Unravelling faradaic electrochemical efficiencies over Fe/Co spinel metal oxides using surface spectroscopy and microscopy techniques

Cobalt and iron metal-based oxide catalysts play a significant role in energy devices. To unravel some interesting parameters, we have synthesized metal oxides of cobalt and iron ( i.e. Fe 2 O 3 , Co 3 O 4 , Co 2 FeO 4 and CoFe 2 O 4 ), and measured the effect of the valence band structure, morpholo...

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Veröffentlicht in:	Nanoscale 2022-11, Vol.14 (42), p.15928-15941
Hauptverfasser:	Kashyap, Varchaswal, Pandikassala, Ajmal, Singla, Gourav, Khan, Tuhin Suvra, Ali Haider, M, Vinod, C. P, Kurungot, Sreekumar
Format:	Artikel
Sprache:	eng
Schlagworte:	Band structure of solids Catalysts Chemical reduction Cobalt ferrites Cobalt oxides Composite materials Current density Density functional theory Energy gap Ferric oxide Function analysis Hydrogen evolution reactions Iron Mathematical analysis Metal oxides Nanoparticles Oxygen evolution reactions Oxygen reduction reactions Photoelectrons Spectroscopic analysis Spectrum analysis Ultraviolet spectra Valence band Work functions X ray photoelectron spectroscopy
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Beschreibung
Zusammenfassung:	Cobalt and iron metal-based oxide catalysts play a significant role in energy devices. To unravel some interesting parameters, we have synthesized metal oxides of cobalt and iron ( i.e. Fe 2 O 3 , Co 3 O 4 , Co 2 FeO 4 and CoFe 2 O 4 ), and measured the effect of the valence band structure, morphology, size and defects in the nanoparticles towards the electrocatalytic hydrogen evolution reaction (HER), the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR). The compositional variations in the cobalt and iron precursors significantly alter the particle size from 60 to
ISSN:	2040-3364 2040-3372
DOI:	10.1039/d2nr04170g