Partenaires

Logo CNRS Logo UPMC


 
 
 

Rechercher

Sur ce site

Sur le Web du CNRS

 
 
 



Accueil du site > Productions scientifiques > Séminaires à PHENIX > 2014 > Séminaire 17.11.2014 à 10h30

Séminaire 17.11.2014 à 10h30

par Benjamin Rotenberg - 31 octobre 2014

Héloïse Tissot présentera ses travaux de thèse (UPMC - SOLEIL) le lundi 17 novembre 2014 à 10h30 dans la bibliothèque du laboratoire PHENIX (7e étage, bâtiment F, porte 754) intitulé :

Heterogeneous chemistry at liquid/solid and liquid/vapor interfaces under environmental conditions investigated by Near-Ambient Pressure XPS.

Résumé

The interaction of liquid water with gases or surfaces plays a major role in many processes of heterogeneous catalysis, electrochemistry, and environmental chemistry. Near Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS) is an excellent method for the investigation of the interfacial chemistry. In newly developed NAP-XPS setups, the work pressure in the analysis chamber is raised up to 20 mbar. In those conditions, not only solid/gas interfaces are investigable by NAP-XPS, but also liquid water/solid and vapor/ liquid interfaces.

I will present two illustrative examples relevant to environmental molecular chemistry. First, I will demonstrate that core-level XPS can monitor the hydration process of the interlayer counterions of swelling clays. Second, I will show how XPS reveals the ion segregation at the vapor/ liquid water interface of sodium halide solutions.

Télécharger l’annonce