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…

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.

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.

This thesis describes the use of a combined approach of computational and experimental techniques to gain novel insights to understand the glycosylation reaction and its reactive intermediates.

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.

Heterogeneous catalysis is essential to many industrial applications. These catalysts are often comprised of supported nanoparticles, which contain various different surface sites.

Carbohydrates, or sugars, are the most diverse and most abundant biomolecules known. However, the isolation of carbohydrate samples in sufficient amounts and purity is often impractical or even impossible, so the chemical synthesis of glycosides becomes relevant. The glycosylation reaction, in which…

Human civilization consumes a huge amount of fossil fuels, which has resulted in an atmospheric CO2 level which has not been higher in over 800 millennia.

Promotor: T.J. Aartsma, Co-promotor: R.N. Frese

The glycosylation reaction is a pivotal reaction in creating new and complex oligosaccharides.

In this dissertation, the synthesis and characterization of a series of iron complexes based on different ligand platforms are described.

Promotor: Prof.dr. E. Bouwman

Heterogeneous catalyzed processes are highly significant to the chemical industry. Dissociative chemisorption (DC) of molecules on surfaces is always considered as a step with a high degree of rate control for heterogeneous catalysis.

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

The research presented in this thesis makes use of small molecules (as H2 , D2 and O2 ) on well-defined single crystal surfaces (flat Pt(111), flat Cu(211) and curved Pt(111)) to elucidate the role of surface structure and degrees of freedom in the reactant in specific surface reactions.

Promotor: A. Doelman, Co-promotor: J.D.M. Rademacher

A difficulty of studies on chemical kinetics are the reaction time scales and detection of their intermediates.

Hetterscheid

Promotores: G.W. Canters, T.J. Aartsma

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

Promotor: Arjen Doelman, Co-promotor: Vivi Rottschäfer

Promotor: Prof.dr. E. Bouwman, Co-promotor: S. Bonnet

Development of GHG calculator for bio-electricity and heat.

Juurlink

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

Koper Bouwman Bonnet Hetterscheid

In this thesis chemical and physical processes in the ice mantles on interstellar dust grains are studied.

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…

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

Juurlink

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

Promotor: Prof.dr. G.J. Kroes

Several techniques are explored for going beyond the born-oppenheimer static surface model for molecule-surface reactions.

In this dissertation iron-based homogeneous catalysts were synthesized, characterized and investigated for water oxidation activity.

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen

Catalysis is of extreme relevance in the production of everyday materials and plays a central role in many aspects of our life.

Kieltyka

Met ingang van 2026 zet de universiteit extra in op directe CO2-reductie. Dit is mogelijk door het stoppen met de inkoop van compensatiecertificaten. In plaats hiervan investeert de universiteit meer in energiebesparing.

Artificial photosynthesis has recognised potential to produce green and sustainable fuels from earth-abundant resources such as water, carbon dioxide (CO2), and sunlight.

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…

In this thesis we have discussed several parameters that affect the electrochemical conversion of enviromentaly harmful molecules such as nitrates and carbon dioxide to more valuable and less deleterious compounds, in order to cast light onto the mechanism of the reaction to achieve an efficient and…

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.

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…

Productie van duurzame energie is belangrijk maar het teveel aan opgewekte energie moet opgeslagen en gebruikt kunnen worden wanneer er een tekort is. Onderzoekers uit het hele land bedachten mogelijke oplossingen voor dit probleem en zeven voorstellen ontvangen financiering van Shell, FOM en NWO. Twee…

Carbon dioxide capture and utilization technologies are necessary to create a truly circular economy. The electrochemical reduction of carbon dioxide to formate is an appealing carbon utilization method as it can be performed at room temperature and pressure, it only requires two electrons, and it has…

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.

De stijging van de CO2 concentratie in de lucht neemt gestaag toe, met alle gevolgen van dien. Naast alle organisaties die zich bezig houden met het verminderen van de CO2 concentratie werkt de Universiteit Leiden op drie verschillende manieren aan het vergaren van fundamentele kennis met betrekking…

Energie winnen uit zonlicht en water: dát zou een oplossing zijn voor ons grootste milieuprobleem. Elektrochemicus Marc Koper onderzoekt de basis voor een CO2-neutrale toekomst. Over zijn werk staat nu een dossier online.

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.

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.