[Seminar] Bacteria as Living Catalysts at Modified Electrodes: Mechanism and Applications
Frédéric Barrière, Université de Rennes 1, Institut des Sciences Chimiques de Rennes, France
| When |
12 Dec, 2018
from
12:00 pm to 01:00 pm |
|---|---|
| Where | Auditorium |
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Seminar
Title: Bacteria as Living Catalysts at Modified Electrodes: Mechanism and Applications
Speaker: Frédéric Barrière
Affiliation: Université de Rennes 1, Institut des Sciences Chimiques de Rennes, France
Host: Ricardo Louro
Abstract:
The reductionist biomimetic synthesis of active sites of enzymes often fails to produce simple artificial catalysts that compete with the performance and selectivity of enzymes. The direct use of extracted and isolated enzymes at electrodes is possible but suffer from poor catalytic stability in time. I will discuss the use of living micro-organisms as electrode catalysts (SEM micrograph below). We will address the underlying metabolic mechanisms for exo-cellular electron transfer at anodes (e.g. oxidation of acetate) and at cathodes (e.g. reduction of dioxygen). One of our interests in the field of bioelectrochemical systems is the tailoring of the microbial-electrode interface through surface grafting in order to improve the development of electroactive biofilm and its electrical connection. Several examples of surface modification involving electrostatic or more specific interactions will be presented. Possible applications in energy conversion, bioremediation or sensing will be put forward.
