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Dr. Jerome T. Babauta, Dr. Hung Duc Nguyen, Dr. Ozlem Istanbullu and Dr. Haluk Beyenal Microscale Gradients of Oxygen, Hydrogen Peroxide, and pH in Freshwater Cathodic Biofilms ChemSusChem 6

Version of Record online: 13 JUN 2013 | DOI: 10.1002/cssc.201300019

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A river runs through: Sediment microbial fuel cells are a new technology used to harness the natural redox gradients in sediments to produce usable energy. Microbial catalysis of oxygen reduction is often used to enhance the recovery of energy by sediment microbial fuel cells. It is demonstrated that microscale gradients of pH, oxygen, and hydrogen peroxide resulting from oxygen reduction negatively affects the colonization of micro-organisms on cathode surfaces that could be used in sediment microbial fuel cells.

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