169 search results for “oxygen” in the Public website
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Selectivity and competition between the anodic evolution of oxygen and chlorine
Sustainable energy from wind and solar is most readily available near the sea.
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Catalysis of the electrochemical water oxidation to oxygen
Promotor: M.T.M. Koper, Co-Promotor: F. Calle-Vallejo
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The heart of oxygenic photosynthesis illuminated
Promotor: H.J.M. de Groot, Co-Promotor: A. Alia
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Heterogenized molecular (pre)catalysts for water oxidation and oxygen reduction
Before the large scale use of renewable energy sources can be implemented in our society, the storage of electrical energy needs to be tackled. Storage the energy as hydrogen via the reduction of protons is a good option.
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Interaction of oxygen and carbon monoxide with Pt(111) at intermediate pressure and temperature: revisiting the fruit fly of surface science
Promotor: M.T.M. Koper, Co-promotors: A.I. Yanson, L.B.F. Juurlink
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Biomimetic Copper Catalysts for the Electrochemical Oxygen Reduction Reaction
PhD Defence
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Iron complexes as electrocatalysts for the water oxidation reaction
In this dissertation, the synthesis and characterization of a series of iron complexes based on different ligand platforms are described.
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Fast Oxygen Reduction Catalyzed by a Copper(II) Tris(2‐pyridylmethyl)amine Complex through a Stepwise Mechanism
The mechanism of the electrochemical reduction of dioxygen by a mononuclear pyridylalkylamine copper complex was investigated (see picture). It was shown that in neutral aqueous solution dioxygen undergoes stepwise reduction, wherein hydrogen peroxide plays a key role. The rate constants determined…
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Catalysts contribute their own oxygen for reactions
A catalyst: normally a substance that speeds up a chemical reaction, without adding molecules to this reaction. Scientists from the group of Prof. Marc Koper of Leiden University and Prof. Yang Shao-Horn of MIT now discovered that in specific reactions that need oxygen, catalysts called metal oxides…
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We finally understand how oxygen reacts on platinum
Platinum is a widely used catalyst, but its precise mechanism largely remains a mystery to scientists. Ludo Juurlink has now demonstrated for the first time how oxygen reacts on the platinum surface. Together with PhD students Kun Cao and Richard van Lent and international colleagues he publishes his…
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Jan VosWiskunde en Natuurwetenschappen
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Richard van LentWiskunde en Natuurwetenschappen
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Steps in gas-surface reactions
Heterogeneous catalysis is essential to many industrial applications. These catalysts are often comprised of supported nanoparticles, which contain various different surface sites.
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Cluster headache and oxygen
PhD Defence
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Oxygen line opens new perspective on the far universe
A team of astronomers of Leiden University and the University of Texas (Austin, United States) has discovered a new way to map distant galaxies. They did so by observing the fingerprint of oxygen in a distant galaxy, something that is usually not possible from Earth. The researchers will publish their…
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Enzymatic reduction of oxygen by small laccase
PhD Defence
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Newton-telescope finds missing intergalactic material
Astronomers from, among others, SRON and Leiden Observatory have discovered long-sought intergalactic gas with ESA’s space telescope XMM-Newton. This gas is one of the pieces of the puzzle to map the total amount of ‘normal’ matter in the universe. The research will be published in Nature on 21 June…
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The Effects of Oxygen in Critical Illness
PhD Defence
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Selectivity and competition between the anodic evolution of oxygen and chlorine
PhD Defence
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Oxygen titration and compliance in oxygen saturation targeting in preterm infants in the neonatal intensive care unit
PhD Defence
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Chemical Biology lecture: Chemistry of Oxygen Sensing in Humans and Other Animals
Lecture
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Heterogenized molecular (pre)catalysts for water oxidation and oxygen reduction
PhD Defence
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FRESH Lecture - Synergistic 'Substrate Activation' and 'Oxygen Activation' in Salicylate Dioxygenase from QM/MM Simulations
Lecture
- Oxygen chemisorption on flat and stepped Pt surfaces probed by an alignment-controlled O2 beam
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Fighting tumours with light
Chemotherapy that does nothing until you irradiate it with light. Sylvestre Bonnet receives a Vici grant of 1.5 million euros for the development of this treatment. The Leiden chemist wants to build a new molecule to fight tumours that are at the time still difficult to treat.
