Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica-Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo-Biocatalytic Cascade Reactions in Continuous Flow Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, et al. Advanced Functional Materials, 2026 In green and sustainable chemistry, coupling biocatalysis and photocatalysis in cascade processes is particularly appealing. It enables reactions at ambient temperature in aqueous solutions with light as an abundant energy source. Additionally, it merges the high reactivity of photocatalysts with the unique selectivity of biocatalysts. However, such cascade processes, especially when conducted in one‐pot mode, pose the challenges of mutual catalyst deactivation and opposite optimal conditions for each catalytic step. In this work, the design of hybrid supraparticles consisting of the nanoparticular photocatalyst graphitic carbon nitride and the enzyme horseradish peroxidase immobilized on silica nanoparticles is proposed. A compatibility range where both catalysts can coexist within the hybrid supraparticles and function effectively, both in one‐pot batch and continuous flow processes, is identified using the photocatalytic hydrogen peroxide production and the enzymatic 3,3′,5,5′‐tetramethylbenzidine conversion as a model cascade reaction.
Operando Study of the Active Phase in Liquid GaPt Alloy Catalysts Michael S. Moritz, Christoph Wichmann, Marius Steinmetz, Hans‐Peter Steinrück, Christian Papp Small Science, 2026 The operando study investigates propane dehydrogenation (PDH) using a liquid gallium‐platinum catalyst based on the supported catalytically active liquid metal solutions (SCALMS) concept. The focus is on monitoring and analyzing the active phase during reaction using near‐ambient pressure X‐ray photoelectron spectroscopy (NAPXPS) combined with gas phase analysis. This approach proves practical in tracking surface changes and chemical states during catalytic reactions, providing real‐time insights into the catalyst behavior. PDH, an industrially significant reaction, is investigated using a GaPt SCALMS with 1 at.% Pt content. The findings reveal that metallic liquid GaPt SCALMS exhibit high activity, while the presence of oxygen in the feed stream significantly lowers the activity of the catalyst. While current liquid metal catalysts often experience an activation period, a pathway to achieving stable conversion rates right after the start is demonstrated. This stability lays a foundation for developing next‐generation catalysts with improved performance. The investigation also highlights the critical influence of oxidic Ga on catalytic activity, offering valuable guidance for optimizing catalyst design. Overall, the findings underscore the practical importance of NAPXPS in advancing the understanding of surface properties in catalytic systems.
Bromination of 2D materials Eva Marie Freiberger, Julien Steffen, Natalie J Waleska-Wellnhofer, Felix Hemauer, Valentin Schwaab, et al. Nanotechnology, 2024
Nano-SMSI on Bimetallic FePt Clusters Natalie J. Waleska-Wellnhofer, Eva Marie Freiberger, Felix Hemauer, Valentin Schwaab, Christian Papp Journal of Physical Chemistry C, 2023
Reaction of Hydrogen and Oxygen on h-BN Florian Späth, Johann Steinhauer, Fabian Düll, Udo Bauer, Philipp Bachmann, et al. Journal of Physical Chemistry C, 2020
Hydrogen, chemically stored Nachrichten Aus Der Chemie, 2014
Graphene-templated growth of Pd nanoclusters Karin Gotterbarm, Christian Steiner, Carina Bronnbauer, Udo Bauer, Hans-Peter Steinrück, et al. Journal of Physical Chemistry C, 2014
Growth and oxidation of graphene on Rh(111) Karin Gotterbarm, Wei Zhao, Oliver Höfert, Christoph Gleichweit, Christian Papp, et al. Physical Chemistry Chemical Physics, 2013
Wet chemical synthesis of graphene Siegfried Eigler, Michael Enzelberger‐Heim, Stefan Grimm, Philipp Hofmann, Wolfgang Kroener, et al. Advanced Materials, 2013
Sulfur oxidation on Pt(355): It is the steps! Regine Streber, Christian Papp, Michael P. A. Lorenz, Andreas Bayer, Reinhard Denecke, et al. Angewandte Chemie International Edition, 2009
