355 zoekresultaten voor “catalysis surface” in de Publieke website
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Assembling anisotropic colloidal building blocks
This PhD-thesis presents a study on micron-sized particles, so-called colloids. By controlling the chemical and physical properties of these particles, such as the interparticle interaction and the particles’ shape, colloids can act as building blocks that self-assembly into larger structures.
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Photosynthetic light reactions at the gold interface
Promotor: T.J. Aartsma, Co-promotor: R.N. Frese
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Mononuclear spin-transition materials based on the bapbpy scaffold
Promotor: Prof.dr. E. Bouwman, Co-Promotor: S. Bonnet
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Magnetic Resonance Force Microscopy and the Spin Bath
There are many interpretations of quantum mechanics, and ultimately experiments are needed to verify or falsify these interpretations.
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Understanding protein complex formation: The role of charge distribution in the encounter complex
Protein–protein complexes are formed via transient states called encounter complexes that greatly influence the formation of the stereospecific complex.
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Een opvouwbare telefoon? STIBNITE ging op zoek naar de perfecte halfgeleider
Oprolbare zonnepanelen, buigbare telefoondisplays of betere computerchips… Het EU-project STIBNITE onderzocht de volgende generatie halfgeleiders, gemaakt van organische materialen gebaseerd op koolstof, stikstof en boor. Het project is nu ten einde. Tijdens het Open Science Debate op 1 juli presenteert…
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Chemici lossen hardnekkig probleem op na vier decennia
Leidse en Eindhovense scheikundigen hebben na decennia de discussie beëindigd over het juiste model voor de eenvoudigste chemische reactie in heterogene katalyse, die essentieel is voor brandstofcellen. Met behulp van een uniek gekromd platinaoppervlak toonden de Leidse Ludo Juurlink, zijn promovendus…
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Pesticides Atlas, Pilot Study
Description of Atlas of the surfacewater concentrations of pesticides in the Netherlands, a pilotstudy.
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Improving vegetation representation in Multi-sensor Earth Observation Products through phenology and trait-based priors
What are the behaviours of plant traits throughout various points in the growing season in a radiative transfer model framework and how well can this knowledge be integrated through data assimilation to provide priors for robust local and global vegetation products and analysis?
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Surface Temperature and the Dynamics of H2 on Cu(111)
Promotie
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Atomic Insights into Hydrodesulfurization
Hydrodesulfurization (HDS) is an ubiquitous part of oil refining that ensures that fuels are cleaned of impurities and environment release of pollutants such as SOx and NOx gasses are minimized.
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Synergy Study: Sentinel2 –Sentinel3 Land Products
To deliver a Virtual Sensor tool optimised to exploit the synergy between Sentinels 2 and 3 to allow the consistent retrieval of land surface parameters (Albedo, LAI, and LST); To extend the existing capabilities of land EO data assimilation tools to add capacity to handle data in the thermal domain…
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Effects of pesticides on aquatic macrofauna in the field
Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver
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Spin-label EPR Approaches to Protein Interactions
Promotor: Prof.dr. E.J.J. Groenen, Co-Promotor: M. Huber
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Geert-Jan Kroes
Wiskunde en Natuurwetenschappen
g.j.kroes@chem.leidenuniv.nl | +31 71 527 4396
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Eindelijk begrijpen we hoe zuurstof aan platina reageert
Platina is een veelgebruikte katalysator, maar de precieze werking ervan is voor wetenschappers grotendeels een mysterie. Ludo Juurlink heeft voor het eerst aangetoond hoe zuurstof reageert aan het platina-oppervlak. De bevindingen publiceert hij met de promovendi Kun Cao en Richard van Lent en internationale…
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Gevestigd idee in scheikunde blijkt toch niet zo algemeen
Het is een algemene regel binnen de scheikunde: het coördinatiegetal van een katalysator bepaalt de reactiviteit van de chemische reactie die het versnelt. Opvallend genoeg hebben Leidse scheikundigen nu aangetoond dat dit niet opgaat voor de meeste eenvoudige chemische reactie die er bestaat: de dissociatie…
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Artificial metallo-proteins for photocatalytic water splitting: stability and activity in artificial photosynthesis
Climate change is one of the largest challenges faced by humanity. To combat this research into alternatives to fossil fuels is ongoing. Dihydrogen is considered a good alternative fuel, since its burning only forms water.
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Onno van der Heijden
Wiskunde en Natuurwetenschappen
o.van.der.heijden@lic.leidenuniv.nl | 071 5272727
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Charlotte Jansen
Wiskunde en Natuurwetenschappen
c.jansen@lic.leidenuniv.nl | +31 71 527 2727
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Understanding the Surface Structure of Catalysts and 2D Materials at the Atomic Scale
Promotie
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Role of near-surface environment in tuning electrochemical CO2 reduction reaction and H2 evolution reaction
Promotie
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Determination of surface formation energies on curved single crystals from STM images
Promotie
- Een kijkje in de keuken bij de chemische industrie: katalyse
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On shape and elasticity: bio-sheets, curved crystals, and odd droplets
Because thin systems can deform along the thickness with relative ease, the interplay between surface mechanics and geometry plays a fundamental role in sculpting their three-dimensional shape.
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Knots in plasma
A plasma is an ionized gas with very low electrical resistivity. As such, magnetic field lines are 'frozen in' and move with the fluid. Magnetic field lines that are linked, knotted and tangled, cannot be undone by the fluid motions.
