| AVS 66th International Symposium & Exhibition | |
| Frontiers of New Light Sources Applied to Materials, Interfaces, and Processing Focus Topic | Thursday Sessions |
| Session LS+HC+SS-ThM |
| Session: | Frontiers of Time-resolved Techniques for Energy & Catalysis Highlight Session |
| Presenter: | Slavomir Nemsak, Lawrence Berkeley National Laboratory |
| Authors: | S. Nemsak, Lawrence Berkeley National Laboratory H. Bluhm, Fritz Haber Institute, Germany C.S. Fadley, University of California, Davis |
| Correspondent: | Click to Email |
A great efforts have been made in the development of in-situ and operando experimental methods in the last two decades, with ambient pressure photoelectron spectroscopy being one of the most profound examples [1]. In combination with advanced techniques, such as standing wave excitation, an unprecedented depth resolution across operating interfaces can be obtained, providing valuable information on processes governing interfacial behavior.
With the excellent depth selectivity and sensitivity to chemistry and electrostatic gradients, standing wave ambient pressure photoelectron spectroscopy is exploited to probe two different solid/liquid interfaces relevant to energy research, electrochemistry, and atmospheric and environmental science [2,3]. Liquid layers are prepared either by water adsorption in a saturated vapor ambiance or using a so-called meniscus method, in which the sample is pulled out of a liquid reservoir leaving a thin liquid film on the sample’s surface. The latter experimental configuration allows also for the operando electrochemistry [4]. The outlook and future developments of the technique will be also discussed.
[1] D.E. Starr et al., Chem. Soc. Rev.42, 5833 (2013).
[2] S. Nemšák et al., Nat. Comm.5, 5441 (2014).
[3] O. Karslıoğlu et al., Faraday Discuss.180, 35 (2015).
[4] S. Axnanda et al., Sci. Rep.5, 9788 (2015).