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Nanodiode-based hot electrons: Influence on surface chemistry and catalytic reactions

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Title
Nanodiode-based hot electrons: Influence on surface chemistry and catalytic reactions
Author(s)
Jeong Young Park; Gabor A. Somorjai
Publication Date
2020-01
Journal
MRS BULLETIN, v.45, no.1, pp.26 - 31
Publisher
CAMBRIDGE UNIV PRESS
Abstract
Understanding fundamental mechanisms for surface electronic excitation is of great importance in surface chemistry. Charge transport through metal-oxide interfaces plays a significant role in heterogeneous catalysis. Over the last several decades, a number of experimental and theoretical results suggest that this charge flow through metal-support interfaces leads to catalytic enhancement often observed in mixed catalysts. Direct measurement of charge flow on actual catalysts is a rather challenging task because it requires the use of an electronic circuit. This approach has been enabled by a catalytic nanodiode that is mainly composed of a catalytic metal and semiconducting oxides that form a Schottky contact. In this article, we describe the advances in this approach. We show that there is close connection between the phenomena of hot-electron creation and chemical reaction that occur at both gas-solid and liquid-solid interfaces. The intensity of hot-electron flow is well correlated with the turnover rates of corresponding reactions, which opens the possibility for developing new operando methodologies to monitor catalytic reactions as well as a novel scheme for the electronic control of chemical reactions. © 2020 Materials Research Society
URI
https://pr.ibs.re.kr/handle/8788114/7253
ISSN
0883-7694
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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