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

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Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes. / Hasan, Kamrul; Reddy, Kesava Vijalapuram Raghava; Essmann, Vera; Gorecki, Kamil; Conghaile, Peter O.; Schuhmann, Wolfgang; Leech, Donal; Hägerhäll, Cecilia; Gorton, Lo.

I: Electroanalysis, Vol. 27, Nr. 1, 2015, s. 118-127.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Harvard

Hasan, K, Reddy, KVR, Essmann, V, Gorecki, K, Conghaile, PO, Schuhmann, W, Leech, D, Hägerhäll, C & Gorton, L 2015, 'Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes', Electroanalysis, vol. 27, nr. 1, s. 118-127. https://doi.org/10.1002/elan.201400456

APA

CBE

Hasan K, Reddy KVR, Essmann V, Gorecki K, Conghaile PO, Schuhmann W, Leech D, Hägerhäll C, Gorton L. 2015. Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes. Electroanalysis. 27(1):118-127. https://doi.org/10.1002/elan.201400456

MLA

Vancouver

Author

Hasan, Kamrul ; Reddy, Kesava Vijalapuram Raghava ; Essmann, Vera ; Gorecki, Kamil ; Conghaile, Peter O. ; Schuhmann, Wolfgang ; Leech, Donal ; Hägerhäll, Cecilia ; Gorton, Lo. / Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes. I: Electroanalysis. 2015 ; Vol. 27, Nr. 1. s. 118-127.

RIS

TY - JOUR

T1 - Electrochemical Communication Between Electrodes and Rhodobacter capsulatus Grown in Different Metabolic Modes

AU - Hasan, Kamrul

AU - Reddy, Kesava Vijalapuram Raghava

AU - Essmann, Vera

AU - Gorecki, Kamil

AU - Conghaile, Peter O.

AU - Schuhmann, Wolfgang

AU - Leech, Donal

AU - Hägerhäll, Cecilia

AU - Gorton, Lo

PY - 2015

Y1 - 2015

N2 - 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 demonstrated that osmium redox polymers (ORPs) could be used for extracellular electron transfer between the cells and electrodes. Recently, heterotrophically grown R. capsulatus has been wired with ORP modified electrodes. Here in this communication, we report electron transfer from R. capsulatus grown under heterotrophic as well as under photoheterotrophic conditions to electrodes. The cells, immobilized on bare graphite and ORP modified graphite electrodes, were excited with visible light and subsequent photosynthetic electron transfer was recorded using cyclic voltammetric and chronoamperometric measurements. Photoheterotrophically grown R. capsulatus cells on bare graphite generate a significant photocurrent density of 3.46 mu A cm(-2), whereas on an ORP modified electrode the current density increases to 8.46 mu A cm(-2). Furthermore, when 1 mM p-benzoquinone is added to the electrolyte the photocurrent density reaches 12.25 mu A cm(-2). Our results could have significant implications in photosynthetic energy conversion and in development of photobioelectrochemical devices.

AB - 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 demonstrated that osmium redox polymers (ORPs) could be used for extracellular electron transfer between the cells and electrodes. Recently, heterotrophically grown R. capsulatus has been wired with ORP modified electrodes. Here in this communication, we report electron transfer from R. capsulatus grown under heterotrophic as well as under photoheterotrophic conditions to electrodes. The cells, immobilized on bare graphite and ORP modified graphite electrodes, were excited with visible light and subsequent photosynthetic electron transfer was recorded using cyclic voltammetric and chronoamperometric measurements. Photoheterotrophically grown R. capsulatus cells on bare graphite generate a significant photocurrent density of 3.46 mu A cm(-2), whereas on an ORP modified electrode the current density increases to 8.46 mu A cm(-2). Furthermore, when 1 mM p-benzoquinone is added to the electrolyte the photocurrent density reaches 12.25 mu A cm(-2). Our results could have significant implications in photosynthetic energy conversion and in development of photobioelectrochemical devices.

KW - Microbial fuel cell

KW - Rhodobacter capsulatus

KW - Photosynthesis

KW - Light

KW - Electrodes

U2 - 10.1002/elan.201400456

DO - 10.1002/elan.201400456

M3 - Article

VL - 27

SP - 118

EP - 127

JO - Electroanalysis

T2 - Electroanalysis

JF - Electroanalysis

SN - 1040-0397

IS - 1

ER -