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

Hyosun Lee, Sinmyung Yoon, Jinwoung Jo, Beomjoon Jeon, Taeghwan Hyeon, Kwangjin An, Jeong Young Park

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


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.

Original languageEnglish
Pages (from-to)353-364
Number of pages12
JournalFaraday Discussions
StatePublished - 2019


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