Bacteria Use Hydrogen, Carbon Dioxide to Produce Electricity

Researchers have engineered a strain of electricity-producing bacteria that can grow using hydrogen gas as its sole electron donor and carbon dioxide as its sole source of carbon. They studied a relative of G. metallireducens called Geobacter sulfurreducens, which has the ability produce electricity by reducing organic carbon compounds with a metal electrode like iron oxide or gold to serve as the sole electron acceptor.  They genetically engineered a strain of the bacteria that did not need organic carbon to grow in a microbial fuel cell.

Source, ASM, 19 May 2013

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