Templated Growth of Pd Nanoparticles Using Sputtering Deposition Process and Its Catalytic Activities
| Autor: | Pedro Migowski, Adriano F. Feil, Sérgio R. Teixeira, Dario Eberhardt |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Nanostructure 010405 organic chemistry Biomedical Engineering Cyclohexene Bioengineering General Chemistry Sputter deposition 010402 general chemistry Condensed Matter Physics 01 natural sciences Homogeneous distribution 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Chemical engineering Scientific method Pd nanoparticles General Materials Science Mesoporous material |
| Zdroj: | Journal of nanoscience and nanotechnology. 18(3) |
| ISSN: | 1533-4880 |
| Popis: | A simple method based on sputtering deposition of Pd onto mesoporous SiO2 (SBA-15) was employed to produce supported Pd nanoparticles (NPs) that can be used as hydrogenation catalysts. The use of sputtering deposition eliminates contaminants and avoids additional drawbacks of traditional chemical methods applied to prepare heterogeneous supported metal catalysts. A mechanical resonant stirrer was used to revolve the SBA-15 powder and ensure homogeneous distribution of the Pd NPs over the support. The SBA-15 pores act as templates for Pd NPs and drive nanostructure growth. Consequently, the NPs obtained have the same diameter as that of the SBA-15 channels (~5 nm) and elongated particles are formed as sputtering deposition increases. The SBA-15 supported Pd NPs (Pd NPs/SBA-15) were tested in a probe hydrogenation of cyclohexene reaction to evaluate the catalytic activity of the Pd NPs. Turnover frequency (TOF) of 2000 min-1 were achieved with the lower Pd NPs concentration (0.15 wt%) catalyst. |
| Databáze: | OpenAIRE |
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