In situ formed graphene nanosheets enhance bidirectional electron transfer in bioelectrochemical systems

Abstract

Bioelectrochemical systems (BES) possess great potential for simultaneous wastewater treatment and energy recovery.

Advances in Anode Materials for Microbial Fuel Cells

“…When Gr was electrodeposited onto Ni electrodes, the power density achieved by the resulting MFC was 25.83 times higher than that of the bare Ni anode. [ 75 ] In addition, in situ modification of anodes by electrochemical stripping [ 76 ] and microbial catalysis [ 77 ] resulted in stronger Gr adhesion, which provided a simple and effective method to improve the performance of MFCs. However, anode modification with Gr must consider the inhibitory effect of its sharp edges and rapidly generated reactive oxygen species (ROS) on the growth of bacteria on the electrode.…”

Elongated Riboflavin‐Producing Shewanellaoneidensis in a Hybrid Biofilm Boosts Extracellular Electron Transfer

“…Composite materials based on graphene/CNTs have been prepared by different means, including chemical vapor deposition, [ 17 ] electrophoretic deposition, [ 18 ] microwave energy‐assisted unzipping process, [ 19 ] coating membrane, [ 20 ] and in situ chemical reduction. [ 21 ] For example, nitrogen doped CNTs can achieve a power density of 1137 mW m −2 by doping reduced graphene oxide and polyaniline as anodes of fuel cells. [ 22 ] A nitrogen‐doped MWCNT@GONR (N‐MWCNT@GONR) were synthesized through a microwave energy‐assisted unzipping process with a core–shell structure significantly reduced the charge transfer resistance, resulting in MFC output power of up to 3444 mW m −2 .…”