A5035766901- Ammonia Synthesis and Nitrogen Reduction
- MXene and MAX Phase Materials
- Advanced Photocatalysis Techniques
- Graphene research and applications
- Advancements in Battery Materials
- Perovskite Materials and Applications
- Advanced Battery Materials and Technologies
- Caching and Content Delivery
- Hydrogen Storage and Materials
- Nanomaterials for catalytic reactions
- Advanced Memory and Neural Computing
- Molecular Junctions and Nanostructures
- Advanced Condensed Matter Physics
- Chalcogenide Semiconductor Thin Films
- High-pressure geophysics and materials
- Electrocatalysts for Energy Conversion
- Nanoplatforms for cancer theranostics
- Advancements in Solid Oxide Fuel Cells
- Metal-Organic Frameworks: Synthesis and Applications
- Nanopore and Nanochannel Transport Studies
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Covalent Organic Framework Applications
- Catalysts for Methane Reforming
- Advanced battery technologies research
Delft University of Technology
2013-2025
Abstract Anode‐free aqueous zinc metal batteries (AZMBs) offer significant potential for energy storage due to their low cost and environmental benefits. Ti 3 C 2 T x MXene provides several advantages over traditional metallic current collectors like Cu Ti, including better Zn plating affinity, lightweight, flexibility. However, self‐freestanding in AZMBs remain underexplored, likely challenges with deposition reversibility. This study investigates the combination of a film advanced...
Direct electrochemical nitrogen reduction holds the promise of enabling production carbon emission-free ammonia, which is an important intermediate in fertilizer industry and a potential green energy carrier. Here we show strategy for ambient condition ammonia synthesis using hydrogen permeable nickel membrane/electrode that spatially separates electrolyte side from dinitrogen activation hydrogenation sites. Gaseous produced catalytically absence via adsorbed by electrochemically permeating...
We present an in situ small- and wide-angle X-ray scattering (SAXS/WAXS) quick-scanning extended absorption fine-structure (QEXAFS) spectroscopy study on the crystallization of metal-organic framework ZIF-7. In combination with DFT calculations, self-assembly growth ZIF-7 microrods together chemical function crystal modulator (diethylamine) are revealed at all relevant length scales, from atomic to full size.
Abstract Achieving both high redox activity and rapid ion transport is a critical pervasive challenge in electrochemical energy storage applications. This significantly magnified when using large‐sized charge carriers, such as the sustainable ammonium (NH 4 + ). A self‐assembled MXene/n‐type conjugated polyelectrolyte (CPE) superlattice‐like heterostructure that enables redox‐active, fast, reversible reported. The structure persists CPE:MXene ratio increases, accompanied by linear increase...
Catalyzing capping layers on metal hydrides are employed to enhance the hydrogenation kinetics of hydride-based systems such as hydrogen sensors. Here, we use a novel experimental method study catalyzing composed several alloys Pd and Au well Pt, Ni, Ru, all with without an additional PTFE polymer protection layer under same set conditions. In particular, employ thin Ta film optical indicator catalytic deposited top it which allows one determine absolute rates. Our results demonstrate that...
Abstract At ambient conditions, rare‐earth oxyhydride thin films show reversible photochromism and photoconductivity, while their mechanism relation are still unclear. In this work, question is explored with in situ time‐resolved measurements of both optical transport properties Gd‐based films. It found that p‐type large polaron conduction the initial charge transport; however, upon photo‐darkening, a 10 4 ‐fold increase conductivity occurs, n‐type carriers become dominant. Further,...
We have designed and realized a temperature pressure controlled cell for Neutron Reflectometry (NR) Small Angle Scattering (SANS) that is compatible with simultaneous optical transmission resistivity measurements. The can accommodate samples up to 102 mm (4 inch) in diameter, be pressurized from vacuum 10 bar gas the sample 350°C. four single crystal quartz windows ensure both good neutron hence used combination in-situ present illustrate its performance series of reflectometry experiments...
Wide-band-gap perovskites such as methylammonium lead bromide (MAPB) are promising materials for tandem solar cells because of their potentially high open-circuit voltage, which is yet still far below the maximum limit. The relatively short charge-carrier lifetimes deduced from time-resolved photoluminescence (TRPL) measurements seem in strong contrast with long observed photoconductance measurements. This explained by a large amount hole defect states, NT > 1016 cm–3, spin-coated layers...
