Uta Hejral

TL;DR: An x-ray-diffraction–based characterization method is demonstrated that uses high-energy photons (85 kiloelectron volts) to provide unexpected gains in data acquisition speed by several orders of magnitude and enables structural determinations of surfaces on time scales suitable for in situ studies.

TL;DR: In this paper, the authors compared the CO2RR selectivity of Cu catalysts subjected to either potentiostatic conditions (fixed applied potential of -0.7 VRHE) or pulsed electrolysis conditions (1 s pulses at oxidative potentials ranging from Ean = 0.6 to 1.5 VRHE).

TL;DR: In this paper , a pulsed reaction protocol consisting of alternating working and oxidizing potential periods that dynamically perturb catalysts derived from Cu 2 O nanocubes was used to decouple the effect of the ensemble of coexisting copper species on the product distribution.

TL;DR: In this article, the structural and chemical state characterization of Rh/CeO2 and Ni/CEO2 catalysts during atmospheric pressure CO2 methanation has been performed by a combined array of time-resolved analytical techniques including ambient-pressure X-ray photoelectron spectroscopy, high-energy Xray diffraction and diffuse reflectance infrared Fourier transform spectroscopic analysis.

TL;DR: This work reports on the composition-dependent three-dimensional restructuring of epitaxial platinum–rhodium alloy nanoparticles on alumina during carbon monoxide oxidation at 550 K and near-atmospheric pressures employing in situ high-energy grazing incidence x-ray diffraction, online mass spectrometry and a combinatorial sample design.