A5002962939- Electrocatalysts for Energy Conversion
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Fuel Cells and Related Materials
- Polyoxometalates: Synthesis and Applications
- Advanced Photocatalysis Techniques
- Conducting polymers and applications
- Ammonia Synthesis and Nitrogen Reduction
- Metal-Organic Frameworks: Synthesis and Applications
- Caching and Content Delivery
- Nanomaterials for catalytic reactions
- Advanced Memory and Neural Computing
Johannes Gutenberg University Mainz
2022-2024
Universität Ulm
2022-2024
The activation of molecular hydrogen is a key process in catalysis. Here, we demonstrate how polyoxometalate (POM)-based heterogeneous compounds functionalized with Platinum particles activate H2 by synergism between spillover mechanism and electron-proton transfer the POM. This interplay facilitates selective catalytic reduction olefins nitroarenes high functional group tolerance. A family polyoxotungstates covalently boronic acids reported. In solid-state, are held together non-covalent...
Abstract Defect engineering is a key chemical tool to modulate the electronic structure and reactivity of nanostructured catalysts. Here, it reported how targeted introduction defect sites in 2D palladium metallene nanostructure results highly active catalyst for alkaline oxygen reduction reaction (ORR). A defect‐rich WO x MoO modified Pd (denoted: D‐Pd M) synthesized by facile scalable approach. Detailed structural analyses reveal presence three distinct atomic‐level defects, that are...
The design of efficient and stable oxygen evolution reaction (OER) catalysts based on noble-metal-free materials is crucial for energy conversion storage. In this work, it was demonstrated how polyoxometalate (POM)-doped ZIF-67 can be converted into a electrocatalyst by chemical etching, cation exchange, thermal annealing steps. Characterization X-ray photoelectron spectroscopy, transmission electron microscopy, energy-dispersive spectroscopy Raman indicate that POM-doped derived...
The design of efficient and stable oxygen evolution reaction (OER) catalysts-based earth-abundant metal precursors is crucial for large-scale energy conversion storage. To-date, many catalyst materials are limited by poor stability in harsh oxidative conditions. Thus, much research targeted at developing that can operate under demanding OER One promising approach the in-situ formation catalysts which inherently oxidizing, alkaline conditions often used studies. Here, we report how mixed...
Defect engineering is a key chemical tool to modulate the electronic structure and reactivity of nanostructured catalysts. Here, we report how defects in palladium metallene nanostructure results highly active catalyst for alkaline oxygen reduction reaction (ORR). A defect-rich WOx MoOx modified Pd (denoted as D-Pd M) was synthesized by facile wet-chemical method. Detailed structural analyses reveal presence three distinct atomic-scale defects, that pores, concave surfaces, surface-anchored...
The development of earth-abundant element-based highly active and efficient catalysts for the oxygen evolution reaction (OER) is crucial sustainable energy conversion technologies. In this work, we successfully used Ni-modified Keggin-type polyoxometalate ([PNi(H2O)W11O39]5-) as a precursor to chemically modify zeolitic imidazolate framework ZIF 67 via facile one-pot method. resulting composite catalyst shows promising electrocatalytic OER performance in 1M aqueous KOH solution with high...
The conversion of mixed metal sulfide precursors into active and robust oxide/hydroxide oxygen evolution reaction electrocatalysts is reported.
Abstract Electrocatalytic nitrate reduction is a promising approach to remove harmful and produce ammonia in aqueous media. Here, we demonstrate how 3D printed polymer electrodes can be electroless plated with bimetallic NiCu alloy film suitable for sustained nitrate‐to‐ammonia reduction. Characterization by powder X‐ray diffraction, photoelectron spectroscopy, scanning/transmission electron microscopy energy‐dispersive spectroscopy indicate that the electrode has two‐layer structure...
Electrocatalytic water splitting is a key technology for sustainable energy. To-date, designing electrodes from the atomic level to nano- and microstructure promising route address challenges ranging catalytic activity stability mass transport gaseous product release. Thus, developing facile routes well-defined with high still challenge. As an additive fabrication technology, 3D printing enables of electrochemical devices in novel way. Here, we developed wet chemical methods, including...
Abstract The activation of molecular hydrogen is a key process in catalysis. Here, we demonstrate how polyoxometalate (POM)‐based heterogeneous compounds functionalized with Platinum particles activate H 2 by synergism between spillover mechanism and electron‐proton transfer the POM. This interplay facilitates selective catalytic reduction olefins nitroarenes high functional group tolerance. A family polyoxotungstates covalently boronic acids reported. In solid‐state, are held together...