Design and operation of a "six-flow fixed-bed microreactor" setup for Fischer-Tropsch synthesis (FTS) is described. The unit consists feed mixing, flow division, reaction, separation, analysis sections. reactor system made five heating blocks with individual temperature controllers, assuring an identical isothermal zone at least 10 cm along six microreactor inserts (4 mm inner diameter). Such lab-scale allows running experiments in parallel, under equal composition, reaction temperature,...
The electrochemical nitrogen reduction reaction (NRR) is a promising alternative to the current greenhouse gas emission intensive process produce ammonia (NH 3 ) from (N 2 ). However, finding an electrocatalyst that promotes NRR over competing hydrogen evolution (HER) has proven be difficult. This difficulty could potentially addressed by accelerating development for orders of magnitude using high-throughput (HTP) workflows. In this work, we developed HTP diffusion electrode (GDE) cell...
In this study, different surface pretreatments were applied to clean and activate titanium alloy surfaces. The samples subjected grit blasting treatments using two pressures afterwards, a UV/Ozone treatment was at times study the wettability oxidation of samples. Scanning electron microscopy laser confocal showed morphology increased roughness with pressure. X-ray Photoelectron Spectroscopy revealed that increasingly oxidized increasing time, which leads reduced contact angle better adhesive...
This paper describes a novel method to fabricate porous graphene oxide (PGO) from GO by exposure oxygen plasma. Compared other methods PGO described so far, e.g. the thermal and steam etching methods, plasma is much faster. We studied development of porosity with time using atomic force microscopy (AFM). It was found that upon oxygen-plasma can be controlled tapping mode AFM scanning Si tip. stalls growth pores further at level coincides fraction sp2 carbons in starting material. suggest...
Lithium metal with its high theoretical capacity and low negative potential is considered one of the most important candidates to raise energy density all-solid-state batteries. However, lithium filament growth induced solid electrolyte decomposition pose severe challenges realize a long cycle life. Here, dendrite in solid-state Li batteries alleviated by introducing dielectric material, barium titanate, as filler that removes electric field gradients catalyze formation. In symmetrical...
Abstract Chemical vapour deposition (CVD) has emerged as the dominant technique to combine high quality with large scale production of graphene. The key challenge for CVD graphene remains transfer film from growth substrate target while preserving material. Avoiding process single or multi-layered (SLG-MLG) recently garnered much more interest. Here we report an original method obtain a 4-inch wafer fully covered by MLG without any step substrate. We prove that is completely released on...
Silicon-aluminum-oxigen (SiAlO) coatings doped with Sm2+ and prepared by reactive magnetron co-sputtering of Si, Al, Sm targets, are attractive for luminescence solar concentrator applications but suffer from the low absorption between 300 600 nm. This article reports that main cause is a high concentration undesired Sm3+. finding supported optical transmittance, photoluminescence emission excitation characterization, X-ray photoelectron spectroscopy data Sm's 3d5/2 edge. We present an...
Mixed Sn–Pb halide perovskites are promising absorber materials for solar cells due to the possibility of tuning bandgap energy down 1.2–1.3 eV. However, tin-containing susceptible oxidation affecting optoelectronic properties. In this work, we investigated qualitatively and quantitatively metastable oxygen-induced doping in isolated ASnxPb1–xI3 (where A is methylammonium or a mixture formamidinium cesium) perovskite thin films by means microwave conductivity, structural optical...
Ammonium Ion Storage In article number 2402715, De-en Jiang, Guillermo Carlos Bazan, Xuehang Wang, and co-workers report on a self-assembled MXene/n-type conjugated polyelectrolyte (CPE) superlattice-like heterostructure that enables fast redox-active ammonium ion storage. The structure persists as the CPE:MXene ratio increases, we observed an unexpected intensification of CPE redox activity. This phenomenon can be explained by enhanced de-solvation due to increased volume 3 Å-sized pores.
Ammonia is an energy-rich molecule, primarily used as fertiliser and produced at large scale via the intensive Haber-Bosh process, which responsible for 1-2% of CO 2 emitted globally. 1 In recent years, electroreduction N to ammonia registered a bursting interest, motivated by urgent necessity meet fast-growing demand carbon neutral fertilisers sustainable fuels. However, synthesis in conventional electrochemical aqueous electrolyte systems facing serious challenges, such competing hydrogen...