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|Title:||ALS Special Seminar | Andrey Shavorskiy|
|When:||09/ 6/2013 1:00 PM - 2:00 PM|
|Description:||ALS Special Seminar|
Friday, September 6, 2013
6-2202 Conf Rm
1 - 2 pm
ALS, Berkeley Lab
Ambient Pressure Photoemission Spectroscopy for Studies of Surfaces and Interfaces Under Realistic Conditions
Solid-vapor, solid-liquid, and liquid-vapor interfaces are ubiquitous in nature and industrial applications. Examples are heterogeneous catalysts, atmospheric particles, batteries, fuel cell electrodes, electrochemical double layer, rain droplets, and many others. The investigation of the chemical processes at these interfaces on the molecular scale is of paramount importance for, among other topics, rational design of new catalysts, development new strategies for carbon capture, hydrogen storage, direct solar-to-fuel conversion, and to understanding the fate of battery electrodes or aerosol particles in the atmosphere.
Ambient Pressure Photoemission Spectroscopy (APPES) is one of the most widely used analytical techniques today for probing the composition and electronic structure of such interfaces. Its high surface sensitivity, direct chemical information, and ability to perform at ambient conditions makes it an ideal tool for these tasks. We present a number of case studies completed at the beamlines 11.0.2 and 9.3.2 of the Advanced Light Source showing an ability of APPES to study chemical composition of systems in-situ / in-operando conditions. In particular we will discuss our recent development of a new apparatus allowing APPES experiments on electrochemical systems, metallic membranes, and also on heterogeneous interfaces with high spatial and/or temporal resolution.
|Location:||6-2202 Conf Rm|