| Title | Bioelectrochemical hydrogen production with hydrogenophilic dechlorinating bacteria as electrocatalytic agents |
| Abstract | Hydrogenophilic dechlorinating bacteria were shown to catalyze H2 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 H2 at rates as high as 12.4 leq/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+/H2 potential value of 414 mV at pH 7. Notably, the Desulfitobacterium-enriched culture was capable of catalyzing H2 production without mediators at cathode potentials lower than 700 mV. At 750 mV, the H2 production rate with Desulfitobacterium spp. was 13.5 leq/mgVSS/d (or 16 leq/cm2/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. |
| Source | Bioresource technology 102, pp. 3193–3199 |
| Keywords | Bioelectrochemical systemsBiocathodeDechlorinating bacteriaHydrogen productionRedox mediator |
| Journal | Bioresource technology |
| Editor | Elsevier Applied Science,, Barking, Regno Unito |
| Year | 2011 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.biortech.2010.10.146 |
| Authors | Villano M., De Bonis L., Rossetti S., Aulenta F., Majone M. |
| Text | 42434 2011 10.1016/j.biortech.2010.10.146 Bioelectrochemical systems Biocathode Dechlorinating bacteria Hydrogen production Redox mediator Bioelectrochemical hydrogen production with hydrogenophilic dechlorinating bacteria as electrocatalytic agents Villano M., De Bonis L., Rossetti S., Aulenta F., Majone M. a Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy b Water Research Institute IRSA CNR , National Research Council, Area della Ricerca Roma 1 Montelibretti, Via Salaria km. 29.300, 00015 Monterotondo RM , Italy Hydrogenophilic dechlorinating bacteria were shown to catalyze H2 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 H2 at rates as high as 12.4 leq/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 /H2 potential value of 414 mV at pH 7. Notably, the Desulfitobacterium enriched culture was capable of catalyzing H2 production without mediators at cathode potentials lower than 700 mV. At 750 mV, the H2 production rate with Desulfitobacterium spp. was 13.5 leq/mgVSS/d or 16 leq/cm2/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. 102 Published version Bioelectrochemical hydrogen production with hydrogenophilic dechlorinating bacteria as electrocatalytic agents pdf pubblicazione Biores_Techno_2011.pdf Articolo in rivista Elsevier Applied Science, 0960 8524 Bioresource technology Bioresource technology Bioresour. technol. Bioresource technology. simona.rossetti ROSSETTI SIMONA TA.P07.017.001 Caratterizzazione di biomasse per l ottimizzazione dei processi biologici |
