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On the Interaction of Metal Nanoparticles with Supports


Metal nanoparticles supported on surfaces often undergo sintering even at moderate temperatures. The degree of sintering is typically influenced by the surface chemistry indicating that besides the commonly believed Ostwald ripening also other processes associated with metal surface diffusion are responsible for the nanoparticle size growth. In addition to the deterioration in metal dispersion, carbon supports can show chemical instability leading to their partial degradation in the proximity of the nanoparticles both in reducing and oxidizing environments at elevated temperatures. This work reports a study of Pd, Pt and Ni nanoparticles anchored on carbon (activated carbon, graphite and carbon nanotubes) as well as titania (nanoparticles and microparticles) surfaces frequently applied as catalyst materials in heterogeneous catalysis and photocatalysis, and evaluate the potential events causing metal sintering and degradation of the supports using transmission electron microscopy analysis.

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A. -R. Rautio is grateful for the post-graduate position and for the personal Grants received from Graduate School in Electronics, Telecommunications and Automation (GETA), Emil Aaltonen and Tauno Tönning foundations. This work is also associated with the activities of the Åbo Akademi Process Chemistry Centre. Academy of Finland (project Hyna), the National Agency for Research and Innovation (TEKES), Kempe Foundations and the Bio4Energy program are acknowledged for funding.

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Correspondence to Krisztian Kordas.

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Kordas, K., Rautio, AR., Lorite, G.S. et al. On the Interaction of Metal Nanoparticles with Supports. Top Catal 58, 1127–1135 (2015).

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  • Carbon nanotubes
  • Titania nanoparticles
  • Catalyst support
  • Catalyst aging
  • Catalyst coarsening