Pseudomonas fragi/graphene–gold hybrid nanomaterial bioanode based microbial fuel cell

Abstract

A Pseudomonas fragi (P. fragi) and graphene–gold hybrid nanomaterial included a carbon felt electrode (graphene–Au/CFE) bioanode was developed and optimized. Then, this bioanode was combined with a platinum cathode and a single cell compartment microbial fuel cell (MFC) was formed. To the best of our knowledge, this is the first study that has utilized P. fragi as a biocatalyst. After the optimization of the working parameters of P. fragi/graphene–Au/CFE bioanode, like the effect of benzoquinone (BQ) on bioanode performance, BQ concentration optimization, P. fragi bacteria amount and graphene–Au hybrid nanomaterial amount optimization, the characteristics of the developed MFC were examined. As a result, 0.169 V OCP, 23.80 μA cm⁻² polarization and 0.50 μW cm⁻² power density values together with remarkable lifetime (28 days) were obtained.