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Nanotechnology. 2012 Jul 27;23(29):294013. doi: 10.1088/0957-4484/23/29/294013. Epub 2012 Jun 28.

Electrically conductive, immobilized bioanodes for microbial fuel cells.

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  • 1Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.


The power densities of microbial fuel cells with yeast cells as the anode catalyst were significantly increased by immobilizing the yeast in electrically conductive alginate electrodes. The peak power densities measured as a function of the electrical conductivity of the immobilized electrodes show that although power increases with rising electrical conductivity, it tends to saturate beyond a certain point. Changing the pH of the anode compartment at that point seems to further increase the power density, suggesting that proton transport limitations and not electrical conductivity will limit the power density from electrically conductive immobilized anodes.

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