Size-Activity Relationship of TiO<sub>2</sub>-Supported Pt Nanoparticles in Hydrogenation Reactions
Quantitative assessments of the geometric influence on catalytic activity are crucial for catalyst design and understanding reaction mechanisms. In this study, we synthesized a series of catalysts comprising TiO<sub>2</sub>-supported Pt nanoparticles with varying particle sizes, which we...
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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Inorganics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6740/13/6/186 |
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| Summary: | Quantitative assessments of the geometric influence on catalytic activity are crucial for catalyst design and understanding reaction mechanisms. In this study, we synthesized a series of catalysts comprising TiO<sub>2</sub>-supported Pt nanoparticles with varying particle sizes, which were systematically evaluated in representative hydrogenation reactions. A consistent size–activity relationship is established, wherein overall turnover frequency (TOF) values (TOF<sub>overall</sub>: calculated as moles of reactant converted per mole of Pt per hour) are modeled as functions of the average diameter of the supported Pt particles, yielding slope values consistently near −1 across a variety of common substrates. This finding underscores that catalytic activity predominantly originates from surface sites on the Pt nanoparticles rather than from interfacial, edge, or corner active sites. |
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| ISSN: | 2304-6740 |