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Your search keyword '"Eschemann, Thomas O."' showing total 13 results
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13 results on '"Eschemann, Thomas O."'

4. In-Situ 2p3d Resonant Inelastic X-ray Scattering Tracking Cobalt Nanoparticle Reduction

Author

Liu, Boyang, Van Schooneveld, Matti M., Cui, Yi Tao, Miyawaki, Jun, Harada, Yoshihisa, Eschemann, Thomas O., De Jong, Krijn P., Delgado-Jaime, Mario U., De Groot, Frank M.F., Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, and Sub Inorganic Chemistry and Catalysis

Subjects
Materials science, Absorption spectroscopy, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Article, Spectral line, Coatings and Films, Energy(all), Electronic, Optical and Magnetic Materials, Physical and Theoretical Chemistry, Cobalt oxide, X-ray absorption spectroscopy, Scattering, Monoxide, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Surfaces, Resonant inelastic X-ray scattering, General Energy, chemistry, 0210 nano-technology, Cobalt
Abstract

In-situ carbon-thermal reduction of cobalt oxide nanoparticles supported on carbon nanotubes was studied by cobalt 2p3d resonant inelastic X-ray scattering (RIXS). The in-situ 2p X-ray absorption spectroscopy (XAS) and RIXS measurements were performed at 500, 600, and 700 °C, where four consistent excitation energies were used for RIXS acquisitions. After 700 °C reduction, the XAS spectrum shows a cobalt metal-like shape, while the RIXS spectra reveal the minority cobalt monoxide phase. The holistic fit on both XAS and RIXS data reveals the respective contributions from metal and monoxide. We show that the relative precision to determine the monoxide content changes from ∼5.6% in XAS results to better than 0.8% in the RIXS analysis, suggesting that RIXS is a useful tool to track the oxidation state of nanoparticles under in situ conditions. We determined a relative radiative ratio (P) factor of approximately 5, where this factor gives the ratio between the relative strengths of the radiative decay channels compared to the nonradiative channels in CoO and Co metal.

Published
2017

5. In-Situ 2p3d Resonant Inelastic X-ray Scattering Tracking Cobalt Nanoparticle Reduction

Author

Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Liu, Boyang, Van Schooneveld, Matti M., Cui, Yi Tao, Miyawaki, Jun, Harada, Yoshihisa, Eschemann, Thomas O., De Jong, Krijn P., Delgado-Jaime, Mario U., De Groot, Frank M.F., Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Liu, Boyang, Van Schooneveld, Matti M., Cui, Yi Tao, Miyawaki, Jun, Harada, Yoshihisa, Eschemann, Thomas O., De Jong, Krijn P., Delgado-Jaime, Mario U., and De Groot, Frank M.F.

Published
2017

6. Effects of noble metal promotion for Co/TiO2 Fischer-Tropsch catalysts

Author

Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Eschemann, Thomas O., Oenema, Jogchum, de Jong, Krijn P., Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Eschemann, Thomas O., Oenema, Jogchum, and de Jong, Krijn P.

Published
2016

7. In-Situ 2p3d Resonant Inelastic X-ray Scattering Tracking Cobalt Nanoparticle Reduction

Author

Liu, Boyang, van Schooneveld, Matti M., Cui, Yi-Tao, Miyawaki, Jun, Harada, Yoshihisa, Eschemann, Thomas O., de Jong, Krijn P., Delgado-Jaime, Mario U., and de Groot, Frank M. F.

Abstract

In-situ carbon-thermal reduction of cobalt oxide nanoparticles supported on carbon nanotubes was studied by cobalt 2p3d resonant inelastic X-ray scattering (RIXS). The in-situ 2p X-ray absorption spectroscopy (XAS) and RIXS measurements were performed at 500, 600, and 700 °C, where four consistent excitation energies were used for RIXS acquisitions. After 700 °C reduction, the XAS spectrum shows a cobalt metal-like shape, while the RIXS spectra reveal the minority cobalt monoxide phase. The holistic fit on both XAS and RIXS data reveals the respective contributions from metal and monoxide. We show that the relative precision to determine the monoxide content changes from ∼5.6% in XAS results to better than 0.8% in the RIXS analysis, suggesting that RIXS is a useful tool to track the oxidation state of nanoparticles under in situ conditions. We determined a relative radiative ratio (P) factor of approximately 5, where this factor gives the ratio between the relative strengths of the radiative decay channels compared to the nonradiative channels in CoO and Co metal.

Published
2024
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8. Effect of support surface treatment on the synthesis, structure, and performance of Co/CNT Fischer-Tropsch catalysts

Author

Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Eschemann, Thomas O., Lamme, Wouter S., Manchester, Rene L., Parmentier, Tanja E., Cognigni, Andrea, Ronning, Magnus, de Jong, Krijn P., Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Eschemann, Thomas O., Lamme, Wouter S., Manchester, Rene L., Parmentier, Tanja E., Cognigni, Andrea, Ronning, Magnus, and de Jong, Krijn P.

Published
2015

13. In-Situ 2p3d Resonant Inelastic X-ray Scattering Tracking Cobalt Nanoparticle Reduction.

Author

Liu B, van Schooneveld MM, Cui YT, Miyawaki J, Harada Y, Eschemann TO, de Jong KP, Delgado-Jaime MU, and de Groot FMF

Abstract

In-situ carbon-thermal reduction of cobalt oxide nanoparticles supported on carbon nanotubes was studied by cobalt 2p3d resonant inelastic X-ray scattering (RIXS). The in-situ 2p X-ray absorption spectroscopy (XAS) and RIXS measurements were performed at 500, 600, and 700 °C, where four consistent excitation energies were used for RIXS acquisitions. After 700 °C reduction, the XAS spectrum shows a cobalt metal-like shape, while the RIXS spectra reveal the minority cobalt monoxide phase. The holistic fit on both XAS and RIXS data reveals the respective contributions from metal and monoxide. We show that the relative precision to determine the monoxide content changes from ∼5.6% in XAS results to better than 0.8% in the RIXS analysis, suggesting that RIXS is a useful tool to track the oxidation state of nanoparticles under in situ conditions. We determined a relative radiative ratio ( P ) factor of approximately 5, where this factor gives the ratio between the relative strengths of the radiative decay channels compared to the nonradiative channels in CoO and Co metal.

Published
2017
Full Text
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