Facile NOx interconversion over preoxidized Ag(111)
Journal article, 2013

X-ray photoelectron spectroscopy and density functional theory calculations are used to investigate NO adsorption at low (100 K) and room temperature (RT) over preoxidized Ag(111). At 100 K, the data indicates presence of NO and N2O2, with little or no nitrite/nitrate formation. This is consistent with the calculated surface core level shifts and the pronounced barrier for nitrite formation. At RT, the recorded spectra indicate a complex interconversion between adsorbed species with an initial formation of a p(4 x 4) nitrate overlayer. With increasing NO pressure, the experimental results are best rationalized by partial nitrate decomposition into nitrites and subsequent NO physisorption, which leads to the formation of N2O3-like species.

Nitrogen oxides

Density functional theory

Ag

Silver

Photoemission spectroscopy

Author

Simon Klacar

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics, Chemical Physics

N. M. Martin

Lund University

J. Gustafson

Lund University

S. Blomberg

Lund University

Z. Liu

Lawrence Berkeley National Laboratory

S. Axnanda

Lawrence Berkeley National Laboratory

R. Chang

Lawrence Berkeley National Laboratory

E. Lundgren

Lund University

Henrik Grönbeck

Competence Centre for Catalysis (KCK)

Chalmers, Applied Physics, Chemical Physics

Surface Science

0039-6028 (ISSN)

Vol. 617 167-174

Subject Categories

Physical Chemistry

DOI

10.1016/j.susc.2013.07.004

More information

Latest update

3/2/2018 9