Heterometal nanoparticles from Ru-based molecular clusters covalently anchored onto functionalized carbon nanotubes and nanofibers
| Autor: | Michel Devillers, Pietro Moggi, Arnaud Delcorte, Gustaaf Van Tendeloo, Claude Poleunis, Xiaoxing Ke, Sophie Hermans, Deborah Vidick |
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| Přispěvatelé: | UCL - SST/IMCN/MOST - Molecules, Solids and Reactivity, UCL - SST/IMCN/BSMA - Bio and soft matter |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
General Physics and Astronomy Nanoparticle Nanotechnology 02 engineering and technology Carbon nanotube Thermal treatment lcsh:Chemical technology 010402 general chemistry lcsh:Technology 01 natural sciences Full Research Paper law.invention Bimetal nanotubes law nanofibers Scanning transmission electron microscopy lcsh:TP1-1185 General Materials Science Electrical and Electronic Engineering lcsh:Science High-resolution transmission electron microscopy cluster lcsh:T Physics 021001 nanoscience & nanotechnology Dark field microscopy lcsh:QC1-999 0104 chemical sciences Nanoscience ammonia synthesis Chemical engineering Nanofiber lcsh:Q nanoparticles 0210 nano-technology Engineering sciences. Technology lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology Beilstein journal of nanotechnology Beilstein Journal of Nanotechnology, Vol. 6, p. 1287-1297 (2015) Beilstein Journal of Nanotechnology, Vol 6, Iss 1, Pp 1287-1297 (2015) |
| ISSN: | 2190-4286 |
| Popis: | Heterometal clusters containing Ru and Au, Co and/or Pt are anchored onto carbon nanotubes and nanofibers functionalized with chelating phosphine groups. The cluster anchoring yield is related to the amount of phosphine groups available on the nanocarbon surface. The ligands of the anchored molecular species are then removed by gentle thermal treatment in order to form nanoparticles. In the case of Au-containing clusters, removal of gold atoms from the clusters and agglomeration leads to a bimodal distribution of nanoparticles at the nanocarbon surface. In the case of Ru–Pt species, anchoring occurs without reorganization through a ligand exchange mechanism. After thermal treatment, ultrasmall (1–3 nm) bimetal Ru–Pt nanoparticles are formed on the surface of the nanocarbons. Characterization by high resolution transmission electron microscopy (HRTEM) and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) confirms their bimetal nature on the nanoscale. The obtained bimetal nanoparticles supported on nanocarbon were tested as catalysts in ammonia synthesis and are shown to be active at low temperature and atmospheric pressure with very low Ru loading. |
| Databáze: | OpenAIRE |
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