Ag Sputter-Deposited on MnO2-Carbon Nanotube Nanocomposites as Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media

As energy demand increases, new energy conversion methods are also sought. In this study, two MnO2 and multiwalled carbon nanotube (MWCNT) composites were prepared and decorated with silver using magnetron sputtering, to evaluate their electrocatalytic activity towards the oxygen reduction reaction...

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Bibliographic Details
Published in:Catalysts 2023-06, Vol.13 (6), p.976
Main Authors: Linge, Jonas Mart, Erikson, Heiki, Ritslaid, Peeter, Kikas, Arvo, Kisand, Vambola, Aruväli, Jaan, Kozlova, Jekaterina, Tamm, Aile, Sarapuu, Ave, Tammeveski, Kaido
Format: Article
Language:English
Subjects:
Adsorption
Ag catalyst
Alternative energy
Carbon
carbon nanotubes
Catalysts
Chemical reactions
Chemical reduction
Electrocatalysts
Energy conversion
Fuel cells
Hydrogen peroxide
Magnetron sputtering
Manganese dioxide
manganese oxide
Metal oxides
Microscopy
Multi wall carbon nanotubes
Nanocomposites
Nanoparticles
Nanowires
Oxidation
oxygen reduction reaction
Oxygen reduction reactions
Particle size
Photoelectrons
Silver
stability
Substrates
Thickness
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Summary:As energy demand increases, new energy conversion methods are also sought. In this study, two MnO2 and multiwalled carbon nanotube (MWCNT) composites were prepared and decorated with silver using magnetron sputtering, to evaluate their electrocatalytic activity towards the oxygen reduction reaction (ORR). Three nominal thicknesses of Ag layers were used, 5, 10 and 20 nm. The physicochemical characterisation was carried out using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, as well as X-ray photoelectron spectroscopy. The substrate materials (MnO2-MWCNT) were also investigated by X-ray diffraction analysis. The electrochemical studies of the ORR revealed that the activity and stability of the composite catalysts depend on the substrate material and the Ag layer thickness.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal13060976