Direct electron transfer and biosensing of glucose oxidase immobilized at multiwalled carbon nanotube-alumina-coated silica modified electrode

This work presented the electrochemical reduction of platinum (Pt) and ruthenium (Ru) nanoparticles within multiwalled carbon nanotube-Nafion (MWCNT-Nafion) composite for electrochemical oxidation of methanol. The structure of the resulting Pt-Ru-MWCNT-Nafion nanocomposite was characterized by scanning electron microscopy, transmission electron microscopy, and energy dispersive X-ray spectroscopy. Electrochemical properties of Pt-Ru-MWCNT-Nafion nanocomposite were investigated by cyclic voltammetry in a 2 M CH3OH + 1 M H2SO4 aqueous solutions. The Pt-Ru-MWCNT-Nafion nanocomposite modified electrode had high electrocatalytic activity and performance toward the methanol electrooxidation as compared with Pt-MWCNT-Nafion nanocomposite modified electrode.

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Simultaneous Determination of Catechol, Hydroquinone, and Resorcinol on CTAB Functionalized Graphene Oxide/Multiwalled Carbon Nanotube Modified Electrode

Fullerenes Nanotubes and Carbon Nanostructures ◽

10.1080/1536383x.2014.924509 ◽

2014 ◽

Vol 23 (5) ◽

pp. 410-417 ◽

Cited By ~ 20

Author(s):

Yu Jun Yang ◽

Li Weikun

Keyword(s):

Graphene Oxide ◽

Carbon Nanotube ◽

Simultaneous Determination ◽

Modified Electrode ◽

Multiwalled Carbon Nanotube ◽

Functionalized Graphene ◽

Multiwalled Carbon ◽

Functionalized Graphene Oxide

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Electrochemical Analysis of Architecturally Enhanced LiFe0.5Mn0.5PO4 Multiwalled Carbon Nanotube Composite

Journal of Nanotechnology ◽

10.1155/2021/6532348 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Sabelo Sifuba ◽

Shane Willenberg ◽

Usisipho Feleni ◽

Natasha Ross ◽

Emmanuel Iwuoha

Keyword(s):

Electron Transfer ◽

Carbon Nanotube ◽

Electrode Materials ◽

Electrochemical Impedance ◽

Electrochemical Analysis ◽

Multiwalled Carbon Nanotube ◽

Spectroscopic Techniques ◽

Redox Potentials ◽

Multiwalled Carbon ◽

Iron Manganese

In this work, the effect of carbon on the electrochemical properties of multiwalled carbon nanotube (MWCNT) functionalized lithium iron manganese phosphate was studied. In an attempt to provide insight into the structural and electronic properties of optimized electrode materials, a systematic study based on a combination of structural and spectroscopic techniques was conducted. The phosphor-olivine LiFe0.5Mn0.5PO4 was synthesized via a simple microwave synthesis using LiFePO4 and LiMnPO4 as precursors. Cyclic voltammetry was used to evaluate the electrochemical parameters (electron transfer and ionic diffusivity) of the LiFe0.5Mn0.5PO4 redox couples. The redox potentials show two separate distinct redox peaks that correspond to Mn2+/Mn3+ (4.1 V vs Li/Li+) and Fe2+/Fe3+ (3.5 V vs Li/Li+) due to interaction arrangement of Fe-O-Mn in the olivine lattice. The electrochemical impedance spectroscopy (EIS) results showed LiFe0.5Mn0.5PO4-MWCNTs have high conductivity with reduced charge resistance. This result demonstrates that MWCNTs stimulate faster electron transfer and stability for the LiFe0.5Mn0.5PO4 framework, which demonstrates to be favorable as a host material for Li+ ions.

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