A glucose bio-battery prototype based on a GDH/(polymethylene blue) bioanode and a graphite cathode with an iodide/tri-iodide redox couple

作者：Wang Jen Yuan; Nien Po Chin; Chen Chien Hsiao; Chen Lin Chi^*; Ho Kuo Chuan

来源：Bioresource Technology, 2012, 116: 502-506.

DOI：10.1016/j.biortech.2012.03.083

• Biofuel cell
• Glucose bio-battery
• Iodide/tri-iodide
• Multi-walled carbon nanotube
• Poly(methylene blue)

A glucose bio-battery prototype independent of oxygen is proposed based on a glucose dehydrogenase (GDH) bioanode and a graphite cathode with an iodide/tri-iodide redox couple. At the bioanode, a NADH electrocatalyst, poly(methylene blue) (PMB), which can be easily grown on the electrode (screen-printed carbon paste electrode, SPCE) by electrodeposition, is harnessed and engineered. We find that carboxylated multi-walled carbon nanotubes (MWCNTs) are capable of significantly increasing the deposition amount of PMB and thus enhancing the PMB's electrocatalysis of NADH oxidation and the glucose bio-battery's performance. The choice of the iodide/tri-iodide redox couple eliminates the dependence of oxygen for this bio-battery, thus enabling the bio-battery with a constant current-output feature similar to that of the solar cells. The present glucose bio-battery prototype can attain a maximum power density of 2.4 mu W/cm(2) at 25 degrees C.

• 出版日期2012-7