Nanoplasmonic probes of catalytic reactions
Artikel i vetenskaplig tidskrift, 2009

Optical probes of heterogeneous catalytic reactions can be valuable tools for optimization and process control because they can operate under realistic conditions, but often probes lack sensitivity. We have developed a plasmonic sensing method for such reactions based on arrays of nanofabricated gold disks, covered by a thin (∼10 nanometer) coating (catalyst support) on which the catalyst nanoparticles are deposited. The sensing particles monitor changes in surface coverage of reactants during catalytic reaction through peak shifts in the optical extinction spectrum. Sensitivities to below 10 -3 monolayers are estimated. The capacity of the method is demonstrated for three catalytic reactions, CO and H 2 oxidation on Pt, and NO x conversion to N 2 on Pt/BaO.

LSPR

NOx storage

kinetic phase transition

indirect sensing

Catalysis

nanoparticle plasmon

Författare

Elin Maria Kristina Larsson

Chalmers, Teknisk fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Christoph Langhammer

Chalmers, Teknisk fysik, Kemisk fysik

Igor Zoric

Chalmers, Teknisk fysik, Kemisk fysik

Bengt Herbert Kasemo

Chalmers, Teknisk fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Science

0036-8075 (ISSN)

Vol. 326. 5956 1091 - 1094

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1126/science.1176593

Mer information

Skapat

2017-10-07