A5042894359- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Catalysts for Methane Reforming
- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Carbon dioxide utilization in catalysis
- Nanomaterials for catalytic reactions
- 3D Surveying and Cultural Heritage
- Electrochemical Analysis and Applications
- Advancements in Solid Oxide Fuel Cells
- Granular flow and fluidized beds
- Thermochemical Biomass Conversion Processes
- Iron and Steelmaking Processes
- Metal Extraction and Bioleaching
Leibniz Institute for Catalysis
2022-2024
Universität Ulm
2019-2022
Escuela Politécnica del Ejército
2019
Universidad Nacional de Colombia
2014-2016
Abstract Ru/TiO 2 catalysts exhibit an exceptionally high activity in the selective methanation of CO ‐ and H ‐rich reformates, but suffer from continuous deactivation during reaction. This limitation can be overcome through fabrication highly active non‐deactivating by engineering morphology TiO support. Using anatase nanocrystals with mainly {001}, {100}, or {101} facets exposed, we show that after initial activation period ‐{100} ‐{101} are very stable, while ‐{001} deactivates...
Hydrogenation of CO2 is very attractive for transforming this greenhouse gas into valuable high energy density compounds. In work, we developed a highly active and stable Ru/TiO2 catalyst methanation prepared by solgel method that revealed much higher activity in (ca. 4–14 times turnover frequencies at 140–210°C) than state-of-the-art catalysts control sample wetness impregnation. This attributed to concentration O-vacancies, inherent the methodology, which play dual role 1) activation 2)...
O-vacancies are defects commonly correlated with the production of CH4 by CO2 hydrogenation on reducible catalysts. Their effect stability active COads and its origin is, however, not explored for low Ru-loaded catalysts (Ru < 0.5 wt%). Herein, we investigated two containing a comparable amount Ru (≈ 0.4 wt%) different zirconia supports: ZrO2 ZrO2-MgO (2.6 wt%-MgO). The rate formation Ru/ZrO2-MgO is ca. 3-fold higher than Ru/ZrO2. Combined results from various ex-situ in-situ...
Abstract A heterogeneous single‐atom catalyst (SAC) based on a tiny Cu loading (0.05 wt.%) supported CeO 2 −TiO (Ce/Ti=0.18) shows very high mass‐normalized CO oxidation activity, 100 % selectivity for between 60 and °C essentially no deactivation during 17 h stream in the preferential of (PROX) at 120 °C. Based state art, this is among most active PROX‐selective catalysts. Employing combination ex‐situ operando methods, we infer that isolated single sites are incorporated with redox‐active...
Abstract Understanding and enhancing the activity of heterogeneous single‐atom catalysts (SACs) are indispensable aspects to use them in industrial applications. Among these, low‐temperature CO oxidation is considered as a model reaction for testing wide‐range catalysts, an essential process exhaust aftertreatment modern combustion engines. This study demonstrates that Cu/CeO 2 −TiO SAC can be fine‐tuned by controlling Ce/Ti ratio CeO supports, with highest catalytic achieved molar 0.18....
Abstract Ru/TiO 2 ‐Katalysatoren sind sehr aktiv für die selektive Methanisierung von CO in ‐ und H ‐reichen Reformat‐Gasmischungen, werden aber während der Reaktion leicht deaktiviert. Diese Einschränkung kann mithilfe hoch‐aktiver nicht deaktiviert werdender über gezielte Optimierung Morphologie des TiO ‐Trägers überwunden werden. Anhand hauptsächlich aus {001}‐, {100}‐ oder {101}‐facettierten Nanokristalliten bestehenden Trägern können wir zeigen, dass nach einer anfänglichen...
Nickel, nickel-chromium alloy and nickel-aluminum electrodes have been evaluated by cyclic voltammetry to explore the possibility oxidize dissolved coal in molten KOH means of these materials. Voltammograms, without presence melt, exhibit signals corresponding nickel oxidized species which, coal, change intensity. These changes arising new attributed oxidation processes which involve organic molecules. The information obtained after non linear regression analysis calculate kinetic parameters...
Una de las tendencias actuales la fotogrametría aérea es el uso UAV (Unmanned Aerial Vehicle) o vehículos aéreos no tripulados. La toma imágenes desde estos dispositivos gran ayuda en un sin número aplicaciones, principalmente área ciencias geográficas y agropecuarias. Algunos los productos más populares a nivel investigación son modelos digitales superficies, curvas nivel, cartografía, ortomosaicos multiespectrales. Para lograr obtener que estén dentro calidad exigida por normas, necesario...