Unravelling the Dependence of Hydrogen Oxidation Kinetics on the Size of Pt Nanoparticles by in Operando Nanoplasmonic Temperature Sensing
Journal article, 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.


hydrogen oxidation

Indirect nanoplasmonic sensing


particle size dependence


Kristina Wettergren

Chalmers, Applied Physics, Chemical Physics

Anders Hellman

Chalmers, Applied Physics, Chemical Physics

Competence Centre for Catalysis (KCK)

F. Cavalca

Technical University of Denmark (DTU)

Vladimir Zhdanov

Chalmers, Applied Physics, Chemical Physics

Christoph Langhammer

Chalmers, Applied Physics, Chemical Physics

Nano Letters

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

Vol. 15 1 574-580

Areas of Advance

Nanoscience and Nanotechnology



Materials Science

Subject Categories

Materials Engineering

Physical Chemistry


C3SE (Chalmers Centre for Computational Science and Engineering)



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