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%0 Thesis
%A Bäßler, Jonas Frederik
%T Selective methanol oxidation for paired electrolysis
%V 54
%I Rheinisch-Westfälische Technische Hochschule Aachen
%V Dissertation
%C Aachen
%M RWTH-2025-04916
%B Aachener Verfahrenstechnik series - AVT.CVT - Chemical process engineering
%P 1 Online-Ressource : Illustrationen
%D 2025
%Z Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
%Z Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2025
%X Electrochemical processes offer promising routes to defossilize the chemical industry by integrating low-carbon electricity. Industrial application is still hindered by high costs and the challenging transition from lab-scale research to industrial maturity. Key processes, such as cathodic hydrogen evolution and CO2 reduction, are typically paired with the anodic oxygen evolution reaction (OER). However, the generated oxygen holds little value, and the electrical costs associated with energy-intensive OER pose a significant economic barrier. This thesis explores selective methanol oxidation as a less energy-intensive alternative to OER for paired electrolysis, which yield value-added products from both anodic and cathodic reactions.Two paired processes were studied in electrochemical flow cells: Methanol oxidation to formaldehyde at platinum paired with CO2 reduction, and methanol oxidation to formate at hierarchically structured copper oxide paired with hydrogen evolution. Investigating both processes at conditions significantly exceeding previous studies in terms of electrode area, current density, and product concentration allowed novel insights into selective methanol oxidation and revealed crucial interactions within the paired systems. Furthermore, methanol oxidation was employed to introduce 'feed and bleed' as a versatile alternative to conventional batch and single-pass operation of electrochemical flow cells.Methanol oxidation to formaldehyde was strongly influenced by the oxidation state of the electrode with a higher Faraday efficiency for oxidized platinum (up to 58
%F PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
%9 Dissertation / PhD ThesisBook
%R 10.18154/RWTH-2025-04916
%U https://publications.rwth-aachen.de/record/1012205