MXene-coated biochar as potential biocathode for improved microbial electrosynthesis system

Tahir, Khurram; Miran, Waheed; Jang, Jiseon; Maile, Nagesh; Shahzad, Asif; Moztahida, Mokrema; Ghani, Ahsan Abdul; Kim, Bolam; Jeon, Hye Won

doi:10.1016/j.scitotenv.2021.145677

Cited by 28 publications

(22 citation statements)

References 51 publications

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“…The SEM analysis showed a more smooth and plain electrode surface for the uncoated CF (Figure 2A), whereas TpPa‐1@CF (Figure 2B‐D) exhibited an aggregated petal‐shaped morphology, 42 presenting a rougher electrode surface and facilitating the microbial adhesion 41,43 . Numerous pores in the TpPa‐1 structure could retain the substantial water content, thus improving the nutrient accessibility for the microbial cells 16 …”

Section: Resultsmentioning

confidence: 99%

“…41,43 Numerous pores in the TpPa-1 structure could retain the substantial water content, thus improving the nutrient accessibility for the microbial cells. 16 Moreover, the multilayered TpPa-1 structure could support more substrate diffusion than monolayered COF ones, yielding an improved bioanode enrichment. 31 Furthermore, the spectrum of Energy Dispersive x-ray spectroscopy showed the successful CF modification with TpPa-1 (Figure 2E).…”

Section: Electrode Characterizationmentioning

confidence: 99%

“…Conductive polymers lack ordered porous structure and exhibit low specific surface area, which is important for mass transport and microbial growth. 16 Whereas metals and metal oxides suffer from corrosion and are not suitable for long-term operation. 17 The material selection is conclusive and must meet all necessary requirements.…”

Section: Introductionmentioning

confidence: 99%

“…Although conductive polymers (polyaniline and polypyrrole), metals (Pt, Ti, and Ag), and metal oxides (Fe 3 O 4 , MnO 2 , and Co 2 O 3 ) have been widely used for anode fabrication, however, such electrode materials present certain limitations. Conductive polymers lack ordered porous structure and exhibit low specific surface area, which is important for mass transport and microbial growth 16 . Whereas metals and metal oxides suffer from corrosion and are not suitable for long‐term operation 17 .…”

Section: Introductionmentioning

confidence: 99%

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Microbially catalyzed enhanced bioelectrochemical performance using covalent organic framework‐modified anode in a microbial fuel cell

Tahir

Hussain

Maile

et al. 2022

Intl J of Energy Research

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Electrode modification is crucial in improving the power density and bioelectrochemical performance of a microbial fuel cell (MFC). The conventional carbon felt (CF) surface was modified as an anode in this study to examine an emerging class of materials known as covalent organic framework (COF). In a three-electrode system, the performance of the modified anode (TpPa-1@CF) was evaluated using various physical and bioelectrochemical techniques, demonstrating superior bioelectrochemical activity (cyclic voltammetry), reduced electrode resistance (electrochemical spectroscopy), and excellent electrode stability (chronoamperometry). With a 4.3 and 12.7-fold improvement in power (1069 mW/m 2 ) and current (1954 mA/m 2 ) density and steady MFC performance as compared to the uncoated electrode throughout five MFC cycles, TpPa-1@CF demonstrated better bioelectrochemical activity. Furthermore, the rough electrode surface area and numerous catalytically active sites of TpPa-1@CF promoted the microbial growth/adhesion along with substrate fluxes yielding the selective enrichment of Proteobacteria and Bacteroidetes (electricity-producing phyla). These results indicated that TpPa-1@CF is a promising anode material for several bioelectrochemical applications.

