A5028164809- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Electrochemical Analysis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Catalysts for Methane Reforming
- Advanced Nanomaterials in Catalysis
- Catalysis and Oxidation Reactions
- Catalysis for Biomass Conversion
- Catalytic Processes in Materials Science
- Supercapacitor Materials and Fabrication
- Catalysis and Hydrodesulfurization Studies
- Silicon Nanostructures and Photoluminescence
- Chemical Looping and Thermochemical Processes
- Synthesis and characterization of novel inorganic/organometallic compounds
- Carbon Dioxide Capture Technologies
- Covalent Organic Framework Applications
- High Entropy Alloys Studies
- Semiconductor materials and interfaces
- Carbon dioxide utilization in catalysis
- Microbial Fuel Cells and Bioremediation
- Chalcogenide Semiconductor Thin Films
- Mesoporous Materials and Catalysis
- Semiconductor materials and devices
Delft University of Technology
2021-2023
Russian Academy of Sciences
2023
King Abdullah University of Science and Technology
2020-2021
Eindhoven University of Technology
2015-2020
Novosibirsk State University
2014
Catalyst stability in the liquid phase under polar conditions, typically required for catalytic conversion of renewable platform molecules, is a major concern but has been only sparsely studied. Here, activity, selectivity, and Ru-based catalysts supported on TiO2, ZrO2, C levulinic acid (LA) to γ-valerolactone (GVL) studied at 30 bar H2 423 K dioxane as solvent. All showed excellent yields GVL when used fresh, Ru/ZrO2 catalyst could maintain these high upon multiple recycling. Surprisingly,...
Ultrathin single-crystalline RuO2(110) films supported on Ru(0001) are employed as model electrodes to extract kinetic information about the industrially important chlorine evolution reaction (CER) in a 5M concentrated NaCl solution under well-defined electrochemical conditions and variable temperatures. A combination of chronoamperometry (CA) online mass spectrometry (OLEMS) experiments provides insight into selectivity issue: At pH = 0.9, CER dominates over oxygen evolution, whereas at...
The one-step synthesis and characterization of a new robust titanium-based metal-organic framework, ACM-1, is reported. In this structure, which based on infinite Ti-O chains 4,4',4'',4'''-(pyrene-1,3,6,8-tetrayl) tetrabenzoic acid as photosensitizer ligand, the combination highly mobile photogenerated electrons strong hole localization at organic linker results in large charge-separation lifetimes. suitable energies for band gap conduction minimum (CBM) offer great potential wide range...
Dehydrogenation promoters greatly enhance the performance of SiO2–MgO catalysts in Lebedev process. Here, effect preparation method and order addition Cu on structure Cu-promoted materials is detailed. Addition to MgO via incipient wetness impregnation (IWI) or coprecipitation (CP) prior wet-kneading with SiO2 gave similar butadiene yields (∼40%) as when was added already wet-kneaded catalyst. In contrast, catalyst prepared by first proved be worst series. TEM, XRD, XPS analyses suggested...
A method to reduce noble metal content in oxygen-evolving electrocatalysts suitable work acidic media is presented. TiO2-RuO2 anodes can be promoted by Mn, resulting increased activity and stability. The most active composition displayed an overpotential of 386 mV at a current density 10 mA cm–2, Tafel slope 50 dec–1. This anode only included 17 at% Ru out the total amount metals film. We investigated influence Mn addition on structure, morphology, surface area, related differences catalytic...
Anodic polarization conducted at high current density, elevated temperature, and KOH concentration impacted the structure performance of NiFeO<sub>x</sub>H<sub>y</sub>and NiO<sub>x</sub>H<sub>y</sub>anodes.
Abstract Cobalt phosphides are an emerging earth‐abundant alternative to platinum‐group‐metal‐based electrocatalysts for the hydrogen evolution reaction (HER). Yet, their stability is inferior platinum and compromises large‐scale applicability of CoP x in water electrolyzers. In present study, we employed flat, thin electrodes prepared through thermal phosphidation (PH 3 ) Co O 4 films made by plasma‐enhanced atomic layer deposition evaluate acidic electrolysis using a multi‐technique...
γ-Valerolactone (GVL) is readily obtained by the hydrogenation of levulinic acid (LA) and considered a sustainable platform chemical for production biobased chemicals. Herein, performance stability Ru-based catalysts (1 wt % Ru) supported on TiO2 (P25) ZrO2 (monoclinic) LA to GVL investigated in liquid phase batch continuous-flow reactors using water dioxane as solvents. Particular attention paid influence possible impurities feed catalyst hydrogenation. Benchmark experiments at extended...