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Linking simple molecules to grain evolution across planet-forming disks
Planets are formed in disks of gas and dust around young stars.
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Operando research in electrochemistry
The central theme of Rik Mom’s research group is to identify what the electrode-electrolyte interface looks like when electrocatalysis is taking place. Using specialized forms of Raman and X-ray spectroscopy, we study the chemical state and bonding environment of the electrode surface and near-surface…
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Surface-structure dependencies in catalytic reactions
Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink
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Unraveling the mechanism of multicopper oxidases: from ensemble to single molecule
Promotores: Prof.dr. G.W. Canters, Prof.dr. T.J. Aartsma
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New insight brings sustainable hydrogen one step closer
Leiden chemists Marc Koper and Ian McCrum have discovered that the degree to which a metal binds to the oxygen atom of water is decisive for how well the chemical conversion of water to molecular hydrogen takes place. This insight helps to develop better catalysts for the production of sustainable hydrogen,…
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Chemical functionalization of the graphene surface for electrical and electrochemical sensing application
Advanced sensing techniques require graphene with high quality and well-controlled surface chemistry.
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Uncovering the ingredients for planet formation
This thesis discusses the physical and chemical processes than influence the composition of forming planets.
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PhD Theses
A full overview of CASC PhD theses.
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Electrochemical, catalytic and process engineering aspects of gas-forming electrolysis
Koper
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Signalling pathways that control development and antibiotic production in streptomyces
Bacteria are highly complex and diverse organisms that have adapted to survive in ecological niches ranging from the most extreme to the most heterogeneous environments.
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Patterns of Paleomobility in the Ancient Antilles.
Patterns of paleomobility in the Caribbean were studied through an inter-disciplinary approach using a combination of archaeological, osteological, mortuary, and isotopic data.
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PhD in physical chemistry: operando spectroscopy on IrOx and RuOx electrocatalysts
Science, Leiden Institute of Chemistry (LIC)
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Improvisations in phototrophy
Microbial rhodopsins are photosensitive pigments implemented in the growth and adaptation of a large population of microorganisms.
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Water related adsorbates on stepped platinum surfaces
Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink
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Wrap the dead
The funerary textile tradition from the Osmore Valley, South Peru, and its social-political implications (2005)
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Electrocatalysis for sustainable energy
Marc Koper’s research focuses on electrocatalysis and electrochemical surface science for sustainable energy and chemistry. Reactions of interest are the redox reactions of the oxygen/hydrogen cycle (water oxidation, hydrogen evolution), the carbon cycle (reduction of carbon dioxide, oxidation of small…
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In shape for photoregulation
How does the photoregulation mechanism work in detail?
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Energy & Sustainability
Twenty years from now, the world population is estimated to be around 8.7 billion people, compared to the current 7.3 billion. In combination with the improvements in living standards and the corresponding growth in consumption, this will result in an enormous increase in the demand for food, consumables,…
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Fungal Chitosans from Fermentation Mycelia for Plant Biostimulants (FunChi)
Our focus is to optimize the fungal cell wall to both increase chitin production and chitin extractability.
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Solvent effects in the electrocatalytic reactions of water
Koper
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Upconverting nanovesicles for the activation of ruthenium anti-cancer prodrugs with red light
Promotor: E. Bouwman, Co-promotor: S. Bonnet
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Mathematics-based strategies for repairing tumour blood vessels
How does the extracellular matrix coordinate endothelial cell behavior during angiogenesis, and how do metabolic waste-products and matrix-degrading enzymes produced by the tumour modify the extracellular matrix so as the change the cellular coordination?
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Using zebrafish to target the Achilles’ heel of cancer
Exploiting metabolic vulnerabilities to identify anticancer compounds in zebrafish synthetic lethality screens.
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Nutrition
Radiation can be used to determine the isotope ratio of a skeleton. This provides information about where our ancestors lived and what they consumed. Dr Andrea Waters has developed a revolutionary method that can trace patterns of consumption from tens of thousands of years ago.
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Vici for Sylvestre Bonnet: new light on cancer therapy
Chemotherapy that does nothing until you irradiate it with light. Sylvestre Bonnet receives a Vici grant of 1.5 million euros for the development of this treatment. The Leiden chemist wants to build a new molecule to fight tumours that are at the time still difficult to treat.