Abstract
Bimetallic platinum-tin and platinum-gallium catalysts supported on carbon nanofibers (CNF) were prepared via reductive deposition precipitation and impregnation. Detailed EXAFS, TEM-EDX and XPS studies showed that reductive deposition precipitation resulted in a close contact of tin with platinum. These bimetallic catalysts displayed an improved selectivity for cinnamaldehyde hydrogenation towards the desired cinnamyl alcohol as compared to the monometallic platinum catalyst and a bimetallic catalyst prepared by impregnation in which such a close interaction was absent. The general applicability of reductive deposition precipitation as synthesis technique was demonstrated using tin and gallium as promoters.
| Original language | English |
|---|---|
| Pages (from-to) | 146-154 |
| Number of pages | 9 |
| Journal | Journal of Catalysis |
| Volume | 263 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Apr 2009 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors wish to acknowledge the following people: Ad Mens (XPS and nitrogen physisorption), Prof. Ir. John Geus (TEM-EDX), Cor van der Spek (TEM) and Helen de Waard (ICP-OES). Also Korneel Cats, Maarten van Heek, Robin Jastrzebski and Jeroen Pet are acknowledged for their contribution to this work. The synchrotron stations C at HASYLAB (Hamburg, Germany, EU project no. I-20060150EC) and BM26A at ESRF (Grenoble, France, NWO project no. 26-01-767) are acknowledged for the allocated beamtime. Financial support was provided by EU Nanocat Project 506621.
Keywords
- Carbon nanofibers
- EXAFS
- Platinum
- Reductive deposition precipitation
- Selective hydrogenation
- Surface redox reaction