Plasmonic Nanospectroscopy of Platinum Catalyst Nanoparticle Sintering in a Mesoporous Alumina Support
Artikel i vetenskaplig tidskrift, 2016

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.

washcoat

platinum

catalyst

indirect nanoplasmonic sensing

plasmonic nanospectroscopy

sintering

Författare

Pooya Tabib Zadeh Adibi

Chalmers, Fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Torben Pingel

Chalmers, Fysik, Eva Olsson Group

Kompetenscentrum katalys (KCK)

Eva Olsson

Kompetenscentrum katalys (KCK)

Chalmers, Fysik, Eva Olsson Group

Henrik Grönbeck

Chalmers, Fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Christoph Langhammer

Chalmers, Fysik, Kemisk fysik

ACS Nano

1936-0851 (ISSN) 1936-086X (eISSN)

Vol. 10 5 5063-5069

Ämneskategorier

Fysikalisk kemi

DOI

10.1021/acsnano.5b07861

Mer information

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2018-11-05