Photo-electrochemical communication between cyanobacteria (Leptolyngbia sp.) and osmium redox polymer modified electrodes

Hasan, Kamrul; Yıldız, Hüseyin Bekir; Sperling, Eva; Conghaile, Peter Ó; Packer, Michael A.; Leech, Dónal; Hägerhäll, Cecilia; Gorton, Lo

doi:10.1039/c4cp04307c

Cited by 85 publications

(98 citation statements)

References 32 publications

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Section: Surface Chemistry In Microbial Bes Designmentioning

confidence: 99%

“…In addition to modifying electrode surfaces, use of redox and/or conducting polymers [90][91] and/or nanomaterials could also be explored to electrically wire microorganisms to electrodes, including connecting metabolic processes inside cells to electrodes outside cells in a manner analogous to that used to wire redox enzymes to electrode surfaces [92][93] . This is an under-exploited approach to engineering microbial BES which may expand the scope of useable microorganisms to those with interesting/useful catalytic properties but that lack ability to electrically wire themselves to electrodes [94][95] .Although the EET mechanisms may be different, surface modifications that promote biofilm formation on anodes tend to benefit biofilm formation on cathodes as well. For instance, introduction of positive charged functional groups at carbon cloth electrodes significantly improves formation and performance of Sporomusa ovate films used for electrosynthetic production of acetate in a microbial electrolysis cell [96][97] .…”

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The ins and outs of microorganism–electrode electron transfer reactions

et al. 2017

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Microbial-electrode electron transfer is a mechanism by which microbes make their living coupling to electronic circuits, even across long distances. From a chemistry perspective, it represents a model platform that integrates biological metabolism with artificial electronics, and will facilitate the fundamental understanding of charge transport properties within these distinct chemical systems and particularly at their interfaces. From a broad standpoint, this understanding will also open up new possibilities in a wide range of high impact applications in bioelectrochemical system based technologies, which have shown promise in electricity, biochemical, chemical feedstock production but still require many orders of magnitude improvement to lead to viable technologies. Here we review opportunities to understand microbial-electrode electron transfer to improve electrocatalysis (bioelectricity) and electrosynthesis (biochemical and chemical production). We discuss challenges and the ample interdisciplinary research opportunities and suggest paths to take to improve production of fuels and chemicals at high yield and efficiency and the new applications that may result from increased understanding of the microbial-electrode electron transfer mechanism.Bio-electrochemical system (BES) can be expressed as the bidirectional electron transports between biotic and abiotic components, where the redoxactive microorganisms or bio-macromolecules act as the catalysts that facilitate the exchange process 1 . A glossary of important terms is provided in box 1. A model system of BES that has been widely studies is the Microbial Fuel Cell (MFCs). Similar to the conventional fuel cell, the microorganisms can transport electrons to the anodes of MFC after oxidizing the electron donors, thus generating the electrical flow toward the cathode 2 . Meanwhile, certain microorganisms are also known for their capability to reduce the electron acceptors such as nitrate, perchlorate or metals in the cathodes 3 . Other BESs such as Microbial electrolysis cells (MEC), Microbial electrosynthesis (MES),Microbial solar cells (MSCs), and Plant microbial fuel cells (PMFCs) also share similar electron transport strategy. These direct electron transport processes created a novel and promising possibility to bridge the fundamental researches in microbiology, electrochemistry, environmental engineering, material science and the applications in waste remediation & resource recovery, sustainable energy production, and bio-inspired material development. The basic working principles and the applications of these different BESs have been comprehensively reviewed by many different groups [4][5][6][7] . Bioelectrochemcial systemsEnzymatic electron transport process is one of the earliest BES models which received extensive attention due to the interests in development of amperometric biosensors and enzymatic fuel cell in late 20 th century [8][9][10][11][12] . In this system, the electrons generated from specific enzymatic reactions can be either...

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Section: Surface Chemistry In Microbial Bes Designmentioning

confidence: 99%

mentioning

confidence: 99%

The ins and outs of microorganism–electrode electron transfer reactions

et al. 2017

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“…[9][10][11][12][13] Al ong-term approachi so bviously to work with intact photosynthetic organisms (algae, cyanobacteria, …). [14][15][16] In this case, culture and proliferationo ft he photosynthetic cells is expecteda nd ensure the stabilityo ft he bioelectricity production. [17] However,t he restricted access to the photosynthetic chain could limit the efficiency of the electrons harvesting.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Mechanism Involving Michaelis–Menten Kinetics at the Preparative Scale: Theory and Applicability to Photocurrents from a Photosynthetic Algae Suspension With Quinones

