Hydrogenophilic dechlorinating bacteria were shown to catalyze H(2) production by proton reduction, with electrodes serving as electron donors, either in the presence or in the absence of a redox mediator. In the presence of methyl viologen, Desulfitobacterium- and Dehalococcoides-enriched cultures produced H(2) at rates as high as 12.4 mu eq/mgVSS (volatile suspended solids)/d, with the cathode set at -450 mV vs. the standard hydrogen electrode (SHE), hence very close to the reversible H(+)/H(2) potential value of -414 mV at pH 7. Notably, the Desulfitobacterium-enriched culture was capable of catalyzing H(2) production without mediators at cathode potentials lower than -700 mV. At -750 mV, the H(2) production rate with Desulfitobacterium spp. was 13.5 mu eq/mgVSS/d (or 16 mu eq/cm(2)/d), nearly four times higher than that of the abiotic controls. Overall, this study suggests the possibility of employing dechlorinating bacteria as hydrogen catalysts in new energy technologies such as microbial electrolysis cells. (C) 2010 Elsevier Ltd. All rights reserved.

Bioelectrochemical hydrogen production with hydrogenophilic dechlorinating bacteria as electrocatalytic agents / Villano, Marianna; Luca De, Bonis; Simona, Rossetti; Aulenta, Federico; Majone, Mauro. - In: BIORESOURCE TECHNOLOGY. - ISSN 0960-8524. - STAMPA. - 102:3(2011), pp. 3193-3199. [10.1016/j.biortech.2010.10.146]

Bioelectrochemical hydrogen production with hydrogenophilic dechlorinating bacteria as electrocatalytic agents

VILLANO, MARIANNA;AULENTA, Federico;MAJONE, Mauro
2011

Abstract

Hydrogenophilic dechlorinating bacteria were shown to catalyze H(2) production by proton reduction, with electrodes serving as electron donors, either in the presence or in the absence of a redox mediator. In the presence of methyl viologen, Desulfitobacterium- and Dehalococcoides-enriched cultures produced H(2) at rates as high as 12.4 mu eq/mgVSS (volatile suspended solids)/d, with the cathode set at -450 mV vs. the standard hydrogen electrode (SHE), hence very close to the reversible H(+)/H(2) potential value of -414 mV at pH 7. Notably, the Desulfitobacterium-enriched culture was capable of catalyzing H(2) production without mediators at cathode potentials lower than -700 mV. At -750 mV, the H(2) production rate with Desulfitobacterium spp. was 13.5 mu eq/mgVSS/d (or 16 mu eq/cm(2)/d), nearly four times higher than that of the abiotic controls. Overall, this study suggests the possibility of employing dechlorinating bacteria as hydrogen catalysts in new energy technologies such as microbial electrolysis cells. (C) 2010 Elsevier Ltd. All rights reserved.
2011
biocathode; bioelectrochemical systems; dechlorinating bacteria; hydrogen production; redox mediator
01 Pubblicazione su rivista::01a Articolo in rivista
Bioelectrochemical hydrogen production with hydrogenophilic dechlorinating bacteria as electrocatalytic agents / Villano, Marianna; Luca De, Bonis; Simona, Rossetti; Aulenta, Federico; Majone, Mauro. - In: BIORESOURCE TECHNOLOGY. - ISSN 0960-8524. - STAMPA. - 102:3(2011), pp. 3193-3199. [10.1016/j.biortech.2010.10.146]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/380483
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