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Adsorption and Reactions of NO Molecules on Anionic Gold Clusters in the Size Range below 1 nm: Effects of Clusters’ Global Electronic Properties

Abstract

We systemically studied adsorption and reactions of NO on Aun- (n≤80) using a mini flow tube reactor running at 150K. For Aun- (n≤11), their reactions with NO mainly formed cluster complexes containing various numbers of NO units; for Aun- (n≥12), most active sizes eventually formed specific complexes Aun(NO)3-. The relative rates of the reactions with the first NO were measured. Correlations between these relative rates and the adiabatic detachment energies (ADEs) of Aun- revealed the dominant effect of clusters’ spins and a more complicated electron transfer mechanism than that of reactions with O2. Au20- as well as previously reported Au4,6,8- is an exceptional size, which eventually formed the disproportionate product AunNO2-, and all these four sizes have very low ADEs. The effects of clusters’ global electronic properties on adsorption and reactions of NO on anionic gold are helpful to understand catalytic mechanisms of gold-based catalysts in NO removal reactions.

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Supplementary files

Article information


Submitted
12 Jul 2020
Accepted
09 Oct 2020
First published
12 Oct 2020

Phys. Chem. Chem. Phys., 2020, Accepted Manuscript
Article type
Paper

Adsorption and Reactions of NO Molecules on Anionic Gold Clusters in the Size Range below 1 nm: Effects of Clusters’ Global Electronic Properties

J. Ma, T. Wang, J. Yang, J. Hu and X. Xing, Phys. Chem. Chem. Phys., 2020, Accepted Manuscript , DOI: 10.1039/D0CP03711G

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