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Ievgen Nedrygailov
나노물질 및 화학반응 연구단
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Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes

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Title
Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
Author(s)
Ievgen I. Nedrygailov; Song Yi Moon; Jeong Young Park
Publication Date
2019-04
Journal
SCIENTIFIC REPORTS, v.9, no.1, pp.6208 -
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2019, The Author(s). Hot electrons generated on metal catalysts influence atomic and molecular processes, leading to hot electron-driven catalytic reactions. Here, we show the acceleration of electrocatalytic hydrogen evolution caused by internal injection of hot electrons on Pt/Si metal–semiconductor electrodes. When a forward bias voltage is applied to the Pt/Si contact, hot electrons are injected. The excess energy of these electrons allows them to reach the Pt/electrolyte interface and reduce the adsorbed hydrogen ions to form H 2 (2H + + 2e − →H 2 ). We show that the onset potential of the hydrogen evolution reaction shifts positively by 160 mV while the cathodic current exhibits an 8-fold increase in the presence of hot electrons. The effect disappears when the thickness of the Pt film exceeds the mean free path of the hot electrons. The concept of a hot electron-driven reaction can lead to the development of a novel mechanism for controlling reactivity at liquid–solid interfaces
URI
https://pr.ibs.re.kr/handle/8788114/6314
ISSN
2045-2322
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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