Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts
To obtain selective hydrogenation catalysts with low noble metal content, two carbon-supported Mo-Pt bimetallic catalysts have been synthesized from two different molybdenum precursors, i.e., Na<sub>2</sub>MoO<sub>4</sub> and (NH<sub>4</sub>)<sub>6</sub&g...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-02-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/11/2/362 |
| _version_ | 1797416903013040128 |
|---|---|
| author | Marta Stucchi Maela Manzoli Filippo Bossola Alberto Villa Laura Prati |
| author_facet | Marta Stucchi Maela Manzoli Filippo Bossola Alberto Villa Laura Prati |
| author_sort | Marta Stucchi |
| collection | DOAJ |
| description | To obtain selective hydrogenation catalysts with low noble metal content, two carbon-supported Mo-Pt bimetallic catalysts have been synthesized from two different molybdenum precursors, i.e., Na<sub>2</sub>MoO<sub>4</sub> and (NH<sub>4</sub>)<sub>6</sub>Mo<sub>7</sub>O<sub>24</sub>. The results obtained by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) combined with the presence and strength of acid sites clarified the different catalytic behavior toward cinnamaldehyde hydrogenation. After impregnating the carbon support with Mo precursors, each sample was used either as is or treated at 400 °C in N<sub>2</sub> flow, as support for Pt nanoparticles (NPs). The heating treatment before Pt deposition had a positive effect on the catalytic performance. Indeed, TEM analyses showed very homogeneously dispersed Pt NPs only when they were deposited on the heat-treated Mo/C supports, and XPS analyses revealed an increase in both the exposure and reduction of Pt, which was probably tuned by different MoO<sub>3</sub>/MoO<sub>2</sub> ratios. Moreover, the different acid properties of the catalysts resulted in different selectivity. |
| first_indexed | 2024-03-09T06:12:07Z |
| format | Article |
| id | doaj.art-ef4c7055b59d40ef9df5c065526b03c1 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T06:12:07Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-ef4c7055b59d40ef9df5c065526b03c12023-12-03T11:58:26ZengMDPI AGNanomaterials2079-49912021-02-0111236210.3390/nano11020362Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo CatalystsMarta Stucchi0Maela Manzoli1Filippo Bossola2Alberto Villa3Laura Prati4Chemistry Department, University of Milano, Via C. Golgi 19, 20133 Milano, ItalyDepartment of Drug Science and Technology and NIS Centre for Nanostructured Interfaces and Surfaces, University of Turin, Via P. Giuria 9, 10125 Torino, ItalyIstituto di scienze e tecnologie chimiche “Giulio Natta” (SCITEC) CNR, Via C. Golgi 19, 20133 Milano, ItalyChemistry Department, University of Milano, Via C. Golgi 19, 20133 Milano, ItalyChemistry Department, University of Milano, Via C. Golgi 19, 20133 Milano, ItalyTo obtain selective hydrogenation catalysts with low noble metal content, two carbon-supported Mo-Pt bimetallic catalysts have been synthesized from two different molybdenum precursors, i.e., Na<sub>2</sub>MoO<sub>4</sub> and (NH<sub>4</sub>)<sub>6</sub>Mo<sub>7</sub>O<sub>24</sub>. The results obtained by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) combined with the presence and strength of acid sites clarified the different catalytic behavior toward cinnamaldehyde hydrogenation. After impregnating the carbon support with Mo precursors, each sample was used either as is or treated at 400 °C in N<sub>2</sub> flow, as support for Pt nanoparticles (NPs). The heating treatment before Pt deposition had a positive effect on the catalytic performance. Indeed, TEM analyses showed very homogeneously dispersed Pt NPs only when they were deposited on the heat-treated Mo/C supports, and XPS analyses revealed an increase in both the exposure and reduction of Pt, which was probably tuned by different MoO<sub>3</sub>/MoO<sub>2</sub> ratios. Moreover, the different acid properties of the catalysts resulted in different selectivity.https://www.mdpi.com/2079-4991/11/2/362molybdenumcinnamaldehydecinnamaldehyde hydrogenationcarbon supported Mobimetallic Pt structureselectivity |
| spellingShingle | Marta Stucchi Maela Manzoli Filippo Bossola Alberto Villa Laura Prati Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts Nanomaterials molybdenum cinnamaldehyde cinnamaldehyde hydrogenation carbon supported Mo bimetallic Pt structure selectivity |
| title | Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts |
| title_full | Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts |
| title_fullStr | Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts |
| title_full_unstemmed | Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts |
| title_short | Ruling Factors in Cinnamaldehyde Hydrogenation: Activity and Selectivity of Pt-Mo Catalysts |
| title_sort | ruling factors in cinnamaldehyde hydrogenation activity and selectivity of pt mo catalysts |
| topic | molybdenum cinnamaldehyde cinnamaldehyde hydrogenation carbon supported Mo bimetallic Pt structure selectivity |
| url | https://www.mdpi.com/2079-4991/11/2/362 |
| work_keys_str_mv | AT martastucchi rulingfactorsincinnamaldehydehydrogenationactivityandselectivityofptmocatalysts AT maelamanzoli rulingfactorsincinnamaldehydehydrogenationactivityandselectivityofptmocatalysts AT filippobossola rulingfactorsincinnamaldehydehydrogenationactivityandselectivityofptmocatalysts AT albertovilla rulingfactorsincinnamaldehydehydrogenationactivityandselectivityofptmocatalysts AT lauraprati rulingfactorsincinnamaldehydehydrogenationactivityandselectivityofptmocatalysts |