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RU-F: “In-situ spectroscopy of catalyst interfaces” (tbd)

The second research unit supported by the HZB Berlin focuses on the fundamentals of structure formation of interfaces with relevance for electrocatalytic applications. The research unit will address synthesis aspects of model catalysts, photoabsorber and eventually also combinations of these material classes, which will be realized in close collaboration with the Solar Fuels institute at the HZB (van de Kroel). Moreover a central point will be the chemical and physical characterization of those interfaces. This approach effectively complements the activities of the research units at the HI ERN in Erlangen, particularly of Electrocatalysis and Processing of catalyst layers, while creating a bridge to the activities at the EMIL beamline at Bessy and thus the work on in-situ X-ray spectroscopy. A strong interaction with the electrocatalysis research unit is envisaged on the common utilization of advanced electrochemical characterization techniques, which enable insights into selectivity of reactions and the photo-electrochemical stability of materials. Moreover, together with the X-ray spectroscopy unit at HZB the research unit is supposed to act as an Anchor group for other departments at the FAU that have interest in using large scale research facilities of the Helmholtz Society, of course particularly Bessy in this case.

Scheme: Schlögl et al.; Angew. Chem. Int. Ed., (2013) 52, 11660 – 11664.

In-situ XPSScheme: a) A cell with a liquid reservoir developed at the FHI-MPG in Berlin for in-situ investigations. Due to the pressure difference the water in the liquid reservoir diffuses through the membrane and generates water pressure in the XPS chamber in the range of mbar. The porosity of the Pt film enables water transport. b) Deconvoluted Pt4f XP spectra: red (Pt1), blue (Pt2), and green (Pt3) components for the spectrum during OER at 2V and corresponding components at 2.5V (dashed lines and gray shading) recorded with the in-situ cell. Reproduced from Schlögl et al; Angew. Chem. Int. Ed. 2013, 52,11660-11664.Scheme: a) A cell with a liquid reservoir developed at the FHI-MPG in Berlin for in-situ investigations. Due to the pressure difference the water in the liquid reservoir diffuses through the membrane and generates water pressure in the XPS chamber in the range of mbar. The porosity of the Pt film enables water transport. b) Deconvoluted Pt4f XP spectra: red (Pt1), blue (Pt2), and green (Pt3) components for the spectrum during OER at 2V and corresponding components at 2.5V (dashed lines and gray shading) recorded with the in-situ cell. Reproduced from Schlögl et al; Angew. Chem. Int. Ed. 2013, 52,11660-11664, after permission from John Wiley & Sons.

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