Unravelling the Dependence of Hydrogen Oxidation Kinetics on the Size of Pt Nanoparticles by in Operando Nanoplasmonic Temperature Sensing
Artikel i vetenskaplig tidskrift, 2015

We use a noninvasive nanoscale optical-temperature measurement method based on localized surface plasmon resonance to investigate the particle size-dependence of the hydrogen oxidation reaction kinetics on model supported Pt nanocatalysts at atmospheric pressure in operando. With decreasing average nanoparticle size from 11 down to 3 nm, the apparent reaction activation energy is found to increase from 0.5 up to 0.8 eV. This effect is attributed to an increase of the fraction of (100)-facet and edge and corner sites and their increasingly important role in the reaction with decreasing particle size.

kinetics

hydrogen oxidation

Indirect nanoplasmonic sensing

platinum

particle size dependence

Författare

Kristina Wettergren

Chalmers, Teknisk fysik, Kemisk fysik

Anders Hellman

Chalmers, Teknisk fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

F. Cavalca

Danmarks Tekniske Universitet (DTU)

Vladimir Zhdanov

Chalmers, Teknisk fysik, Kemisk fysik

Christoph Langhammer

Chalmers, Teknisk fysik, Kemisk fysik

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 15 574-580

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Energi

Materialvetenskap

Ämneskategorier

Materialteknik

Fysikalisk kemi

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1021/nl504042u