Plasma-Treated Cobalt-Doped Nanoporous Graphene for Advanced Electrochemical Applications
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in: C – journal of carbon research, Jahrgang 10.2024, Nr. 2, 31, 26.06.2024.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Plasma-Treated Cobalt-Doped Nanoporous Graphene for Advanced Electrochemical Applications
AU - Knabl, Florian
AU - Kostoglou, Nikolaos
AU - Gupta, Ram K.
AU - Tarat, Afshin
AU - Hinder, Steven J.
AU - Baker, Mark
AU - Rebholz, Claus
AU - Mitterer, Christian
N1 - Publisher Copyright: © 2024 by the authors.
PY - 2024/6/26
Y1 - 2024/6/26
N2 - Metal–carbon nanocomposites are identified as key contenders for enhancing water splitting through the oxygen evolution reaction and boosting supercapacitor energy storage capacitances. This study utilizes plasma treatment to transform natural graphite into nanoporous few-layer graphene, followed by additional milling and plasma steps to synthesize a cobalt–graphene nanocomposite. Comprehensive structural characterization was conducted using scanning and transmission electron microscopy, X-ray diffraction, Raman spectroscopy, gas sorption analysis and X-ray photoelectron spectroscopy. Electrochemical evaluations further assessed the materials’ oxygen evolution reaction and supercapacitor performance. Although the specific surface area of the nanoporous carbon decreases from 780 to 480 m 2/g in the transition to the resulting nanocomposite, it maintains its nanoporous structure and delivers a competitive electrochemical performance, as evidenced by an overpotential of 290 mV and a Tafel slope of 110 mV/dec. This demonstrates the efficacy of plasma treatment in the surface functionalization of carbon-based materials, highlighting its potential for large-scale chemical-free application due to its environmental friendliness and scalability, paving the way toward future applications.
AB - Metal–carbon nanocomposites are identified as key contenders for enhancing water splitting through the oxygen evolution reaction and boosting supercapacitor energy storage capacitances. This study utilizes plasma treatment to transform natural graphite into nanoporous few-layer graphene, followed by additional milling and plasma steps to synthesize a cobalt–graphene nanocomposite. Comprehensive structural characterization was conducted using scanning and transmission electron microscopy, X-ray diffraction, Raman spectroscopy, gas sorption analysis and X-ray photoelectron spectroscopy. Electrochemical evaluations further assessed the materials’ oxygen evolution reaction and supercapacitor performance. Although the specific surface area of the nanoporous carbon decreases from 780 to 480 m 2/g in the transition to the resulting nanocomposite, it maintains its nanoporous structure and delivers a competitive electrochemical performance, as evidenced by an overpotential of 290 mV and a Tafel slope of 110 mV/dec. This demonstrates the efficacy of plasma treatment in the surface functionalization of carbon-based materials, highlighting its potential for large-scale chemical-free application due to its environmental friendliness and scalability, paving the way toward future applications.
KW - cobalt
KW - graphene
KW - nanocomposites
KW - nanoporous powders
KW - oxygen evolution reaction
KW - plasma
KW - supercapacitor
KW - water splitting
UR - http://www.scopus.com/inward/record.url?scp=85196887095&partnerID=8YFLogxK
U2 - 10.3390/c10020031
DO - 10.3390/c10020031
M3 - Article
VL - 10.2024
JO - C – journal of carbon research
JF - C – journal of carbon research
SN - 2311-5629
IS - 2
M1 - 31
ER -