Facile NOx interconversion over preoxidized Ag(111)
Artikel i vetenskaplig tidskrift, 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

Författare

Simon Klacar

Kompetenscentrum katalys (KCK)

Chalmers, Teknisk fysik, Kemisk fysik

N. M. Martin

Lunds universitet

J. Gustafson

Lunds universitet

S. Blomberg

Lunds universitet

Z. Liu

Lawrence Berkeley National Laboratory

S. Axnanda

Lawrence Berkeley National Laboratory

R. Chang

Lawrence Berkeley National Laboratory

E. Lundgren

Lunds universitet

Henrik Grönbeck

Kompetenscentrum katalys (KCK)

Chalmers, Teknisk fysik, Kemisk fysik

Surface Science

0039-6028 (ISSN)

Vol. 617 167-174

Ämneskategorier

Fysikalisk kemi

DOI

10.1016/j.susc.2013.07.004

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2018-03-02