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On electronic signatures of topological superconductivity
Promotor: Prof.dr. C.W.J. Beenakker
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Synthesis and applications of cell wall glycopolimer fragments from Staphilococci and Enterococci
Carbohydrates are present on the surface of bacteria making them suitable antigen candidates for vaccine development. This thesis deals with the synthesis of two carbohydrate-based components; the capsular polisaccharide of S. aureus type 5 and teichoic acids from staphilococci and enterococci speci…
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Fundamental research on the voltammetry of polycrystalline gold
Voltammetry plays a crucial role in modern scientific research by offering valuable insights into the electrochemical properties of materials, with wide-ranging applications in fields such as materials science, energy storage, corrosion studies, and sensor development.
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Functionalized two-dimensional membranes and materials for solar-to-fuel devices: a multiscale computational approach
In the current global context, there is a pressing need to address sustainable energy supplies to safeguard our Planet and its ecosystems. The choices made by human society have a significant impact on genetic evolution and climate.
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Bestrijdingsmiddelen en Milieu
The book ‘Bestrijdingsmiddelen en Milieu' gives a transparent overview of facts and figures concerning pesticide use in the Netherlands and the impact of pesticides on the environment.
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Formulation of influenza T cell peptides: In search of a universal influenza vaccine
Promotores: Prof.dr. G.F.A. Kersten, W. Jiskoot, Co-promotor: J-P. Amorij
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Peeking into the future: Fungi in the greening Arctic
Promotor: E.F. Smets, Co-promotor: J. Geml
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Low energy electron transmission through layered materials and chiral organic films
In this Ph.D. thesis we study the interaction of low energy electrons with thin materials, namely layered materials (graphene, hexagonal boron nitride, molybdenum disulfide) and organic films. At these low energies the quantum mechanical wavelength of the electron wave function is in the order of a…
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Advances in SQUID-detected Magnetic Resonance Force Microscopy
In this thesis, we describe the latest advances in SQUID-detected Magnetic Resonance Force Microscopy (MRFM).
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PNEC-pro
PNEC-pro is a user-friendly screening tool for professionals dealing with the assessment of surface water quality. The tool calculates local, watertype specific no-effect concentrations (PNEC) of copper, lead, nickel and zinc based on biotic ligand models (BLMs).
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Anisotropy, multivalency and flexibility-induced effects in colloidal systems
We have studied the impact of particle shape anisotropy, multivalent interactions and flexibility on systems of micron-sized colloidal particles.
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Tangent fermions: massless fermions on a lattice
In some condensed matter systems, such as the surface of a 3D topological insulator, the electrons are effectively massless and we must necessarily use the massless Dirac equation to describe them.
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Modelling the interactions of advanced micro- and nanoparticles with novel entities
Novel entities may pose risks to humans and the environment. The small particle size and relatively large surface area of micro- and nanoparticles (MNPs) make them capable of adsorbing other novel entities, leading to the formation of aggregated contamination.
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Low-temperature spectroscopic studies of single molecules in 3-D and on 2-D hosts
Spectroscopic studies on fluorescent single molecules in organic condensed matter does not only provide information about the molecule itself, but also its near environment. By suppression of phonon-induced broadening of spectral lines through cooling to low temperatures, small changes in the spectral…
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Luminescence and applications of lanthanoid coordination polymers
Promotor: E. Bouwman, Co-Promotor: S. Bonnet
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Motivic invariants of character stacks
This thesis studies the geometry of representation varieties and character stacks. These are spaces parametrizing the representations of a finitely generated group, typically the fundamental group of a compact manifold, into an algebraic group G.
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On the geometry of fracture and frustration
Promotor: Prof.dr. M.L. van Hecke, Co-Promotor: V. Vitelli
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The electrode-electrolyte interface in CO2 reduction and H2 evolution: a multiscale approach
Electrocatalysis allows for storing electricity or converting it into chemical bonds, producing chemical building blocks and fuels using renewable resources.
- Agenda
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How to make green hydrogen
Lezing, Tuesday Talks: Science Insights
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Drie keer is scheepsrecht: ERC Advanced Grant voor Marc Koper
Electrochemicus Marc Koper ontvangt een ERC Advanced Grant van 2,5 miljoen euro voor onderzoek naar chemische reacties aangejaagd door elektrodes en stroom. Hij hoopt dat nieuwe inzichten de studieboeken halen en gaan helpen bij het ontwerpen van groene processen, zoals het maken van brandstof uit b…
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Marc Koper over de energietransitie, samenwerken en hippe elektrochemie
Wat ooit een saai en stoffig onderdeel van de chemie was, is tegenwoordig hip en booming: de elektrochemie. Met hulp van elektrochemie pakken chemici grote milieuvraagstukken aan. Marc Koper, hoogleraar Katalyse en oppervlaktechemie, is expert op dit gebied. Dit voorjaar ontving hij voor zijn werk de…
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Twee cum laude promoties voor opslaan duurzame energie
Zowel Leon Jacobse als Thom Hersbach uit de onderzoeksgroep van Marc Koper zijn cum laude gepromoveerd. Ze onderzochten allebei veranderingen aan het oppervlak van een platina-elektrode. Jacobse deed dat bij een positieve spanning, Hersbach bij een negatieve. Platina heeft de potentie om duurzaam opgewekte…
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Elektrochemie voor duurzame energie
Stel je voor: we kunnen met duurzame energie het broeikasgas CO2 omzetten in synthetische brandstoffen. Dan verminderen we én de hoeveelheid CO2, én we hebben een nieuwe manier om bijvoorbeeld wind- en zonne-energie op te slaan. Chemicus Akansha Goyal (Universiteit Leiden) doet fundamenteel onderzoek…