Promotor: H.J.A. Röttgering, Co-promotor: M. Haverkorn

Promotor: K.E. Schalm, Co-promotor: S.S. Lee

Development of GHG calculator for bio-electricity and heat.

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

Despite the history of studies on methanol formation from CO2, the dominant elementary reaction steps that constitute the chemical mechanism for this catalyzed process are not determined.

This thesis has shed light on some of the ways in which the local electrolyte composition can differ from the bulk and how these changes in the local reaction environment can determine the activity and/or selectivity of two important electrocatalytic reactions, namely, electrochemical CO2 reduction…

Promotor: Prof.dr. H.W. Lenstra

With the energy transition toward a renewable energy supply and a CO2-neutral economy, electrification of the energy system is rising in importance, which leads to the challenge of long-term storage of renewable electricity.

Juurlink

Promotor: H.W. Lenstra

Promotor: A. Achúcarro, Co-Promotor: J.W. van Holten

Artin L-functions associated to continuous representations of the absolute Galois group G_K of a global field K capture a lot of information about G_K as well as arithmetic properties of K.

Promotor: H.W. Lenstra, Jr., Co-promotor: B. de Smit

Koper Bouwman Bonnet Hetterscheid

Promotor: V. Vitelli, Co-promotor: J. Paulose

This thesis is about cosmological inflation and its relation to observations.

Planten zou je kunnen zien als kleine chemische fabrieken, die via fotosynthese chemische stoffen produceren. Als we fotosynthese kunnen nabootsen in een kunstmatig systeem, kunnen we schone brandstoffen en materialen maken uit zonlicht en CO2. Huub de Groot is heel dicht bij het ontwerpen van zo’n…

Juurlink

This thesis focuses on the synthesis, characterization and performance towards CO2 electroreduction of mono and bi-metallic particles based on p-block metals

Promotores: T.H. Oosterkamp, N. de Jonge

Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)

Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.

Promotor: Prof.dr. P. Stevenhagen, Co-Promotor: J.H. Evertse

Learning from small data sets in machine learning is a crucial challenge, especially when dealing with data imbalances and anomaly detection. This thesis delves into the challenges and methodologies of learning from small datasets in machine learning, with a particular focus on addressing data imbalances…

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

Bicarbonate buffer is largely found in nature due to its ability to regulate pH variations around neutral values. As the pH changes, so does the speciation of the buffer.

M.T.M. Koper, Co-promotor: D.G.H. Hetterscheid

Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…

The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.

In this thesis, we consider various (electro)chemical phenomena at surfaces and nanoparticles and their underlying atomistic processes, which we studied using first-principles methods such as density functional theory.

Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

The thesis describes terrestrial field trials aimed to detect side-effects of pesticides within the framework of pesticide registration procedures. Field trials were developed using vascular plants Brassica napus and Poa annua, caterpillars Pieris brassicae and effects on decomposition were studied…

In this thesis, we show that we can use Shimura’s CM theory to explicitly compute the Hilbert class field of any primitive quartic CM field.

In this work we describe three methods to improve the performance of Quantum Field Theory calculations.

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

Promotor: S.J. Edixhoven

This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.

Natural history collections provide invaluable sources for researchers with different disciplinary backgrounds, aspiring to study the geographical distribution of flora and fauna across the globe as well as other evolutionary processes.

Promotores: S.F. Portegies Zwart, E. M. Rossi

This work describes several studies into the electroreduction of carbon dioxide (CO2RR), both regarding mechanistical aspects and catalyst stability considerations. Mechanistic insights into carbon-carbon bond formation on a silver catalyst are described in Ch 2, were we find an acetaldehyde-like surface…

Promotor: Prof.dr. M. de Jong

This thesis investigates the relations between metabolism and anatomy through the use of Magnetic Resonance Imaging (MRI).

Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia

CO2-reductie door de CO2 eenvoudig met een soort oplaadbare batterij uit de lucht te halen, lijkt pure science fiction. Toch hebben Leidse scheikundigen zo’n ‘batterij’ – een gele koperoplossing die in contact met lucht groenblauw wordt – ontdekt. Hierover publiceren ze in Science van vrijdag 15 jan…

Promotores: Prof.dr. J. Zaanen, Prof.dr. K.E. Schalm

Een Leidse ontdekking helpt om van CO2 aardgas te maken én om duurzame energie op te slaan. Onderzoek van professor Marc Koper en promovenda Jing Shen maakt duidelijk hoe dit proces goedkoop en controleerbaar kan verlopen. Nature Communications 1 september 2015.

Electrocatalysis allows for storing electricity or converting it into chemical bonds, producing chemical building blocks and fuels using renewable resources.

Promotor: S.J. Edixhoven Co-promotor: L. van Geemen, P. Parent

On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.