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Unravelling the Dependence of Hydrogen Oxidation Kinetics on the Size of Pt Nanoparticles by in Operando Nanoplasmonic Temperature Sensing
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- Wettergren, Kristina, 1974 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Hellman, Anders, 1974 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Cavalca, F. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- (creator_code:org_t)
- 2014-12-11
- 2015
- English.
- In: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 15:1, s. 574-580
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- kinetics
- hydrogen oxidation
- Indirect nanoplasmonic sensing
- platinum
- particle size dependence
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- art (subject category)
- ref (subject category)
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