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Section: Resultsmentioning

confidence: 99%

Section: Electrode Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microbially catalyzed enhanced bioelectrochemical performance using covalent organic framework‐modified anode in a microbial fuel cell

Tahir

Hussain

Maile

et al. 2022

Intl J of Energy Research

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“…Kondaveeti and their team [123] utilised biocathode in BES to reduce CO 2 to form products (methane, VFAs and alcohols). Tahir and his team [124] used MXene-coated biochar as an MES biocathode for selective VFA production. Improvement of the biofilm development, attachment of bacterial cell, rate of e − transfer at cathode surface, as well as the rate of chemical production, requires key elements like best cathode materials, selective microbial groups and well-organised reactor design.…”

Section: Cathode Fabricationmentioning

confidence: 99%

Valorisation of CO2 into Value-Added Products via Microbial Electrosynthesis (MES) and Electro-Fermentation Technology

et al. 2021

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Microbial electrocatalysis reckons on microbes as catalysts for reactions occurring at electrodes. Microbial fuel cells and microbial electrolysis cells are well-known in this context; both prefer the oxidation of organic and inorganic matter for producing electricity. Notably, the synthesis of high energy-density chemicals (fuels) or their precursors by microorganisms using bio-cathode to yield electrical energy is called Microbial Electrosynthesis (MES), giving an exceptionally appealing novel way for producing beneficial products from electricity and wastewater. This review accentuates the concept, importance and opportunities of MES, as an emerging discipline at the nexus of microbiology and electrochemistry. Production of organic compounds from MES is considered as an effective technique for the generation of various beneficial reduced end-products (like acetate and butyrate) as well as in reducing the load of CO2 from the atmosphere to mitigate the harmful effect of greenhouse gases in global warming. Although MES is still an emerging technology, this method is not thoroughly known. The authors have focused on MES, as it is the next transformative, viable alternative technology to decrease the repercussions of surplus carbon dioxide in the environment along with conserving energy.

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Nanomaterials Facilitating Conversion Efficiency Strategies for Microbial CO₂ Reduction

Tian

Jiang

Cao

et al. 2022

Chemistry A European J

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Microbial electro-and photoelectrochemical CO 2 reduction represents an opportunity to tackle the environmental demand for sustainable fuel production. Nanomaterials critically impact the electricity-and solar-driven microbial CO 2 reduction processes. This minireview comprehensively summarizes the recent developments in the configuration and design of nanomaterials for enhancement of the bacterial adhesion and extracellular electron transfer (EET) processes, based on the modification technologies of improving chemical stability, electrochemical conductivity, biocompatibility, and surface area. Furthermore, the investigation of incorporating non-photosynthetic microorganisms using advanced light-harvesting nanostructured photoelectrodes for solar-tochemical conversion, as well as the current understanding of EET mechanisms occurring at photosynthetic semiconductor nanomaterials-bacteria biohybrid interface is detailed. The crucial factors influencing the performance of microbial CO 2 reduction systems and future perspectives are discussed to provide guidance for the realization of their large-scale application.

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MXene-coated biochar as potential biocathode for improved microbial electrosynthesis system

Cited by 28 publications

References 51 publications

Microbially catalyzed enhanced bioelectrochemical performance using covalent organic framework‐modified anode in a microbial fuel cell

Microbially catalyzed enhanced bioelectrochemical performance using covalent organic framework‐modified anode in a microbial fuel cell

Valorisation of CO2 into Value-Added Products via Microbial Electrosynthesis (MES) and Electro-Fermentation Technology

Nanomaterials Facilitating Conversion Efficiency Strategies for Microbial CO₂ Reduction

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MXene-coated biochar as potential biocathode for improved microbial electrosynthesis system

Cited by 28 publications

References 51 publications

Microbially catalyzed enhanced bioelectrochemical performance using covalent organic framework‐modified anode in a microbial fuel cell

Microbially catalyzed enhanced bioelectrochemical performance using covalent organic framework‐modified anode in a microbial fuel cell

Valorisation of CO2 into Value-Added Products via Microbial Electrosynthesis (MES) and Electro-Fermentation Technology

Nanomaterials Facilitating Conversion Efficiency Strategies for Microbial CO2 Reduction

Contact Info

Product

Resources

About

Nanomaterials Facilitating Conversion Efficiency Strategies for Microbial CO₂ Reduction