Journal article
Unravelling the dependence of hydrogen oxidation kinetics on the size of Pt nanoparticles by in operando nanoplasmonic temperature sensing
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.
| Language: | English |
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| Year: | 2015 |
| Pages: | 574-580 |
| ISSN: | 15306992 and 15306984 |
| Types: | Journal article |
| DOI: | 10.1021/nl504042u |
Activation energy Atmospheric pressure Enzyme kinetics Hydrogen Hydrogen oxidation Hydrogen oxidation reaction Indirect nanoplasmonic sensing Kinetics Localized surface plasmon resonance Nanoparticle sizes Nanoparticles Oxidation Particle size Particle size dependence Platinum Reaction kinetics Surface plasmon resonance Temperature measurement Temperature measurement methods Temperature sensing hydrogen oxidation kinetics particle size dependence platinum
