Increased carbon dioxide reduction to acetate in a microbial electrosynthesis reactor with a reduced graphene oxide-coated copper foam composite cathode

Abstract

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Highly Porous FexMnOy Microsphere as an Efficient Cathode Catalyst for Microbial Electrosynthesis of Volatile Fatty Acids from CO2

“…This particular result of selective production of VFAs was also noted in the earlier studies using different cathode materials. For example, Aryal et al., 2019 reported bioconversion of acetate as a main component of VFA in the MESs using either copper foam or rGO coated copper foam cathode . The bioelectrochemical conversion of organic acids in MES via multistep metabolic pathways can be possibly justified by well‐established mechanisms.…”

“…For example, Aryal et al, 2019 reported bioconversion of acetate as a main component of VFA in the MESs using either copper foam or rGO coated copper foam cathode. [1] The bioelectro-chemical conversion of organic acids in MES via multistep metabolic pathways can be possibly justified by well-established mechanisms. Production of acetic acid proceeds via Wood-Ljungdahl pathway in which CO 2 first reduces to central metabolite Acetyl-Coenzyme A (CoA) and then transforms to acetate through phosphorylation.…”

“…Microbial electrosynthesis (MES) of valuable organic compounds from CO 2 as feedstock is highly promising novel technology, which is gaining great attention among researchers . MES systems are type of bioelectrochemical system (BES) which uses two reverse polar electrode as anode and cathode placed in either two separated chamber or in the same chamber .…”

“…Microbial electrosynthesis (MES) of valuable organic compounds from CO 2 as feedstock is highly promising novel technology, which is gaining great attention among researchers. [1,2] MES systems are type of bioelectrochemical system (BES) which uses two reverse polar electrode as anode and cathode placed in either two separated chamber or in the same chamber. [3][4][5] Chemolitho-autotrophic microbes embedded in the electroactive biofilm on cathode utilizes CO 2 as sole carbon substrate and electron as reducing equivalent directly or mediated via H 2 or formic acid to produce biochemical or biofuels.…”

A Novel Polyaniline Nanowire Arrays/Three‐Dimensional Graphene Composite for Supercapacitor

“…[32] However, most of the PANI/3D graphene composites used in the current researches are mainly large pore graphene, [33] which shows low mechanical strength and difficult to be freestanding. [34] Herein, a novel method is reported to prepare PANI nanowire arrays (PANI NWAs)/3D graphene composite with small pore sizes and high structural stability by CVD and in-situ polymerization process. Due to the synergistic effect of 3D graphene and PANI NWAs, the composite exhibits excellent electrochemical properties, and is considered to be a successor for supercapacitors.…”