Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 492990
Title Analysis of bio-anode performance through electrochemical
Author(s) Heijne, A. ter; Schaetzle, O.C.; Gimenez, S.; Navarro, L.; Hamelers, B.; Fabregat-Santiago, F.
Source Bioelectrochemistry 106 (2015)part A. - ISSN 1567-5394 - p. 64 - 72.
DOI https://doi.org/10.1016/j.bioelechem.2015.04.002
Department(s) WIMEK
Environmental Technology
Publication type Refereed Article in a scientific journal
Publication year 2015
Abstract In this paper we studied the performance of bioanodes under different experimental conditions using polarization curves and impedance spectroscopy. We have identified that the large capacitances of up to 1 mF·cm- 2 for graphite anodes have their origin in the nature of the carbonaceous electrode, rather than the microbial culture. In some cases, the separate contributions of charge transfer and diffusion resistance were clearly visible, while in other cases their contribution was masked by the high capacitance of 1 mF·cm- 2. The impedance data were analyzed using the basic Randles model to analyze ohmic, charge transfer and diffusion resistances. Increasing buffer concentration from 0 to 50 mM and increasing pH from 6 to 8 resulted in decreased charge transfer and diffusion resistances; lowest values being 144 O·cm2 and 34 O·cm2, respectively. At acetate concentrations below 1 mM, current generation was limited by acetate. We show a linear relationship between inverse charge transfer resistance at potentials close to open circuit and saturation (maximum) current, associated to the Butler–Volmer relationship that needs further exploration.
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