Adsorption Kinetics of Nitrogen Molecules on Size-Selected Silver Cluster Cations

Tomonori Ito, Masashi Arakawa, Yuki Taniguchi, Akira Terasaki

Research output: Contribution to journalArticle

Abstract

We present adsorption processes of dinitrogen on size-selected silver cluster cations, Agn+ (n = 1-10), studied by kinetics measurement using an ion trap. The cluster ions showed sequential adsorption of N2 molecules when the ion trap was cooled down to 105 K, excluding n = 8 and 9 that were exceptionally inactive at this temperature. Termolecular rate coefficients of each adsorption step are determined by analyzing time-dependent changes in the reactant and product ion signals. The first-step rate coefficients were found to increase exponentially from n = 1 to 7 due to increased internal degrees of freedom at larger sizes, which are favorable for accommodating the adsorption energy in a free cluster. In contrast, the adsorption rate turned to decrease for n > 7 due to weaker binding of dinitrogen as revealed by density-functional-theory (DFT) calculation. Adsorption sites on Agn+ are further discussed on the basis of the maximum number of adsorbing N2 molecules observed in the experiment.

Original languageEnglish
Pages (from-to)759-770
Number of pages12
JournalZeitschrift fur Physikalische Chemie
Volume233
Issue number6
DOIs
Publication statusPublished - Jun 26 2019

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Silver
Cations
Nitrogen
silver
Adsorption
nitrogen
cations
Molecules
Kinetics
adsorption
kinetics
Ions
molecules
coefficients
Density functional theory
ions
degrees of freedom
density functional theory
products
Experiments

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Cite this

Adsorption Kinetics of Nitrogen Molecules on Size-Selected Silver Cluster Cations. / Ito, Tomonori; Arakawa, Masashi; Taniguchi, Yuki; Terasaki, Akira.

In: Zeitschrift fur Physikalische Chemie, Vol. 233, No. 6, 26.06.2019, p. 759-770.

Research output: Contribution to journalArticle

Ito, Tomonori ; Arakawa, Masashi ; Taniguchi, Yuki ; Terasaki, Akira. / Adsorption Kinetics of Nitrogen Molecules on Size-Selected Silver Cluster Cations. In: Zeitschrift fur Physikalische Chemie. 2019 ; Vol. 233, No. 6. pp. 759-770.
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