Fabian Kubannek
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View article: Enhanced Performance of Laser‐Structured Copper Electrodes Towards Electrocatalytic Hydrogenation of Furfural
Enhanced Performance of Laser‐Structured Copper Electrodes Towards Electrocatalytic Hydrogenation of Furfural Open
Electrocatalytic hydrogenation (ECH) of biomass derived compounds is an emerging technology for the production of biofuels. Herein, the ECH of furfural was investigated systematically on femtosecond laser‐structured copper electrodes, amen…
View article: Reaction kinetics of anodic biofilms under changing substrate concentrations: Uncovering shifts in Nernst‐Monod curves via substrate pulses
Reaction kinetics of anodic biofilms under changing substrate concentrations: Uncovering shifts in Nernst‐Monod curves via substrate pulses Open
In the present study, it is shown that the concentration dependency of undefined mixed culture anodic biofilms does not follow a single kinetic curve, such as the Nernst‐Monod curve. The biofilms adapt to concentration changes, which inevi…
View article: Hybrid Process Models in Electrochemical Syntheses under Deep Uncertainty
Hybrid Process Models in Electrochemical Syntheses under Deep Uncertainty Open
Chemical process engineering and machine learning are merging rapidly, and hybrid process models have shown promising results in process analysis and process design. However, uncertainties in first-principles process models have an adverse…
View article: Identifying the oxygen evolution mechanism by microkinetic modelling of cyclic voltammograms
Identifying the oxygen evolution mechanism by microkinetic modelling of cyclic voltammograms Open
Electrocatalytic water splitting is currently one of the most promising reactions to produce "green" hydrogen in a decarbonized energy system. Its bottleneck reaction, the oxygen evolution reaction (OER), is catalysed by hydrous iridium, a…
View article: Studying the Interaction of Mass Transport and Electrochemical Reaction Kinetics by Species Frequency Response Analysis
Studying the Interaction of Mass Transport and Electrochemical Reaction Kinetics by Species Frequency Response Analysis Open
Electrochemical macrokinetics contains the interaction of electrode reactions with transport phenomena. To disentangle the individual processes, dynamic techniques such as electrochemical impedance spectroscopy are widely used. Additional …
View article: Origin of the Drastic Current Decay during Potentiostatic Alkaline Methanol Oxidation
Origin of the Drastic Current Decay during Potentiostatic Alkaline Methanol Oxidation Open
The current production from the alkaline methanol electro-oxidation reaction does not reach a steady state on a smooth platinum catalyst under potentiostatic conditions. We investigated two possible explanations for this phenomenon: change…
View article: Online Analysis of CO2 Production in Electroactive Biofilms by Differential Electrochemical Mass Spectrometry
Online Analysis of CO2 Production in Electroactive Biofilms by Differential Electrochemical Mass Spectrometry Open
<p>Electroactive biofilms are routinely characterized in-operando by dynamic electrochemical measurement techniques such as cyclic voltammetry or electrochemical impedance spectroscopy. Since electrical signals can be recorded and pr…
View article: Performance Modelling of the Bioelectrochemical Glycerol Oxidation by a Co‐Culture of <i>Geobacter Sulfurreducens</i> and <i>Raoultella Electrica</i>
Performance Modelling of the Bioelectrochemical Glycerol Oxidation by a Co‐Culture of <i>Geobacter Sulfurreducens</i> and <i>Raoultella Electrica</i> Open
An effectively operating microbial electrolysis cell requires an inexpensive electron donor in combination with a defined and stable electron‐transferring microbial community. Here, a defined co‐culture of Raoultella electrica and Geobacte…
View article: The Key Role of Water Activity for the Operating Behavior and Dynamics of Oxygen Depolarized Cathodes
The Key Role of Water Activity for the Operating Behavior and Dynamics of Oxygen Depolarized Cathodes Open
Advanced chlor‐alkali electrolysis with oxygen depolarized cathodes (ODC) requires 30 % less electrical energy than conventional hydrogen‐evolution‐based technology. Herein, we confirm that the activities of hydroxide and water govern the …
View article: Modeling Oxygen Gas Diffusion Electrodes for Various Technical Applications
Modeling Oxygen Gas Diffusion Electrodes for Various Technical Applications Open
In gas diffusion electrodes (GDEs), electrocatalysts are in contact with gas and electrolyte ensuring a large active three‐phase boundary. GDEs are used for important technical applications in energy transformation and chemical synthesis. …
View article: Processes and Their Limitations in Oxygen Depolarized Cathodes: A Dynamic Model‐Based Analysis
Processes and Their Limitations in Oxygen Depolarized Cathodes: A Dynamic Model‐Based Analysis Open
Oxygen depolarized cathodes (ODCs) are key components of alkaline fuel cells and metal–air batteries or of chlor‐alkaline electrolysis, but suffer from limited oxygen availability at the reaction zone. Dynamic analysis is a highly suitable…
View article: Concentration Pulse Method for the Investigation of Transformation Pathways in a Glycerol-Fed Bioelectrochemical System
Concentration Pulse Method for the Investigation of Transformation Pathways in a Glycerol-Fed Bioelectrochemical System Open
We investigated transformation pathways and determined rate constants in a continuously operated glycerol-fed bioelectrochemical system under chemostatic conditions by applying concentration pulses of various intermediates. Our methodology…
View article: Kinetics and rate limitations in a glycerol‐fed microbial fuel cell
Kinetics and rate limitations in a glycerol‐fed microbial fuel cell Open
process aims at comprehensively optimizing processes from a technical, economical as well as environmental perspective while taking advantage of the high level of flexibility regarding process design in early process development phases.As …