Recent progress in laser-based high-repetition rate extreme ultraviolet (EUV) light sources and multidimensional photoelectron spectroscopy enables the build-up of a new generation of time-resolved photoemission experiments. Here, we present a setup for time-resolved momentum microscopy driven by a 1 MHz fs EUV table-top light source optimized for the generation of 26.5 eV photons. The setup provides simultaneous access to the temporal evolution of the photoelectron’s kinetic energy and in-plane momentum. We discuss opportunities and limitations of our new experiment based on a series of static and time-resolved measurements on graphene.

Catalytic systems prepared by controlled processes play an important role in the utilization of CO₂ via catalytic hydrogenation to produce useful C1 chemicals (such as CO, CH₄, and CH₃OH), which will be vital for forthcoming applications in energy conversion and storage. Size-controlled Pt nanoparticles were prepared by a polyol method and deposited on H-ZSM-5 (SiO₂/Al₂O₃ = 30, 80, and 280) zeolite supports. The prepared catalysts were tested for the CO₂ hydrogenation in the temperature range of T = 473–873 K and ambient pressure, with CO₂/H₂ = 1:4. Size-controlled Pt nanoparticles boosted the catalytic activity of the pure H-ZSM-5 zeolites resulted in ~16 times higher CO₂ consumption rate. The activity were ~4 times higher and CH₄ selectivity at 873 K was ~12 times higher over 0.5% Pt/H-ZSM-5 (SiO₂/Al₂O₃ = 30) compared to 0.5% Pt/H-ZSM-5 (SiO₂/Al₂O₃ = 280). In-situ DRIFTS studies assuming the presence of a surface complex in which the CO is perturbed by hydrogen and adsorbes via C-end on Pt but the oxygen tilts to the protons of the zeolite support.