RuO2 is commercially employed as an anodic catalyst in the chlor-alkali process. It also one of most active electrocatalysts for oxidation water, relevant to electrochemical water splitting. However, use limited by its low stability under acidic conditions, especially at high overpotentials. In present work, model RuO2(110)/Ru(0001) anodes was investigated order gain a deeper understanding relation between structure and performance Cl2 O2 evolution reactions (CER OER, respectively). Online...
CO2 electrolysis might be a key process to utilize intermittent renewable electricity for the sustainable production of hydrocarbon chemicals without relying on fossil fuels. Commonly used carbon-based gas diffusion electrodes (GDEs) enable high Faradaic efficiencies desired carbon products at current densities, but have limited stability. In this study, we explore adaption carbon-free GDE from Chlor-alkali as cathode gas-fed electrolysis. We determine impact electrowetting electrochemical...
Abstract The one‐step synthesis and characterization of a new robust titanium‐based metal–organic framework, ACM‐1 , is reported. In this structure, which based on infinite Ti−O chains 4,4′,4′′,4′′′‐(pyrene‐1,3,6,8‐tetrayl) tetrabenzoic acid as photosensitizer ligand, the combination highly mobile photogenerated electrons strong hole localization at organic linker results in large charge‐separation lifetimes. suitable energies for band gap conduction minimum (CBM) offer great potential wide...
Titanium-based metal-organic framework, NH2-MIL-125(Ti), has been widely investigated for photocatalytic applications but low activity in the hydrogen evolution reaction (HER). In this work, we show a one-step low-cost postmodification of NH2-MIL-125(Ti) via impregnation Co(NO3)2. The resulting Co@NH2-MIL-125(Ti) with embedded single-site CoII species, confirmed by XPS and XAS measurements, shows enhanced under visible light exposure. increased H2 production is likely triggered presence...
High-entropy alloys are promising materials for novel thin-film resistors since they have high resistivity and a low-temperature coefficient of (TCR). In this work, new high-entropy CoCrFeNiTix was deposited on Si/SiO2 substrate by means magnetron sputtering the multi-component target produced hot pressing powder mixture. The samples possessed thickness 130–230 nm an amorphous atomic structure with nanocrystallite traces. This persisted after being annealed up to 400 °C, which confirmed...
Abstract The direct hydrogenation of CO 2 to higher alcohols has the potential turn main contributor global warming into a valuable feedstock. However, for this technology become attractive, more efficient and, especially, selective catalysts are required. Here we present high throughput study on influence different promoters performance Rh−SiO catalysts. Fe and K were found improve ethanol selectivity at expense undesired CH 4 . best‐performing catalyst, with composition wt.% K, 20 Fe, 5...
Colloidal synthesis routes have been recently used to fabricate heterogeneous catalysts with more controllable and homogeneous properties. Herein a method was developed modify the surface composition of colloidal nanocrystal purposely introduce specific atoms via ligands change catalyst reactivity. Organic adsorbed on iron oxide were exchanged inorganic species such as Na2S, not only provide an active but also controlled amounts Na S acting promoters for catalytic process. The optimized...
The evaluation of faradaic efficiencies is essential to unambiguously determine the origin photocurrents as showcased for electrochemically conditioned p-InP.
Abstract A novel combination of Surface X‐ray Scattering techniques (SXS), i. e. GISAXS (Grazing‐Incidence Small‐Angle X‐Ray Scattering), XRR (X‐Ray Reflectivity) and SXRD (Surface Diffraction) alongside with simultaneous detection gaseous products by OLEMS (On‐Line Electrochemical Mass Spectrometry) has been applied to study under operando conditions structure‐activity relationships a Pt model electrocatalyst. The SXS‐OLEMS is able follow dynamic changes in surface morphology...
The Lewis basicity of typical electron donor compounds used to modify heterogeneous Ziegler–Natta catalysts, such as diakyl ethers, silyl esters, and ketones, was characterized by determining their effects on the IR frequency surface silanol groups silica gel, which correlate with heat this specific interaction “donicity”, i.e., formation complexes SbCl5. In manner, ethers are found be more basic than ketones esters. These differences in likely affect stereoregulating properties...
Abstract NiFeO x thin films prepared by successive ionic layer adsorption and reaction (SILAR) were deposited onto nanostructured hematite (Fe 2 O 3 ) photoanodes their effect on the current density photo‐onset potential was studied. After optimization of bath concentration, immersion times, number SILAR cycles, very conformal active with controlled Fe/Ni content ratios obtained. Upon incorporation Fe 2+ species in NiCl solution bath, a cathodic shift overpotential required for oxygen...