2017

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In the past years, many strategies have been implemented to benefit from oxygenic photosynthesis to harvest photosynthetic electrons and produce a significant photocurrent. Therefore, electrochemical tools were considered and have globally relied on the electron transfer(s) between the photosynthetic chain and a collecting electrode. In this context, we recently reported the implementation of an electrochemical set‐up at the preparative scale to produce photocurrents from a Chlamydomonas reinhardtii algae suspension with an appropriate mediator (2,6‐DCBQ) and a carbon gauze as the working electrode. In the present work, we wish to describe a mathematical modeling of the recorded photocurrents to better understand the effects of the experimental conditions on the photosynthetic extraction of electrons. In that way, we established a general model of an electrocatalytic mechanism at the preparative scale (that is, assuming a homogenous bulk solution at any time and a constant diffusion layer, both assumptions being valid under forced convection) in which the chemical step involves a Michaelis–Menten‐like behaviour. Dependences of transient and steady‐state corresponding currents were analysed as a function of different parameters by means of zone diagrams. This model was tested to our experimental data related to photosynthesis. The corresponding results suggest that competitive pathways beyond photosynthetic harvesting alone should be taken into account.

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“…Cyanobacteria such as Synechococcus elongatus, 20 Synechocystis sp., 21,22 Nostoc sp., 23 Anabaena variabilis, 24 and Spirulina platensis 25 and green algae such as Chlamydomonas reinhardtii, 26 Chlorella vulgaris, 27 and Ulva lactuca 27 are employed in the PMFC for light induced electric current generation. Compared to growing the culture of cyanobacteria in PMFCs with bare untreated electrodes, 22 growing cyanobacterial biofilm or immobilizing the cyanobacterial cells onto electrodes modified with nanostructure based support matrix such as polyaniline, 28 polypyrrole, 29 multi-walled carbon nanotubes, 23 and electrodes modified with osmium redox polymer, 30 indium tin oxide 31 have been shown to significantly improve the power density. When such an anode is combined with an oxygen reducing cathode, the oxygen evolved in photosynthesis would be subsequently reduced at the cathode and the entire system would be completely sustainable, environment friendly and requires only water and light for the generation of electricity.…”

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Photosynthetic Energy Conversion: Recent Advances and Future Perspective

Sekar

Ramasamy

2015

Interface magazine

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Photosynthesis is the most important natural process on earth, which transformed the once lifeless planet into a living world. While primitive photosynthetic bacteria such as purple sulfur bacteria and green sulfur bacteria carry out anoxygenic photosynthesis, producing elemental sulfur from hydrogen sulfide with the help of sunlight, cyanobacteria, algae and plants carry out oxygenic photosynthesis to convert water and carbon dioxide to sugars with the help of sunlight and release oxygen as a byproduct. The conversion of solar energy to chemical energy via photosynthesis with the release of oxygen has an evolutionary significance on life as we know it today. In fact, photosynthesis is the only natural process known on earth to form oxygen from water. Further, fossil fuels such as coal, petroleum and natural gas are formed from the remains of the dead plants by exposure to heat and pressure in the earth's crust over millions of years. With increasing energy crisis and environmental issues lately, now is the time to revisit photosynthesis in order to address these issues. In this context, a great deal of ongoing research is focused on utilizing photosynthetic energy conversion as a renewable, self-sustainable and environment friendly source of energy. When compared to the finite reserve of fossil fuels, sunlight, the energy source for photosynthesis, is abundant around the planet and is inexhaustible.The earth receives solar energy at the rate of about 120,000 TW, which far exceeds our current global demand of ~16 TW.1 However the only major technology available for solar energy conversion is photovoltaics (PV). PV devices such as solar panels generate electrical power by converting solar radiation into direct current electricity using semiconductors. Solar cells include first generation conventional wafer-based cells made up of crystalline silicon (Fig. 1a), second generation thin film solar cells (Fig. 1b)

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Photo-electrochemical communication between cyanobacteria (Leptolyngbia sp.) and osmium redox polymer modified electrodes

Cited by 85 publications

References 32 publications

The ins and outs of microorganism–electrode electron transfer reactions

The ins and outs of microorganism–electrode electron transfer reactions

Electrocatalytic Mechanism Involving Michaelis–Menten Kinetics at the Preparative Scale: Theory and Applicability to Photocurrents from a Photosynthetic Algae Suspension With Quinones

Photosynthetic Energy Conversion: Recent Advances and Future Perspective

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