Volume 214, 2019

Enhanced hot electron generation by inverse metal–oxide interfaces on catalytic nanodiode

Abstract

Identifying the electronic behavior of metal–oxide interfaces is essential for understanding the origin of catalytic properties and for engineering catalyst structures with the desired reactivity. For a mechanistic understanding of hot electron dynamics at inverse oxide/metal interfaces, we employed a new catalytic nanodiode by combining Co3O4 nanocubes (NCs) with a Pt/TiO2 nanodiode that exhibits nanoscale metal–oxide interfaces. We show that the chemicurrent, which is well correlated with the catalytic activity, is enhanced at the inverse oxide/metal (CoO/Pt) interfaces during H2 oxidation. Based on quantitative visualization of the electronic transfer efficiency with chemicurrent yield, we show that electronic perturbation of oxide/metal interfacial sites not only promotes the generation of hot electrons, but improves catalytic activity.

Graphical abstract: Enhanced hot electron generation by inverse metal–oxide interfaces on catalytic nanodiode

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
27 sept. 2018
Accepted
07 nov. 2018
First published
07 nov. 2018

Faraday Discuss., 2019,214, 353-364

Enhanced hot electron generation by inverse metal–oxide interfaces on catalytic nanodiode

H. Lee, S. Yoon, J. Jo, B. Jeon, T. Hyeon, K. An and J. Y. Park, Faraday Discuss., 2019, 214, 353 DOI: 10.1039/C8FD00136G

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