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3 results on '"Vandichel M"'

1. Au@UiO-66: a base free oxidation catalyst

Author

Universitat Politècnica de València. Departamento de Química - Departament de Química, Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química, European Commission, Leus, K, Concepción Heydorn, Patricia, Vandichel, M., Meledina, M., Grirrane, Abdessamad, Esquivel, D., Turner, S., Poelman, D., Waroquier, M., Van Speybroeck, V., Van Tendeloo, G., García Gómez, Hermenegildo, Van Der Voort, P., Universitat Politècnica de València. Departamento de Química - Departament de Química, Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química, European Commission, Leus, K, Concepción Heydorn, Patricia, Vandichel, M., Meledina, M., Grirrane, Abdessamad, Esquivel, D., Turner, S., Poelman, D., Waroquier, M., Van Speybroeck, V., Van Tendeloo, G., García Gómez, Hermenegildo, and Van Der Voort, P.

Abstract

[EN] We present the in situ synthesis of Au nanoparticles within the Zr based Metal Organic Framework, UiO-66. The resulting Au@UiO-66 materials were characterized by means of N-2 sorption, XRPD, UV-Vis, XRF, XPS and TEM analysis. The Au nanoparticles (NP) are homogeneously distributed along the UiO-66 host matrix when using NaBH4 or H-2 as reducing agents. The Au@UiO-66 materials were evaluated as catalysts in the oxidation of benzyl alcohol and benzyl amine employing O-2 as oxidant. The Au@MOF materials exhibit a very high selectivity towards the ketone (up to 100%). Regenerability and stability tests demonstrate that the Au@UiO-66 catalyst can be recycled with a negligible loss of Au species and no loss of crystallinity. In situ IR measurements of UiO-66 and Au@UiO-66-NaBH4, before and after treatment with alcohol, showed an increase in IR bands that can be assigned to a combination of physisorbed and chemisorbed alcohol species. This was confirmed by velocity power spectra obtained from the molecular dynamics simulations. Active peroxo and oxo species on Au could be visualized with Raman analysis.

Published
2015

2. Au@UiO-66: a base free oxidation catalyst

Author

Universitat Politècnica de València. Departamento de Química - Departament de Química, Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química, European Commission, Leus, K, Concepción Heydorn, Patricia, Vandichel, M., Meledina, M., Grirrane, Abdessamad, Esquivel, D., Turner, S., Poelman, D., Waroquier, M., Van Speybroeck, V., Van Tendeloo, G., García Gómez, Hermenegildo, Van Der Voort, P., Universitat Politècnica de València. Departamento de Química - Departament de Química, Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química, European Commission, Leus, K, Concepción Heydorn, Patricia, Vandichel, M., Meledina, M., Grirrane, Abdessamad, Esquivel, D., Turner, S., Poelman, D., Waroquier, M., Van Speybroeck, V., Van Tendeloo, G., García Gómez, Hermenegildo, and Van Der Voort, P.

Abstract

[EN] We present the in situ synthesis of Au nanoparticles within the Zr based Metal Organic Framework, UiO-66. The resulting Au@UiO-66 materials were characterized by means of N-2 sorption, XRPD, UV-Vis, XRF, XPS and TEM analysis. The Au nanoparticles (NP) are homogeneously distributed along the UiO-66 host matrix when using NaBH4 or H-2 as reducing agents. The Au@UiO-66 materials were evaluated as catalysts in the oxidation of benzyl alcohol and benzyl amine employing O-2 as oxidant. The Au@MOF materials exhibit a very high selectivity towards the ketone (up to 100%). Regenerability and stability tests demonstrate that the Au@UiO-66 catalyst can be recycled with a negligible loss of Au species and no loss of crystallinity. In situ IR measurements of UiO-66 and Au@UiO-66-NaBH4, before and after treatment with alcohol, showed an increase in IR bands that can be assigned to a combination of physisorbed and chemisorbed alcohol species. This was confirmed by velocity power spectra obtained from the molecular dynamics simulations. Active peroxo and oxo species on Au could be visualized with Raman analysis.

Published
2015

3. Au@UiO-66: a base free oxidation catalyst

Author

Universitat Politècnica de València. Departamento de Química - Departament de Química, Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química, European Commission, Leus, K, Concepción Heydorn, Patricia, Vandichel, M., Meledina, M., Grirrane, Abdessamad, Esquivel, D., Turner, S., Poelman, D., Waroquier, M., Van Speybroeck, V., Van Tendeloo, G., García Gómez, Hermenegildo, Van Der Voort, P., Universitat Politècnica de València. Departamento de Química - Departament de Química, Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química, European Commission, Leus, K, Concepción Heydorn, Patricia, Vandichel, M., Meledina, M., Grirrane, Abdessamad, Esquivel, D., Turner, S., Poelman, D., Waroquier, M., Van Speybroeck, V., Van Tendeloo, G., García Gómez, Hermenegildo, and Van Der Voort, P.

Abstract

[EN] We present the in situ synthesis of Au nanoparticles within the Zr based Metal Organic Framework, UiO-66. The resulting Au@UiO-66 materials were characterized by means of N-2 sorption, XRPD, UV-Vis, XRF, XPS and TEM analysis. The Au nanoparticles (NP) are homogeneously distributed along the UiO-66 host matrix when using NaBH4 or H-2 as reducing agents. The Au@UiO-66 materials were evaluated as catalysts in the oxidation of benzyl alcohol and benzyl amine employing O-2 as oxidant. The Au@MOF materials exhibit a very high selectivity towards the ketone (up to 100%). Regenerability and stability tests demonstrate that the Au@UiO-66 catalyst can be recycled with a negligible loss of Au species and no loss of crystallinity. In situ IR measurements of UiO-66 and Au@UiO-66-NaBH4, before and after treatment with alcohol, showed an increase in IR bands that can be assigned to a combination of physisorbed and chemisorbed alcohol species. This was confirmed by velocity power spectra obtained from the molecular dynamics simulations. Active peroxo and oxo species on Au could be visualized with Raman analysis.

Published
2015

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