Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes

  title={Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes},
  author={K. Hasan and K. V. Reddy and Vera E{\ss}mann and K. G{\'o}recki and Peter {\'O}. Conghaile and W. Schuhmann and D. Leech and C. H{\"a}gerh{\"a}ll and L. Gorton},
The majority of efforts on microbial and photosynthetic microbial fuel cells are both curiosity driven and made to possibly meet the future growing demand for sustainable energy. The most metabolically versatile purple bacteria Rhodobacter capsulatus is a potential candidate for this purpose. However, utilizing bacteria in such systems requires efficient electronic transfer communication between the microbial cells and the electrodes, which is one of the greatest challenges. Previous studies… Expand
28 Citations
Photoelectrochemical Wiring of Paulschulzia pseudovolvox (Algae) to Osmium Polymer Modified Electrodes for Harnessing Solar Energy
Studies on biological photovoltaics based on intact organisms are challenging and in most cases include diffusing mediators to facilitate electrochemical communication with electrodes. However, usingExpand
Tuning purple bacteria salt-tolerance for photobioelectrochemical systems in saline environments.
Rhodobacter capsulatus' capability to adapt to changing salinity, and effects on bioelectrochemical performance will be presented, as well as major drawbacks and research needs to drive future efforts and discussions. Expand
Purple bacteria & 3-D redox hydrogels for bioinspired photo-bioelectrocatalysis.
An abiotic/biotic photo-anode where a bio-inspired redox mediating system is implemented in a 3-D geometry allowing to "electrically wire" intact bacterial cells is reported, posing the basis for further development of bio-photoanodes for light powered biosensing and power generation. Expand
Direct electricity production from Microalgae Choricystis sp. and investigation of the boron to enhance the electrogenic activity
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Purple bacteria photo-bioelectrochemistry: enthralling challenges and opportunities.
  • Matteo Grattieri
  • Chemistry, Medicine
  • Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2020
The process of harvesting electrons from intact purple bacteria is reviewed, and the perspective of enthralling future research possibilities is presented, placing emphasis on the major challenges in the photo-bioelectrochemistry of purple bacteria. Expand
Photobioelectrocatalysis of Intact Chloroplasts for Solar Energy Conversion
Recently, interest in photosynthetic energy conversion has substantially increased. Chloroplasts, the photosynthetic organelle inside higher plants and algae, are the ultimate source of carbon-basedExpand
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It has been proved that the electricity generation capacity and the ability to adapt to the complex environment of MFC systems constructed by pure microbial cultures are less than the systems constructing by miscellaneous consortia, but pure cultures are useful to clarify the electron transfer mechanism at the microbiological level and further reduce the complexity of mixed communities. Expand
Extracellular electron transfer features of Gram-positive bacteria.
In view of the recent progress in understanding the molecular aspects of the extracellular electron transfer mechanisms of Enterococcus faecalis, the electron transfer properties of this bacterium are especially focused on. Expand
Electron Transfer between the Gram-Positive Enterococcus faecalis Bacterium and Electrode Surface through Osmium Redox Polymers
The interaction between microorganisms that contain thick cell walls, such as the Gram-positive bacterium Enterococcus faecalis, and conductive surfaces can be improved by using redox polymers asExpand
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A comparison of photocurrent density generated by benthic cyanobacteria, that is, two species of Leptolyngbya sp. Expand


Electrochemical communication between heterotrophically grown Rhodobacter capsulatus with electrodes mediated by an osmium redox polymer.
The metabolically versatile purple bacteria Rhodobacter capsulatus was investigated to check its possible applicability in biofuel cells and electrochemical microbial biosensors, and demonstrates that development of photosensors and other light driven bioelectrochemical devices could be feasible using R. Capsulatus. Expand
Photocurrent generation by immobilized cyanobacteria via direct electron transport in photo-bioelectrochemical cells.
The electricity generation capability was significantly enhanced and the power densities achieved in this work are the highest among 'non-engineered' cyanobacteria based electrochemical systems reported to date. Expand
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Five different approaches that integrate photosynthesis with microbial fuel cells-photoMFCs are reviewed, including electrocatalytic bioelectrochemical systems that convert hydrogen from photosynthesis and sediment-based BESs that can convert excreted organics from cyanobacteria or plants. Expand
Bacteria and yeasts as catalysts in microbial fuel cells: electron transfer from micro-organisms to electrodes for green electricity
The different microbial structure and metabolic pathways found in prokaryote and eukaryote that allow the understanding of why electron transfer is possible between a microbe and an electrode are addressed. Expand
Anaerobic respiration in the Rhodospirillaceae: characterisation of pathways and evaluation of roles in redox balancing during photosynthesis
Recent discoveries relating to pathways of anaerobic electron transport in the Rhodospirillaceae are reviewed. The main emphasis is on the organism Rhodobacter capsulatus ∗∗ but comparisons are madeExpand
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Electrical wiring of live, metabolically enhanced Bacillus subtilis cells with flexible osmium-redox polymers.
The results demonstrated that mediators did not have to pass the cytosolic membrane to bring about an efficient electronic communication between bacterial cells with a thick cell wall and electrodes. Expand
A laccase-glucose oxidase biofuel cell prototype operating in a physiological buffer
Abstract Here we report on the design and study of a biofuel cell consisting of a glucose oxidase-based anode ( Aspergillus niger ) and a laccase-based cathode ( Trametes versicolor ) usingExpand
Photosynthesis: a blueprint for solar energy capture and biohydrogen production technologies.
The predicted size of the global energy market and the constraints of global warming upon it are reviewed, before detailing the complex set of biochemical pathways that underlie the photosynthetic process and how they could be modified for improved biohydrogen production. Expand