Currently the following calls for literature studies are open. If you are interested please directly contact the indicated supervisor(s).
Supervisor(s): Iris ten Have
Title: The role of titania support in CO/CO2 hydrogenation reactions
Project description: Heterogeneous catalysts generally consist of active metal (oxide) nanoparticles affixed to a high-surface-area support. The support material can either be reducible, such as titania, or non-reducible, such as silica. Silica is one of the most widely used supports in industry and interacts very little with the active phase. Titania on the other hand interacts in many cases with the supported active phase. This behaviour determines the unique catalytic properties of the latter. In CO/CO2 hydrogenation reactions the catalytic activity strongly increases when titania is used as support material. However, the actual interaction that enables this increase in activity is still under debate. With this literature study we would like to obtain an overview of the potential interaction mechanisms taking place between titania and the active phase in titania-supported catalysts for CO/CO2hydrogenation reactions.
Supervisor(s): Iris ten Have
Title: The role of waxes as plastic additives in degradation and recycling
Project description: The consumption of plastics in our society has grown increasingly over the years, creating significant disposal problems. At first there was a trend to making these materials more resistant to e.g. mechanical stress and the action of heat or light. However, in the 70’s a need began to be recognized to render plastics also degradable and recyclable. Recently, it has been shown that polyolefins, such as polyethylene and polypropylene, can be fully degraded and reused as liquid fuels and waxes. Additives to plastics play an important role in the materials degradability. For example, oxidized waxes improve the polarity of polyolefins and they serve as photoactivator, thereby assisting in a more facile degradation process. With this literature study we would like to delve deeper into the role of waxes as plastic additives in degradation and recycling.
Supervisor(s): Nina Genz
Title: Synchrotron-based techniques for characterizing supported bimetallic catalysts
Project description: This literature study focuses on synchrotron-based techniques, e.g. X-ray absorption spectroscopy and X-ray scattering. The advantages and challenges of these techniques in regard to supported bimetallic catalysts should be elaborated. As improved catalytic performance of supported bimetallic catalysts is usually attributed to alloy formation, it is important to gain a fundamental understanding of the structure, composition, and evolution of these systems. Hereby, synchrotron-based techniques can offer a great opportunity.
Supervisor(s): Longfei Wu and Ward van der Stam
Title:Emerging Operando X-ray Techniques Towards Understanding Heterogeneous Electrochemical CO2 Reduction
Project description: While extensive efforts have been devoted to the optimization of CO2 reduction catalysts, the underlying structure-performance relationship remains yet to be understood. X-ray based techniques, especially with the recent advances in synchrotron radiation sources, are increasingly applicable in heterogeneous catalysts which provide elemental, structural (ranges from angstroms to micrometers) and real-time probing capabilities. The objective of this literature study is to provide an overview of the emerging X-ray techniques including but not limited to X-ray absorption, diffraction and scattering that are applied in operando electrochemistry.