Structural and Magnetic Properties of MnCo₂O₄ Spinel Multiferroic

The joint effect of electrical conductivity and surface oxygen functionalities of carbon supports on the oxygen reduction reaction studied over bare supports and Mn–Co spinel/carbon catalysts in alkaline media

“…The Raman spectra confirm the manganese-cobalt spinel crystal structure and the absence of any spurious oxide phases 65,66 (Fig. 2B).…”

“…67 The Raman spectra of the manganesecobalt spinel samples show only three intense bands (∼189, 494 and 663 cm −1 ), which are related to the incorporation of Mn into the Co 3 O 4 lattice, leading to broadening and shifting in the peak positions towards the lower wavenumber. 65,66 In particular, the observed changes in the shape and position of the A 1g band indicate a successful substitution of Mn 3+ for the octahedral Co 3+ ions. To reveal the dispersion, elemental composition, and morphology of the oxide active phase detailed microscopic (HR) TEM, HAADF STEM, and EDX analyses for the Mn-Co/C-SPH_850 sample were performed (Fig.…”

Synergistic activation of persulfate by a manganese cobalt oxide/reduced graphene oxide nanocomposite with enhanced degradation of trichloroethylene

“…Moreover, the Raman mode at approximately 691 cm −1 (A 1g ) can be attributed to the distinctive characteristics of octahedral (Co-O 6 ) sites, while the mode at around 533 cm −1 (F 3 2g ) corresponds to tetrahedral (Co-O 4 ) sites. 34 These results conrm the successful synthesis of the MnCo 2 O 4 /rGO compound.…”

Effect of Loading and Heating History on Deformation of LaCoO3

“…However, in [13] it was reported that the first order phase transition at~900 • C might occur because of the presence of Co 3 O 4 secondary phase, which precipitates in Co rich regions of LaCoO 3 upon heating. Co 3 O 4 spinel has a higher Young's modulus of 218 GPa [14] and if present might produce a detectable increase in Young's modulus. However, to have such a significant increase as reported in [7,10], a significant amount of Co 3 O 4 (up to 10 vol%) should precipitate upon heating and loading of LaCoO 3 .…”