Surface modification of Co3O4 nanocubes with TEOS for an improved performance in the Fischer-Tropsch synthesis

Macheli, Lebohang; Roy, Amitava; Carleschi, Emanuela; Doyle, Bryan P.; Steen, Eric van

doi:10.1016/j.cattod.2018.10.018

Cited by 15 publications

(6 citation statements)

References 46 publications

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“…The FTIR spectrum in the pyridine region is presented in Figure 6 along with that of the ALPS support previously discussed. [49][50][51][52][53][54][55][56][57]. This is in agreement with XRD analysis that identified this spinel oxide as the only cobalt crystalline phase in the calcined material.…”

Section: Catalysis Science and Technology Accepted Manuscriptsupporting

confidence: 83%

“…In the case of sample CRALPS, the slight shift of both Co 2p peaks maxima towards higher BE, besides the higher intensity of the Co 2p shake-up satellites, indicate that this catalyst contains a higher proportion of paramagnetic Co 2+ species compared to CRLPS. Indeed, the Co 2p spectrum can be fitted with a split component at 781.9 and 797.4 eV, which can be ascribed to Co 2p 3/2 and 2p 1/2 peaks of cobalt aluminate [51][52][53][54][55][56][57][58][59][60], in addition to the peaks assigned to the Co 3 O 4 phase. The relative peak areas (Table 2) indicate a notably higher proportion of Co in the aluminate phase with respect to the oxide.…”

Section: Catalysis Science and Technology Accepted Manuscriptmentioning

confidence: 99%

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Short-channel mesoporous SBA-15 silica modified by aluminum grafting as a support for CoRu Fischer–Tropsch synthesis catalysts

Mohammadnasabomran

Márquez‐Álvarez

Pérez‐Pariente

et al. 2021

Catal. Sci. Technol.

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Section: Catalysis Science and Technology Accepted Manuscriptsupporting

confidence: 83%

Section: Catalysis Science and Technology Accepted Manuscriptmentioning

confidence: 99%

Short-channel mesoporous SBA-15 silica modified by aluminum grafting as a support for CoRu Fischer–Tropsch synthesis catalysts

Mohammadnasabomran

Márquez‐Álvarez

Pérez‐Pariente

et al. 2021

Catal. Sci. Technol.

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“…Scandium, iron, and germanium K -edge X-ray absorption near edge structure (XANES) spectroscopic measurements were performed at the J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD) electron storage ring at Louisiana State University. Measurement details are very similar to those provided in the previous reports 27,28 . All measurements were made in transmission mode, and the data analysis was performed with Athena 29 .…”

Section: Methodssupporting

confidence: 58%

Helical magnetic order and Fermi surface nesting in non-centrosymmetric ScFeGe

Karna,

Tristant,

Hebert

et al. 2020

Preprint

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An investigation of the structural, magnetic, thermodynamic, and charge transport properties of non-centrosymmetric hexagonal ScFeGe reveals it to be an anisotropic metal with a transition to a weak itinerant incommensurate helimagnetic state below TN = 36 K. Neutron diffraction measurements discovered a temperature and field independent helical wavevector k = (0 0 0.193) with magnetic moments of 0.53 µB per formula unit confined to the ab-plane. Density functional theory calculations are consistent with these measurements and find several bands that cross the Fermi level along the c-axis with a nearly degenerate set of flat bands just above the Fermi energy. The anisotropy found in the electrical transport is reflected in the calculated Fermi surface, which consists of several warped flat sheets along the c-axis with two regions of significant nesting, one of which has a wavevector that closely matches that found in the neutron diffraction. The electronic structure calculations, along with a strong anomaly in the c-axis conductivity at TN , signal a Fermi surface driven magnetic transition, similar to that found in spin density wave materials. Magnetic fields applied in the ab-plane result in a metamagnetic transition with a threshold field of ≈ 6.7 T along with a sharp, strongly temperature dependent, discontinuity and a change in sign of the magnetoresistance for in-plane currents. Thus, ScFeGe is an ideal system to investigate the effect of in-plane magnetic fields on an easy-plane magnetic system, where the relative strength of the magnetic interactions and anisotropies determine the topology and magnetic structure.

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“…Scandium, iron, and germanium K-edge x-ray absorption near edge structure (XANES) spectroscopic measurements were performed at the J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD) electron storage ring at Louisiana State University. Measurement details are very similar to those provided in the previous reports [30,31]. All measurements were made in transmission mode, and the data analysis was performed with Athena [32].…”

Section: E X-ray Absorption Spectroscopy Measurementsmentioning

confidence: 96%

Helical magnetic order and Fermi surface nesting in noncentrosymmetric ScFeGe

Karna¹,

Tristant²,

Hebert³

et al. 2021

Phys. Rev. B

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An investigation of the structural, magnetic, thermodynamic, and charge transport properties of noncentrosymmetric hexagonal ScFeGe reveals it to be an anisotropic metal with a transition to a weak itinerant incommensurate helimagnetic state below T N = 36 K. Neutron diffraction measurements discovered a temperature and field independent helical wave vector k = (0 0 0.193) with magnetic moments of 0.53 μ B per Fe confined to the ab plane. Density functional theory calculations are consistent with these measurements and find several bands that cross the Fermi level along the c axis with a nearly degenerate set of flat bands just above the Fermi energy. The anisotropy found in the electrical transport is reflected in the calculated Fermi surface, which consists of several warped flat sheets along the c axis with two regions of significant nesting, one of which has a wave vector that closely matches that found in the neutron diffraction. The electronic structure calculations, along with a strong anomaly in the c-axis conductivity at T N , signal a Fermi surface driven magnetic transition, similar to that found in spin density wave materials. Magnetic fields applied in the ab plane result in a metamagnetic transition with a threshold field of ≈6.7 T along with a sharp, strongly temperature dependent discontinuity and a change in sign of the magnetoresistance for in-plane currents. Thus, ScFeGe is an ideal system to investigate the effect of in-plane magnetic fields on a helimagnet with a c-axis propagation vector, where the relative strength of the magnetic interactions and anisotropies determine the topology and magnetic structure.

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Surface modification of Co3O4 nanocubes with TEOS for an improved performance in the Fischer-Tropsch synthesis

Cited by 15 publications

References 46 publications

Short-channel mesoporous SBA-15 silica modified by aluminum grafting as a support for CoRu Fischer–Tropsch synthesis catalysts

Short-channel mesoporous SBA-15 silica modified by aluminum grafting as a support for CoRu Fischer–Tropsch synthesis catalysts

Helical magnetic order and Fermi surface nesting in non-centrosymmetric ScFeGe

Helical magnetic order and Fermi surface nesting in noncentrosymmetric ScFeGe

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