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Citation: SONG Jie, SUN Dong-Mei, DU Jiang-Yan, GE Cun-Wang, LU Tian-Hong. Myoglobin Adsorbed on Active Carbon as Cathodic Catalyst in Biofuel Cell[J]. Chinese Journal of Applied Chemistry, ;2007, 24(11): 1232-1235. shu

Myoglobin Adsorbed on Active Carbon as Cathodic Catalyst in Biofuel Cell

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a Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Huaiyin Normal College, Huaiyin;
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b College of Chemistry and Environmental Science, Nanjing Normal University, Nanfing 210097;
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c School of Chemistry and Chemical Engineering, Nantong University, Nantong

Corresponding author: LU Tian-Hong,
Received Date: 27 December 2006
Available Online: 1 March 2007
Fund Project: 国家自然科学基金(20471030,60571055)资助项目 (20471030,60571055)

Active carbon supported myoglobin(Mb-C) catalyst was prepared via the balance adsorption method. The cyclic voltammetric measurements indicated that the redox peaks of Mb adsorbed on the active carbon were located at -342 and -402 mV, respectively. The currents of the redox peaks are basically equal. The peak currents were proportional to the scan rate. These results indicated that Mb adsorbed on the active carbon and underwent a non-diffused, direct and quasi-reversible electrochemical reaction. The stability of the Mb-C catalyst fixed on the glassy carbon(GC) electrode by Nafion membrane was excellent. The cyclic voltammogram of the Mb-C/GC electrode immersed in the phosphate buffer solution for 7 days was similar to that measured immediately after preparation. The amount of Mb adsorbed on the electrode was calculated to be 4.5×10^-10 mol/cm². In addition, the Mb-C catalyst showed a good electrocatalytic activity for the reduction of O₂, illustrating that the Mb adsorbed on the active carbon was not denatured and thus its bioactivity was maintained. Thus, the Mb-C catalyst can be used as the cathodic catalyst in the biofuel cell.
- biofuel cell,
- myoglobin,
- cathodic catalyst,
- active carbon,
- oxygen reduction
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