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Plasmonic Nanospectroscopy of Platinum Catalyst Nanoparticle Sintering in a Mesoporous Alumina Support

Pooya Tabib Zadeh Adibi (Institutionen för fysik, Kemisk fysik (Chalmers) ; Kompetenscentrum katalys (KCK)) ; Torben Pingel (Institutionen för fysik, Eva Olsson Group (Chalmers) ; Kompetenscentrum katalys (KCK)) ; Eva Olsson (Institutionen för fysik, Eva Olsson Group (Chalmers) ; Kompetenscentrum katalys (KCK)) ; Henrik Grönbeck (Institutionen för fysik, Kemisk fysik (Chalmers) ; Kompetenscentrum katalys (KCK)) ; Christoph Langhammer (Institutionen för fysik, Kemisk fysik (Chalmers))
ACS Nano (1936-0851). Vol. 10 (2016), 5, p. 5063-5069.
[Artikel, refereegranskad vetenskaplig]

In situ plasmonic nanospectroscopy has proven useful to bridge the pressure gap in heterogeneous catalysis. The method has, however, so far been used only for idealized two-dimensional systems without the structural complexity of realistic three-dimensional porous oxides, which generally are used as supports for the catalytically active metal nanoparticles. Here, we report a generic method that addresses this structural gap by demonstrating the possibility to use nanoplasmonic sensing to monitor surface processes in a traditional three-dimensional mesoporous alumina matrix, wet-impregnated with Pt nanoparticles. The capability of the experimental platform is illustrated by measuring sintering kinetics of the Pt nanoparticles inside the mesoporous matrix under oxidizing conditions at atmospheric pressure and at temperatures up to 625 °C. The study thus demonstrates in operando plasmonic nanospectroscopy of realistic, commercial catalyst systems.

Nyckelord: catalyst; indirect nanoplasmonic sensing; plasmonic nanospectroscopy; platinum; sintering; washcoat

Denna post skapades 2016-07-06. Senast ändrad 2017-09-12.
CPL Pubid: 239077


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