Direct electrochemistry and electrocatalysis of myoglobin in dodecyltrimethylammonium bromide film modified carbon ceramic electrode

作者：Zhou, Yuan Zhen^*; Wang, Hui; Dong, She Ying; Tian, An Xiang; He, Zhi Xian; Chen, Bin

来源：Chinese Chemical Letters, 2011, 22(4): 465-468.

DOI：10.1016/j.cclet.2010.11.012

• Electrocatalysis
• Direct electron transfer
• DTAB
• H2O2
• Myoglobin

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 (Fe-II/Fe-III) 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-o') 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).

• 出版日期2011-4
• 单位西安建筑科技大学