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나노물질 및 화학반응 연구단
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Graphene-Semiconductor Catalytic Nanodiodes for Quantitative Detection of Hot Electrons Induced by a Chemical Reaction

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Title
Graphene-Semiconductor Catalytic Nanodiodes for Quantitative Detection of Hot Electrons Induced by a Chemical Reaction
Author(s)
Hyosun Lee; Ievgen I. Nedrygailov; Young Keun Lee; Changhwan Lee; Choi H.; Choi J.S.; Choi C.-G.; Jeong Young Park
Publication Date
2016-03
Journal
NANO LETTERS, v.16, no.3, pp.1650 - 1656
Publisher
AMER CHEMICAL SOC
Abstract
Direct detection of hot electrons generated by exothermic surface reactions on nanocatalysts is an effective strategy to obtain insight into electronic excitation during chemical reactions. For this purpose, we fabricated a novel catalytic nanodiode based on a Schottky junction between a single layer of graphene and an n-type TiO2 layer that enables the detection of hot electron flows produced by hydrogen oxidation on Pt nanoparticles. By making a comparative analysis of data obtained from measuring the hot electron current (chemicurrent) and turnover frequency, we demonstrate that graphene's unique electronic structure and extraordinary material properties, including its atomically thin nature and ballistic electron transport, allow improved conductivity at the interface between the catalytic Pt nanoparticles and the support. Thereby, graphene-based nanodiodes offer an effective and facile way to approach the study of chemical energy conversion mechanisms in composite catalysts with carbon-based supports. © 2016 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2682
ISSN
1530-6984
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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