A5045842591- Thermochemical Biomass Conversion Processes
- Lignin and Wood Chemistry
- Catalysis for Biomass Conversion
- Nanomaterials for catalytic reactions
- Advanced Cellulose Research Studies
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Ammonia Synthesis and Nitrogen Reduction
- Carbon dioxide utilization in catalysis
- Advanced battery technologies research
- Molecular Junctions and Nanostructures
- Fuel Cells and Related Materials
- Mesoporous Materials and Catalysis
- Heat transfer and supercritical fluids
- Biofuel production and bioconversion
- Petroleum Processing and Analysis
- Coal Properties and Utilization
- Flame retardant materials and properties
- Thermal and Kinetic Analysis
- Fiber-reinforced polymer composites
- Catalysts for Methane Reforming
- Asymmetric Hydrogenation and Catalysis
- Iron and Steelmaking Processes
- Marine Biology and Environmental Chemistry
- Polymer Surface Interaction Studies
Ruhr University Bochum
2018-2023
Abstract Breakthroughs toward effective water‐splitting electrocatalysts for mass hydrogen production will necessitate material design strategies based on unexplored chemistries. Herein, Ni‐metalloid (B, Si, P, As, Te) alloys are reported as an emergent class of highly promising the oxygen evolution reaction (OER) and insight is offered into origin activity enhancement premise surface electronic structure, OER activation energy, influence guest metalloid elements lattice structure host metal...
Abstract Biomass‐derived 5‐hydroxymethylfurfural (HMF) is regarded as one of the most promising platform chemicals to produce 2,5‐dimethylfuran (DMF) a potential liquid transportation fuel. Pd nanoparticles supported on N‐containing and N‐free mesoporous carbon materials were prepared, characterized, applied in hydrogenolysis HMF DMF under mild reaction conditions. Quantitative conversion was achieved presence formic acid (FA) H 2 over Pd/NMC within h. The mechanism, especially multiple...
Abstract Development of metal‐free carbon‐based electrocatalysts for reducing oxygen to water (ORR), preferentially following a 4 electron transfer pathway, is high importance. We present two‐step synthesis N‐doped ORR by using an efficient thermal treatment hydrothermally carbonized cellulose in ammonia combining devolatilization, reduction and nitrogen doping. The influence the temperature as well concentration used during on electrocatalytic activity was analyzed bulk‐ surface‐sensitive...
Pd nanoparticles deposited on nitrogen-doped mesoporous carbon are promising catalysts for highly selective and effective catalytic hydrogenation reactions. To design utilize these novel catalysts, it is essential to understand the effect of N doping metal-support interactions. A combined experimental (X-ray photoelectron spectroscopy) computational (density functional theory) approach used identify preferential adsorption sites give detailed explanations corresponding Pyridinic atoms turned...
While zwitterionic interfaces are known for their excellent low-fouling properties, the underlying molecular principles still under debate. In particular, role of zwitterion orientation at interface has been discussed recently. For elucidation effect this parameter, self-assembled monolayers (SAMs) on gold were prepared from stoichiometric mixtures oppositely charged alkyl thiols bearing either a quaternary ammonium or carboxylate moiety. The chain length cationic component...
Abstract Aus Biomasse gewonnenes 5‐Hydroxymethylfurfural (HMF) gilt als vielversprechende Plattformchemikalien zur Herstellung von 2,5‐Dimethylfuran (DMF) flüssigen Transportkraftstoff. Pd‐Nanopartikel auf N‐haltigen und N‐freien mesoporösen Kohlenstoffmaterialien wurden hergestellt, charakterisiert bei der Hydrogenolyse HMF zu DMF unter milden Reaktionsbedingungen eingesetzt. Die quantitative Umwandlung wurde in Gegenwart Ameisensäure (FA) H 2 über Pd/NMC innerhalb h erreicht. Der...
The evolution of oxygen functional groups (OFGs) and the associated thermic effects upon heat treatment up to 800 °C were investigated experimentally as well by theoretical calculations. A synthetic carbon with a carbonaceous structure close that natural chars, yet mineral-free, was derived from cellulose oxidized HNO3 vapor at different temperatures for varied durations in order generate char samples concentrations distributions OFGs. functionalized subjected calorimetric...
The catalytic effect of minerals on biomass conversion was studied focusing Fe as well alkali and alkaline earth metals the metallic inorganic elements typically present in found biomass. A mineral-free reference hydrochar an analogous char material based cellulose were systematically doped with sulfates different various amounts via impregnation, thereby excluding differences originating from counterion carbon matrix. Thermogravimetric reactivity measurements performed diluted O2 CO2,...
The detailed catalytic influence of minerals on solid biomass in oxy-fuel combustion is yet to be fully understood. metal sulfates a mineral-free, cellulose-based model was investigated during slow and high heating air combustion. Measurements were performed thermogravimetric setup with rates flat-flame burner oxy-combustion atmosphere rates. Temperature-programmed experiments identified the activity scale Fe > K Na Mg ~ Ca synthetic (20% O 2 /He) for sulfates. highly active metals chosen...
Biomass char conversion is substantially influenced by metals contained in the material.One of main catalytically active biomass Fe which occurs various mineral forms.For an implementation catalytic effects into models, investigations on type and loading are required.In this work, effect series oxidation inherently mineral-free was analysed.Characterisations focused phase present identifying its transition from FeSO4 to γ-Fe2O3 during doping, further ε-Fe2O3 α-Fe2O3 upon oxidation.A very...