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Efficient Direct‐Methanol Fuel Cell Based on Graphene Quantum Dots/Multi‐walled Carbon Nanotubes Composite
Author(s) -
Gizem Güneştekin Büşra,
Medetalibeyoglu Hilal,
Atar Necip,
Lütfi Yola Mehmet
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060074
Subject(s) - graphene , carbon nanotube , materials science , raman spectroscopy , fourier transform infrared spectroscopy , methanol fuel , methanol , dielectric spectroscopy , direct methanol fuel cell , scanning electron microscope , quantum dot , chemical engineering , composite number , electrochemistry , nanotechnology , electrode , composite material , chemistry , organic chemistry , anode , physics , engineering , optics
Direct‐methanol fuel cells are proton‐exchange fuel cell in which methanol is used as the fuel. The important advantage of these fuel cells is the simplicity of transport and storage of methanol. In this study, methanol fuel cell electrocatalysts including graphene quantum dots (GQDs), functionalized multi‐walled carbon nanotubes (f‐MWCNTs) and GQDs/f‐MWCNTs composite were synthesized. The structures of synthesized electrocatalysts were highlighted by scanning electron microscope (SEM), raman spectroscopy, UV–vis spectroscopy, fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS) and x‐ray diffraction (XRD) method. After that, the effective surface areas (ESA) of GQDs, f‐MWCNTs and GQDs/f‐MWCNTs were calculated. Finally, GQDs/f‐MWCNTs composite modified glassy carbon electrode (GQDs/f‐MWCNTs/GCE) showed highest current signals for methanol oxidation than those of comparable GQDs/GCE and f‐MWCNTs/GCE.