. SCE (pH=6.98). The currents of the redox peak were linear to scan rate, and rate constant (Ks) was estimated to be 3.03 s-1. The formal potential (E°') of Mb in the DTAB/CC electrodes shifted linearly with pH with a slope of -36.44 mV/pH, implying that the electron transfer between DTAB and CC electrodes is accompanied by proton transportation. The immobilized Mb exhibited excellent electrocatalytic response to the reduction of hydrogen peroxide (H2O2).
-
Key words:
- Electrocatalysis
- / Direct electron transfer
- / DTAB
- / H2O2
- / Myoglobin
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