Abstract
The development and practical implementation of bioelectrochemical systems (BES) requires an in-depth characterisation of their components. The electrodes, which are critical elements, are usually built from carbon-based materials due to their high specific surface area, biocompatibility and chemical stability. In this study, a simple methodology to electrochemically characterise carbon-based electrodes has been developed, derived from conventional electrochemical analyses. Combined with classical electrochemical theory and the more innovative fractal geometry approach, our method is aimed at comparing and characterising the performance of carbon electrodes through the determination of the electroactive surface and its fractal dimension. Overall, this methodology provides a quick and easy method for the screening of suitable electrode materials to be implemented in BES.
Highlights
Bioelectrochemical systems (BES)—an innovative technology in the fields of electrochemistry and bioprocessing technologies [1]—have undergone rapid development, breaking through as promising alternatives in the fields of wastewater treatment [2], bioremediation [3], biosensors construction [4]and chemicals recovery [5].For wastewater treatment and chemicals recovery applications in particular, BES have reached a degree of maturity that has allowed researchers and engineers to bring about the first pilot-scale experiments [6,7]
We present an easy and simple method for a preliminary characterisation of electrode materials for BES
The usual evaluation of electrochemicalof electrochemical area alone does not provide sufficient information to estimate the performance active area alone active does not provide sufficient information to estimate the performance of an electrode
Summary
Bioelectrochemical systems (BES)—an innovative technology in the fields of electrochemistry and bioprocessing technologies [1]—have undergone rapid development, breaking through as promising alternatives in the fields of wastewater treatment [2], bioremediation [3], biosensors construction [4]. For wastewater treatment and chemicals recovery applications in particular, BES have reached a degree of maturity that has allowed researchers and engineers to bring about the first pilot-scale experiments [6,7]. To optimize the reactor’s performance, BES developers often have to face the challenge of selecting the most appropriate electrode materials, since they play a vital role on biolectrochemical reaction rates or energy loses This is not always a straightforward issue since there are a wide variety of potential electrode materials [10]. We present an easy and simple method for a preliminary characterisation of electrode materials for BES It is based on conventional electrochemical techniques and allows for fast and reliable estimation of the active area and electrode surface configuration of electrode materials. The method here proposed is intended to provide researchers and engineers with a tool for a rapid and easy characterization of potentially suitable electrode materials for BES applications
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