Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane Combustion
The control of catalytic performance using synthesis conditions is one of the main goals of catalytic research. Two series of Pt-Ti/SBA-15 catalysts with different TiO<sub>2</sub> percentages (<i>n</i> = 1, 5, 10, 30 wt.%) were obtained from tetrabutylorthotitanate (TBOT) and...
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MDPI AG
2023-05-01
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| Online Access: | https://www.mdpi.com/2079-4991/13/10/1647 |
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| author | Mihaela Filip Elena Maria Anghel Vasile Rednic Florica Papa Simona Somacescu Cornel Munteanu Nicolae Aldea Jing Zhang Viorica Parvulescu |
| author_facet | Mihaela Filip Elena Maria Anghel Vasile Rednic Florica Papa Simona Somacescu Cornel Munteanu Nicolae Aldea Jing Zhang Viorica Parvulescu |
| author_sort | Mihaela Filip |
| collection | DOAJ |
| description | The control of catalytic performance using synthesis conditions is one of the main goals of catalytic research. Two series of Pt-Ti/SBA-15 catalysts with different TiO<sub>2</sub> percentages (<i>n</i> = 1, 5, 10, 30 wt.%) were obtained from tetrabutylorthotitanate (TBOT) and peroxotitanate (PT), as titania precursors and Pt impregnation. The obtained catalysts were characterized using X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), N<sub>2</sub> sorption, Raman, X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), hydrogen temperature-programmed reduction (H<sub>2</sub>-TPR) and H<sub>2</sub>-chemisorption measurements. Raman spectroscopy showed framework titanium species in low TiO<sub>2</sub> loading samples. The anatase phase was evidenced for samples with higher titania loading, obtained from TBOT, and a mixture of rutile and anatase for those synthesized by PT. The rutile phase prevails in rich TiO<sub>2</sub> catalysts obtained from PT. Variable concentrations of Pt<sup>0</sup> as a result of the stronger interaction of PtO with anatase and the weaker interaction with rutile were depicted using XPS. TiO<sub>2</sub> loading and precursors influenced the concentration of Pt species, while the effect on Pt nanoparticles’ size and uniform distribution on support was insignificant. The Pt/PtO ratio and their concentration on the surface were the result of strong metal–support interaction, and this influenced catalytic performance in the complete oxidation of methane at a low temperature. The highest conversion was obtained for sample prepared from PT with 30% TiO<sub>2</sub>. |
| first_indexed | 2024-03-11T03:26:31Z |
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| last_indexed | 2024-03-11T03:26:31Z |
| publishDate | 2023-05-01 |
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| series | Nanomaterials |
| spelling | doaj.art-7d7148dcd8a343b39838b0de24a171a12023-11-18T02:42:42ZengMDPI AGNanomaterials2079-49912023-05-011310164710.3390/nano13101647Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane CombustionMihaela Filip0Elena Maria Anghel1Vasile Rednic2Florica Papa3Simona Somacescu4Cornel Munteanu5Nicolae Aldea6Jing Zhang7Viorica Parvulescu8Ilie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, RomaniaIlie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, RomaniaNational Institute for R&D of Isotopic and Molecular Technologies, Donat St. 67-103, 400293 Cluj-Napoca, RomaniaIlie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, RomaniaIlie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, RomaniaIlie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, RomaniaNational Institute for R&D of Isotopic and Molecular Technologies, Donat St. 67-103, 400293 Cluj-Napoca, RomaniaBeijing Synchrotron Radiation Facilities of Beijing Electron Positron Collider National Laboratory,19B Yuquan Road, Beijing 100049, ChinaIlie Murgulescu Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, RomaniaThe control of catalytic performance using synthesis conditions is one of the main goals of catalytic research. Two series of Pt-Ti/SBA-15 catalysts with different TiO<sub>2</sub> percentages (<i>n</i> = 1, 5, 10, 30 wt.%) were obtained from tetrabutylorthotitanate (TBOT) and peroxotitanate (PT), as titania precursors and Pt impregnation. The obtained catalysts were characterized using X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), N<sub>2</sub> sorption, Raman, X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), hydrogen temperature-programmed reduction (H<sub>2</sub>-TPR) and H<sub>2</sub>-chemisorption measurements. Raman spectroscopy showed framework titanium species in low TiO<sub>2</sub> loading samples. The anatase phase was evidenced for samples with higher titania loading, obtained from TBOT, and a mixture of rutile and anatase for those synthesized by PT. The rutile phase prevails in rich TiO<sub>2</sub> catalysts obtained from PT. Variable concentrations of Pt<sup>0</sup> as a result of the stronger interaction of PtO with anatase and the weaker interaction with rutile were depicted using XPS. TiO<sub>2</sub> loading and precursors influenced the concentration of Pt species, while the effect on Pt nanoparticles’ size and uniform distribution on support was insignificant. The Pt/PtO ratio and their concentration on the surface were the result of strong metal–support interaction, and this influenced catalytic performance in the complete oxidation of methane at a low temperature. The highest conversion was obtained for sample prepared from PT with 30% TiO<sub>2</sub>.https://www.mdpi.com/2079-4991/13/10/1647mesoporous catalystsPt/Ti-SBA-15peroxotitanatetetrabutylorthotitanatetitania loadingmetal-support interaction |
| spellingShingle | Mihaela Filip Elena Maria Anghel Vasile Rednic Florica Papa Simona Somacescu Cornel Munteanu Nicolae Aldea Jing Zhang Viorica Parvulescu Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane Combustion Nanomaterials mesoporous catalysts Pt/Ti-SBA-15 peroxotitanate tetrabutylorthotitanate titania loading metal-support interaction |
| title | Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane Combustion |
| title_full | Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane Combustion |
| title_fullStr | Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane Combustion |
| title_full_unstemmed | Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane Combustion |
| title_short | Variation in Metal–Support Interaction with TiO<sub>2</sub> Loading and Synthesis Conditions for Pt-Ti/SBA-15 Active Catalysts in Methane Combustion |
| title_sort | variation in metal support interaction with tio sub 2 sub loading and synthesis conditions for pt ti sba 15 active catalysts in methane combustion |
| topic | mesoporous catalysts Pt/Ti-SBA-15 peroxotitanate tetrabutylorthotitanate titania loading metal-support interaction |
| url | https://www.mdpi.com/2079-4991/13/10/1647 |
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