Formation of a Liquid Film of AgNO3 on a Silver Surface
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Catalysis Letters
ISSN: 1011-372X
, E-ISSN: 1572-879X
|
| Output data |
Year: 2000,
Volume: 64,
Number: 2-4,
Pages: 113-118
Pages count
: 6
DOI:
10.1023/A:1019015826651
|
| Tags |
NO, NOx, Oxidation, Scanning electron microscopy (SEM), Silver, Surface chemical reaction, X-ray photoelectron spectroscopy (XPS) |
| Authors |
Zemlyanov D.
1
,
Weinberg G.
2
,
Wild U.
2
,
Schlögl R.
2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis
|
| 2 |
Fritz-Haber-Institut der Max-Planck Gesellschaft
|
|
Funding (2)
|
1
|
Alfred Toepfer Stiftung F.V.S.
|
|
|
2
|
Max Planck Society
|
|
The behavior of a AgNO3/Ag2O/Ag “sandwich” upon heating in vacuum was studied by in situ X‐ray photoelectron spectroscopy (XPS) and ex situ scanning electron microscopy (SEM). The AgNO3/Ag2O/Ag “sandwich” was prepared by exposure of a silver foil to a NO : O2 mixture. The upper layer of the “sandwich” consists of AgNO3 crystals of a mean size between 0.1 and 0.4 μm. Heating at 550 K in vacuum results in melting of the AgNO3 crystals. A liquid film of AgNO3, readily wetting the silver, covers the surface. Cooling below the melting point of AgNO3 leads to the agglomeration of silver nitrate to long islands with a size reaching a few tens of micrometers (μm). The possible effects of AgNO3 liquid‐phase formation on surface processes are discussed.