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Isotope Effect of Hot Electrons Generated on Pt Nanoparticle Surfaces Under H2 and D2 Oxidation

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Title
Isotope Effect of Hot Electrons Generated on Pt Nanoparticle Surfaces Under H2 and D2 Oxidation
Author(s)
Hyosun Lee; Nedrygailov I.I.; Si Woo Lee; Jeong Young Park
Publication Date
2018-06
Journal
TOPICS IN CATALYSIS, v.61, no.9-11, pp.915 - 922
Publisher
SPRINGER/PLENUM PUBLISHERS
Abstract
Hot electrons are generated when an exothermic chemical reaction takes place on the surface of a metal catalyst. Detection of these electrons using a catalytic nanodiode based on a metal-semiconductor Schottky junction can shed light on the mechanisms for energy transfer between the reacting molecules and the catalyst. Here, we present a study on the isotope effect of hot electron generation during the catalytic water formation reaction on platinum nanoparticles. To elucidate the isotope effect of hot electrons and to distinguish the reaction steps responsible for the creation of hot electrons, we carried out H2 and D2 oxidation reactions. We also considered the dependence of hot electron flux across the nanodiode on the temperature and geometry of the catalyst. Based on these results, we conclude that the observed effect of hot electron creation is mainly associated with energy released during the surface reaction of adsorbed hydrogen atoms and hydroxyl radicals, i.e. (Formula presented.) at high gas pressure. © 2018 Springer Science+Business Media, LLC, part of Springer Natur
URI
https://pr.ibs.re.kr/handle/8788114/4523
ISSN
1022-5528
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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