Microbial electrosynthesis of butyrate from carbon dioxide

The authors would like to thank the Spanish Ministry (Best-Energy, CTQ2011-23632) for its financial support in this study. LEQUIA has been recognised as a consolidated research group by the Catalan Government (2014-SGR-1168). R.G. gratefully acknowledges support from Beatriu de Pinos fellowship (BP-2011-B) and FP7 Marie Curie Career Integration Grants (PCIG13-GA-2013-618593). P.B.-V is supported by a project grant from the Catalan Government (2014 FI-B1 00119)