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Free electron laser infrared action spectroscopy of nitrous oxide binding to platinum clusters, Ptn(N2O)+.
- Source :
- Physical Chemistry Chemical Physics (PCCP); 9/7/2020, Vol. 22 Issue 33, p18606-18613, 8p
- Publication Year :
- 2020
-
Abstract
- Infrared multiple-photon dissociation spectroscopy has been applied to study Pt<subscript>n</subscript>(N<subscript>2</subscript>O)<superscript>+</superscript> (n = 1–8) clusters which represent entrance-channel complexes on the reactive potential energy surface for nitrous oxide decomposition on platinum. Comparison of spectra recorded in the spectral region 950 cm<superscript>−1</superscript> to 2400 cm<superscript>−1</superscript> with those simulated for energetically low-lying structures from density functional theory shows a clear preference for molecular binding via the terminal N atom, though evidence of O-binding is observed for some cluster sizes. Enhanced reactivity of Pt<subscript>n</subscript><superscript>+</superscript>n ≥ 6 clusters towards N<subscript>2</subscript>O is reflected in the calculated reactive potential energy surfaces and, uniquely in the size range studied, Pt<subscript>6</subscript>(N<subscript>2</subscript>O)<superscript>+</superscript> proved impossible to form in significant number density even with cryogenic cooling of the cluster source. Infrared-driven N<subscript>2</subscript>O decomposition, resulting in the formation of cluster oxides, Pt<subscript>n</subscript>O<superscript>+</superscript>, is observed following vibrational excitation of several Pt<subscript>n</subscript>(N<subscript>2</subscript>O)<superscript>+</superscript> complexes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639076
- Volume :
- 22
- Issue :
- 33
- Database :
- Complementary Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Academic Journal
- Accession number :
- 145432160
- Full Text :
- https://doi.org/10.1039/d0cp02800b