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Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes

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...

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Autores principales: Nedrygailov, Ievgen I., Moon, Song Yi, Park, Jeong Young
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6470139/
https://www.ncbi.nlm.nih.gov/pubmed/30996284
http://dx.doi.org/10.1038/s41598-019-42566-3
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author Nedrygailov, Ievgen I.
Moon, Song Yi
Park, Jeong Young
author_facet Nedrygailov, Ievgen I.
Moon, Song Yi
Park, Jeong Young
author_sort Nedrygailov, Ievgen I.
collection PubMed
description 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.
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spelling pubmed-64701392019-04-23 Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes Nedrygailov, Ievgen I. Moon, Song Yi Park, Jeong Young Sci Rep Article 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. Nature Publishing Group UK 2019-04-17 /pmc/articles/PMC6470139/ /pubmed/30996284 http://dx.doi.org/10.1038/s41598-019-42566-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Nedrygailov, Ievgen I.
Moon, Song Yi
Park, Jeong Young
Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
title Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
title_full Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
title_fullStr Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
title_full_unstemmed Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
title_short Hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
title_sort hot electron-driven electrocatalytic hydrogen evolution reaction on metal–semiconductor nanodiode electrodes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6470139/
https://www.ncbi.nlm.nih.gov/pubmed/30996284
http://dx.doi.org/10.1038/s41598-019-42566-3
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