Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Jens Klein"'
Publikováno v:
Physical Chemistry Chemical Physics. 22:19059-19068
Hydrogen production from electrocatalytic water splitting in electrolyzers is a key process to store excess electric energy produced from intermittent renewable energy sources. For proton exchange membrane (PEM) electrolyzers, carbon supported platin
Publikováno v:
Electrochimica Acta. 311:244-254
Ru-core Pt-shell nanoparticles show an enhanced electrocatalytic activity for the methanol oxidation reaction (MOR) compared to the respective monometallic or most bimetallic alloy systems. Due to their ill-defined structure, however, a simple interp
Publikováno v:
Electrochimica Acta. 306:516-528
The enhanced activity of various bimetallic catalysts/electrodes in electrocatalytic reactions is usually ascribed to a bifunctional mechanism. This seems to neglect other effects arising from electronic modifications and further geometric effects, w
Publikováno v:
Surface Science. 631:248-257
Structural modifications during electrochemical measurements on well defined Pt modified Ru(0001) electrode surfaces, which were prepared and characterized under ultrahigh vacuum (UHV) conditions, and the influence of the restructuring on the CO oxid
Autor:
Albert K. Engstfeld, Jens Klein, Rolf Jürgen Behm, Johannes Schnaidt, Sylvain Brimaud, Stephan Beckord
Publikováno v:
Physical chemistry chemical physics : PCCP. 19(6)
We describe the construction and discuss the performance of a novel combined ultrahigh vacuum (UHV)-electrochemistry set-up, allowing the controlled preparation and structural characterization of complex nanostructured electrode surfaces by high reso
Publikováno v:
ChemPhysChem. 14:162-169
Investigating the dynamics in an adlayer of the oligopyridine derivative 2-phenyl-4,6-bis(6-(pyridine-2-yl)-4-(pyridine-4-yl)pyridine-2-yl)pyrimidine (2,4'-BTP) on Ag(111) by fast scanning tunneling microscopy (video-STM), we found that rotating 2,4'
Publikováno v:
tm - Technisches Messen. 74:413-421
Für die Dichtwirkung von Axialturbinen-Deckbandgeometrien wird die Einrichtung eines Versuchsstands beschrieben, um Strömungsfelder nach der Reynolds-Analogie in einer Beschaufelung, bestehend aus der Folge von Leit-, Lauf- und Leitreihe, zu unters
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 40:S345-S358
We report on rapid adiabatic passage (RAP) in a Pr3+:Y2SiO5 crystal, cooled to cryogenic temperatures. The medium is prepared by optical pumping and spectral hole burning, creating a spectrally isolated two-level system within the inhomogeneous bandw
Publikováno v:
Optics Communications. 264:463-470
We demonstrate significant enhancement of four-wave mixing in coherently driven mercury isotopes to generate vacuum-ultraviolet radiation at 125 nm. The enhancement is accomplished by preparation of the mercury atoms in a state of maximum coherence,
Publikováno v:
Physical Review A. 78
We report on experimental investigations of stimulated Raman adiabatic passage (STIRAP) in a ${\mathrm{Pr}}^{3+}:{\mathrm{Y}}_{2}\mathrm{Si}{\mathrm{O}}_{5}$ crystal. STIRAP drives complete, coherent population transfer between two hyperfine levels i