One Step Synthesis of Tertiary Co‐doped Graphene Electrocatalyst Using Microalgae Synechococcus elangatus for Applying in Microbial Fuel Cell

In this work, heteroatom‐doped porous graphene was synthesized by pyrolysis method using microalgae Synechococcus elangatus as a biomass resource. The prepared samples were characterized by X‐ray diffraction (XRD), N2 sorption‐desorption, field emission scanning electron microscopy (FESEM) and X‐ray...

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Bibliographic Details
Published in:Fuel cells (Weinheim an der Bergstrasse, Germany) Germany), 2019-10, Vol.19 (5), p.623-634
Main Authors: Sadegh Hassani, S., Ziaedini, A., Samiee, L., Dehghani, M., Mashayekhi, M., Faramarzi, M. A.
Format: Article
Language:English
Subjects:
Algae
Atomic properties
Biochemical fuel cells
Catalytic activity
Crossovers
Electrocatalyst
Electrochemical analysis
Field emission microscopy
Fuel cells
Graphene
Heteroatom‐doped Graphene
Microalgae Synechococcus elangatus
Microbial Fuel Cell
Microorganisms
Oxygen Reduction Reaction
Oxygen reduction reactions
Photoelectrons
Porous Graphene
Pyrolysis
Stability tests
Synergistic effect
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Summary:In this work, heteroatom‐doped porous graphene was synthesized by pyrolysis method using microalgae Synechococcus elangatus as a biomass resource. The prepared samples were characterized by X‐ray diffraction (XRD), N2 sorption‐desorption, field emission scanning electron microscopy (FESEM) and X‐ray photoelectron spectroscopy (XPS). The electrochemical behavior of the synthesized samples was investigated for oxygen reduction reaction (ORR) and evaluated using microbial fuel cell (MFC). The results revealed that the catalytic activity of the prepared sample including N, S and P atoms on porous graphene (PG) was close to the Pt/C 20 wt.%. According to the linear sweep voltammetry (LSV) measurements, the onset potential of optimal sample (0.97 V versus RHE) was close to the Pt/C 20 wt.% (0.99 V versus RHE). Furthermore, the stability test demonstrated much better tolerance to the methanol crossover effects for the optimal sample in comparison to the Pt/C 20 wt.%. Moreover, the microbial fuel cell (MFC) test showed that the cell potential of the optimal sample is close to Pt/C 2 wt.%, and represented a high peak power density of 31.5 mW m−2, which is comparable to the Pt/C 20wt.% (38.6 mW m−2) cathodes, because of synergistic effect of N, S and P co‐doped carbon structure, which leads to improvement in catalytic activity.
ISSN:1615-6846
1615-6854
DOI:10.1002/fuce.201800167