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김선미
나노물질 및 화학반응 연구단
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Hot Carrier-Driven Catalytic Reactions on Pt-CdSe-Pt Nanodumbbells and Pt/GaN under Light Irradiation

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Title
Hot Carrier-Driven Catalytic Reactions on Pt-CdSe-Pt Nanodumbbells and Pt/GaN under Light Irradiation
Author(s)
Sun Mi Kim; Seon Joo Lee; Seung Hyun Kim; Sangku Kwon; Ki Ju Yee; Hyunjoon Song; Gabor A. Somorjai; Jeong Young Park
Publication Date
2013-03
Journal
NANO LETTERS, v.13, no.3, pp.1352 - 1358
Publisher
AMER CHEMICAL SOC
Abstract
Hybrid nanocatalysts consisting of metal nanoparticle−semiconductor junctions offer an interesting platform to study the role of metal−oxide interfaces and hot electron flows in heterogeneous catalysis. Here, we report that hot carriers generated upon photon absorption significantly impact the catalytic activity of CO oxidation. We found that Pt−CdSe−Pt nanodumbbells exhibit a higher turnover frequency by a factor of 2 during irradiation by light with energy higher than the bandgap of CdSe, while the turnover rate on bare Pt nanoparticles did not depend on light irradiation. We found that Pt nanoparticles deposited on a GaN substrate under light irradiation exhibit changes in catalytic activity of CO oxidation that depends on the type of doping of the GaN. We suppose that hot electrons are generated upon the absorption of photons by the semiconducting nanorods or substrates, whereafter the hot electrons are injected into the Pt nanoparticles, resulting in the change in catalytic activity. The results imply that hot carrier flows generated during light irradiation significantly influence the catalytic activity of CO oxidation, leading to potential applications as a hot electron-based catalytic actuator
URI
https://pr.ibs.re.kr/handle/8788114/1375
ISSN
1530-6984
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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