The Disputation will be live streamed for everyone else.
The livestream will be activated 15 minutes before the Defense starts.
Trial lecture
October 18th, 10:15 AM, Auditorium 3, Chemistry building
Trial lecture title: "Role of plasma in heterogeneous catalysis"
The trial lecture will be live streamed for everyone else.
The livestream will be activated 15 minutes before the trial lecture starts.
Kreeringssammendrag/Conferral summary
I denne avhandlingen har manglende linker-defekter I metallorganisk rammeverk (MOFer) blitt nøye karakterisert og mekanismen for CO2 hydrogenering til metanol over platina-inneholdende metallorganisk rammeverk har blitt undersøkt. Omgjøring av CO2 til metanol er en svært viktig reaksjon for å motvirke effektene av global oppvarming. Dette arbeidet har gjort det mulig å beregne manglende linker-defekter i utallige MOFer og har gitt innsikt i sammenhengen mellom katalysatorens egenskaper og ytelse.
Main research findings
The primary research goal of this thesis was to gain fundamental insight into the mechanism of CO2 hydrogenation and to develop more efficient platinum-containing metal-organic frameworks (MOFs) for CO2 hydrogenation. MOFs are a group of highly crystalline organic and inorganic materials that are heavily investigated for their use as catalysts due to their high surface area and easy tunability. Specifically, the conversion of CO2 to valuable products is important due to the effects of climate change. In this work, a novel pyrolysis pretreatment of Zr-UiO-67, an archetypical MOF first developed at the University of Oslo, was applied to tune the size of incorporated platinum nanoparticles (Pt NPs). It was found that methanol was preferably formed as opposed to methane over small Pt NPs, and conversely, methane was the preferred product over large Pt NPs. To further increase the conversion of CO2, Hf-UiO-67 was incorporated with Pt NPs. It was found that the formation rate of methanol per mol of Pt was larger for Hf-UiO-67, likely due to more active sites. Finally, a novel and universal approach to calculating missing linker defects has been developed and tested using Zr-MOFs to compare the investigated materials accurately.
Candidate contact information
LinkedIn: https://www.linkedin.com/in/dag-kristian-sannes-9aa376307/
E-post: d.sannes@profmof.com
Tel.: 91717083
Adjudication committee
Professor Norbert Stock
Institute of Inorganic Chemistry, Christian-Albrechts-Universität zu Kiel, Germany
Professor Louise Olsson
Chalmers Tekniska Högskola, Sweden
Professor Truls Norby
Department of Chemistry, University of Oslo, Norway
Supervisors
Professor Unni Olsbye
Department of Chemistry, University of Oslo, Norway
Researcher Sigurd Øien-Ødegaard
Node Pharma
Postdoctoral fellow Ainara Nova
Department of Chemistry, University of Oslo, Norway
Chair of defence
Professor Harald Walderhaug
Department of Chemistry, University of Oslo, Norway