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Type: 
Journal
Description: 
The adsorption of alkalis (Na, K) on Ni(1 1 1) and their coadsorption with CO and O were studied by high-resolution electron energy loss spectroscopy. Loss measurements of clean alkali adlayers provided the expected behaviour of the alkali-substrate vibration energy as a function of the alkali coverage. This result was achieved by eliminating any trace of CO contamination from the alkali adlayer. As a matter of fact, a significant softening of the alkali–Ni vibration energy was revealed in the alkali + CO coadsorbed phase. Moreover, alkali coadsorption with oxygen caused a weakening of the ONi bond and a strengthening of the alkaliNi bond.
Publisher: 
North-Holland
Publication date: 
30 Aug 2008
Authors: 

A Politano, V Formoso, G Chiarello

Biblio References: 
Volume: 254 Issue: 21 Pages: 6854-6859
Origin: 
Applied surface science