NO dimer and dinitrosyl formation on Pd(111): from ultra-high-vacuum to elevated pressure conditions

Journal of the American Chemical Society
Christian HessD Wayne Goodman

Abstract

Using in situ polarization modulation infrared reflection absorption spectroscopy (PM-IRAS) and conventional IRAS techniques, the adsorption of NO on Pd(111) was studied from ultra-high-vacuum (UHV) conditions to 400 mbar. New monomeric and non-monomeric high-coverage NO adsorption states were observed at 400 mbar. Initial NO adsorption at 600 K and subsequent cooling in the presence of 400 mbar NO lead to a new high-coverage monomeric adsorption state. For NO adsorption at room temperature, the formation of NO dimer as well as dinitrosyl states was observed, which upon heating transformed into the high-coverage monomeric adsorption state. In contrast, under UHV conditions, NO dimers were stable only at low temperatures up to 60 K, above which they transformed into a monomeric NO adsorption state with a (2x2)-3NO structure. Our results demonstrate that stable NO dimeric and dinitrosyl species can be formed on Pd(111) at elevated pressure conditions, emphasizing their potential role in catalysis.

References

Feb 15, 2001·Physical Review Letters·L OsterlundF Besenbacher
Jul 30, 2002·Physical Review Letters·B L M Hendriksen, J W M Frenken
Jan 8, 2004·Journal of the American Chemical Society·Chinta SivadinarayanaDavid W Goodman
Jul 21, 2006·The Journal of Physical Chemistry. B·Ronnie T VangFlemming Besenbacher

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Citations

May 9, 2012·Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life·Soujanya SingireddyDaniel R Strongin
Aug 21, 2013·Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life·Alexander D GordonDaniel R Strongin
Dec 16, 2011·The Journal of Chemical Physics·Natalia García Rey, Heike Arnolds
Jun 9, 2014·The Journal of Chemical Physics·A ShiotariJ Yoshinobu
Jan 8, 2020·Nanomaterials·Abulkosim NasriddinovAlexander Gaskov
May 15, 2009·Chemical Reviews·Victor RoscaMarc T M Koper
May 1, 2015·Inorganic Chemistry·Ashley M Wright, Trevor W Hayton

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