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.
kinetics
hydrogen oxidation
Indirect nanoplasmonic sensing
platinum
particle size dependence
Author
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 1 574-580Areas of Advance
Nanoscience and Nanotechnology
Transport
Energy
Materials Science
Subject Categories
Materials Engineering
Physical Chemistry
Infrastructure
C3SE (Chalmers Centre for Computational Science and Engineering)
DOI
10.1021/nl504042u