A5089507459- Chemical Looping and Thermochemical Processes
- Catalytic Processes in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Catalysts for Methane Reforming
- Carbon Dioxide Capture Technologies
- Advancements in Solid Oxide Fuel Cells
- MXene and MAX Phase Materials
- Catalysis and Oxidation Reactions
- Industrial Gas Emission Control
- Thermal Expansion and Ionic Conductivity
- Metal Extraction and Bioleaching
- Electronic and Structural Properties of Oxides
- Nanomaterials for catalytic reactions
- 2D Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Advanced materials and composites
- Advanced Photocatalysis Techniques
- Concrete Properties and Behavior
- Magnesium Oxide Properties and Applications
- Layered Double Hydroxides Synthesis and Applications
- Concrete and Cement Materials Research
ETH Zurich
2013-2022
Lomonosov Moscow State University
2012
MXenes, a recently discovered family of two-dimensional (2D) materials, are promising catalysts and supports for applications in heterogeneous catalysis; however, the thermal stability MXenes their surface chemistry not fully explored. Here, we report that 2D molybdenum carbide Mo2CTx remains stable shows no appreciable sintering up to ca. 550–600 °C reducing environment, as assessed by combined situ X-ray absorption near-edge spectroscopy (XANES) powder diffraction (XRD) study during...
Abstract The two-dimensional morphology of molybdenum oxycarbide (2D-Mo 2 CO x ) nanosheets dispersed on silica is found vital for imparting high stability and catalytic activity in the dry reforming methane. Here we report that owing to maximized metal utilization, specific 2D-Mo /SiO exceeds other Mo C catalysts by ca. 3 orders magnitude. activated , yielding a surface oxygen coverage optimal its performance oxidation state +4. According ab initio calculations, DRM proceeds sites nanosheet...
Abstract Carbon dioxide capture and storage (CCS) is a promising approach to reduce anthropogenic CO 2 emissions mitigate climate change. However, the costs associated with of using currently available technology, that is, amine scrubbing, are considered prohibitive. In this context, so‐called calcium looping process, which relies on reversible carbonation CaO, an attractive alternative. The main disadvantage naturally occurring CaO‐based sorbents, such as limestone, their rapid deactivation...
Calcium looping (CaL) is a CO2 capture technique based on the reversible carbonation/calcination of CaO that considered promising to reduce anthropogenic emissions. However, rapid decay uptake over repeated cycles carbonation and calcination due sintering limits its implementation at industrial scale. Thus, development material design strategies stabilize capacity paramount. The addition alkali metal salts has been proposed as strategy mitigate loss cyclic capacity. there are conflicting...
Calcium looping, a CO2 capture technique based on the cyclic carbonation and calcination of CaO, is promising short- to midterm solution reduce emissions. However, CaO suffers from sintering under industrially relevant operating conditions, which reduces rapidly its uptake capacity. Here, we report design manufacture hierarchical, porous (HP) CaO-based sorbent. The hierarchically sorbent created through assembly calcium carbonate nanoparticles monodisperse oil droplets generated via...
Nanosheets of molybdenum(<sc>vi</sc>) oxide supported on carbon spheres were carburized and utilized for the dry reforming methane (DRM). A molybdenum oxycarbide phase was identified as active DRM characterised by XANES TEM methods.
Abstract Furthermore, deposition at such low temperatures is promising for processing of thin film assemblies. The preparation bi‐layer electrolytes yttria stabilized zirconia and gadolinia doped ceria films by aerosol assisted chemical vapor demonstrated. Gadolinia as 150 nm are applied barrier layers between electrolyte La 0.6 Sr 0.4 CoO 3–δ cathode in anode supported solid oxide fuel cells. High power densities above 850 mW cm –2 650 °C only obtained with these layers, indicating that the...
Abstract Chemical looping combustion (CLC) and chemical with oxygen uncoupling (CLOU) are emerging thermochemical CO 2 capture cycles that allow the of a small energy penalty. Here, development suitable carrier materials is key aspect to transfer these promising concepts practical installations. CuO an attractive material for CLC CLOU because its high oxygen‐storage capacity (20 wt %), fast reaction kinetics, equilibrium partial pressure at typical operating temperatures (850–1000 °C)....
Chemical looping is a promising process to produce high purity H2 while simultaneously capturing CO2. The key requirement for this the availability of oxygen carriers that possess cyclic redox stability, resistance carbon deposition, and thermal sintering. In study, ZrO2-supported Fe2O3-based were developed using coprecipitation technique. We assess in detail influence synthesis parameter, i.e., pH value at which precipitation was performed, on morphological properties, chemical composition,...
In situ Mo K-edge X-ray absorption spectroscopy reveals different carburization pathways for unsupported and supported MoO 3 yielding 2 C C/SiO . features higher resistance to oxidation under dry reforming of methane than C.