Johannes H. Bitter
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View article: Dual-enzyme-induced polymerization for the synthesis of hyperbranched, high-molecular-weight α-glucans
Dual-enzyme-induced polymerization for the synthesis of hyperbranched, high-molecular-weight α-glucans Open
Branching enzymes increase the branching density of starch by cleaving internal α-1,4 linkages and forming new α-1,6 bonds. This effect can be further enhanced by the addition of 4-α-glucanotransferase (4αGT). For the incubations consistin…
View article: The gelation properties of rapeseed proteins are barely affected by co-extracted phenolic compounds
The gelation properties of rapeseed proteins are barely affected by co-extracted phenolic compounds Open
Rapeseed proteins are a promising alternative to animal-based proteins that can form gels to provide structure in foods. However, in the case of plant proteins, co-extracted impurities, such as phenolic compounds, may interfere with the pr…
View article: Activity Descriptors of Mo2C-based Catalysts for C-OH Bond Activation
Activity Descriptors of Mo2C-based Catalysts for C-OH Bond Activation Open
Deriving structure-activity relationships is crucial for designing efficient catalysts. To aid in this quest, data-driven methods such as machine learning (ML) are emerging. In this work, we incorporate ML tools with accurate density funct…
View article: On the performance of branching enzymes on chemically modified starches
On the performance of branching enzymes on chemically modified starches Open
Branching enzymes (BEs; EC 2.4.1.18) catalyze transglycosylation reactions that create branches in native starch and glycogen. While BEs' activity have been extensively studied on native starches, to date their activity on chemically modif…
View article: Rationalizing Catalytic Performances of Mo/W‐(Oxy)Carbides for Hydrodeoxygenation Reaction
Rationalizing Catalytic Performances of Mo/W‐(Oxy)Carbides for Hydrodeoxygenation Reaction Open
Hydrodeoxygenation (HDO) reactions are among the most important reactions for the valorization of biomass to value‐added chemicals. Transition metal carbides (TMCs) are promising alternative HDO catalysts to platinum group metals. However,…
View article: On the synergy between Ru and K2CO3 supported on carbon nanofibers for the direct air capture and conversion of CO2
On the synergy between Ru and K2CO3 supported on carbon nanofibers for the direct air capture and conversion of CO2 Open
Dual functional materials for CO2 capture (DFMs) combine a CO2 sorbent and hydrogenation catalyst on the same support material. Here, we present a DFM specifically designed for direct air capture of CO2 and subsequent conversion of the cap…
View article: Asymmetric Cu0/Cu+ Interfaces for Efficient Electrochemical Nitrate Reduction to Ammonia Under Neutral and Ultralow Concentration
Asymmetric Cu0/Cu+ Interfaces for Efficient Electrochemical Nitrate Reduction to Ammonia Under Neutral and Ultralow Concentration Open
The electrocatalytic conversion of nitrate to ammonia in neutral media offers profound potential for sustainable nitrogen management, albeit it has been critically impeded by persistent hurdles such as the sluggish kinetics and competitive…
View article: Tailoring the proximity of iron and manganese atomic sites for efficient CO <sub>2</sub> electroreduction reaction
Tailoring the proximity of iron and manganese atomic sites for efficient CO <sub>2</sub> electroreduction reaction Open
Electrochemical carbon dioxide reduction reaction (CO2RR) into high-value added chemicals and fuels has aroused wide attention, but suffers from high overpotential and poor selectivity. Herein, nitrogen-doped carbon supported Fe and Mn het…
View article: Medium-dependent regioselectivity of electrochemical bromination of methyl levulinate
Medium-dependent regioselectivity of electrochemical bromination of methyl levulinate Open
The method for electrochemical bromination of methyl levulinate using ammonium bromide is reported. In MeCN : H 2 O mixture, it proceeded via enol intermediate favoring C-3 bromination, and in MeOH – via enol ether favoring C-5 bromination.
View article: Rationalizing Catalytic Performances of Mo/W-(Oxy)Carbides for Hydrodeoxygenation
Rationalizing Catalytic Performances of Mo/W-(Oxy)Carbides for Hydrodeoxygenation Open
Hydrodeoxygenation (HDO) reactions are among the most important reactions for the valorization of biomass to value-added chemicals. Transition metal carbides (TMCs) are promising alternative HDO catalysts to platinum group metals. However,…
View article: Electrochemical and Non-Electrochemical Pathways in the Electrocatalytic Oxidation of Monosaccharides and Related Sugar Alcohols into Valuable Products
Electrochemical and Non-Electrochemical Pathways in the Electrocatalytic Oxidation of Monosaccharides and Related Sugar Alcohols into Valuable Products Open
In this contribution, we review the electrochemical upgrading of saccharides (e.g., glucose) and sugar alcohols (e.g., glycerol) on metal and metal-oxide electrodes by drawing conclusions on common trends and differences between these two …
View article: Electrochemical Formation and Removal of Homogeneous Cu Catalysts
Electrochemical Formation and Removal of Homogeneous Cu Catalysts Open
Transition metal ions and their complexes play a crucial role in homogeneous catalysis. These catalysts are pivotal for the production of, for example, fine chemicals and pharmaceuticals. Nevertheless, because of the homogeneous nature of …
View article: Encapsulation of cannabidiol in hemp seed oleosomes
Encapsulation of cannabidiol in hemp seed oleosomes Open
Oleosomes are natural lipid droplets that can be extracted intact from oil seeds, forming oil/water emulsions. Their lipid cores, surrounded by a monolayer of phospholipids and proteins, make oleosomes suitable as carriers of hydrophobic b…
View article: Mixed Matrix Pt‐Carbon Nanofiber Polyethersulfone Catalytic Membranes for Glucose Dehydrogenation
Mixed Matrix Pt‐Carbon Nanofiber Polyethersulfone Catalytic Membranes for Glucose Dehydrogenation Open
The advancement of technologies for producing chemicals and materials from non‐fossil resources is of critical importance. An illustrative example is the dehydrogenation of glucose, to yield gluconic acid, a specialty chemical. In this stu…
View article: Integration of biocompatible hydrogen evolution catalyst developed from metal-mix solutions with microbial electrosynthesis
Integration of biocompatible hydrogen evolution catalyst developed from metal-mix solutions with microbial electrosynthesis Open
Microbial conversion of CO2 to multi-carbon compounds such as acetate and butyrate is a promising valorisation technique. For those reactions, the electrochemical supply of hydrogen to the biocatalyst is a viable approach. Earlier we have …
View article: Rim‐Based Binding of Perfluorinated Acids to Pillararenes Purifies Water
Rim‐Based Binding of Perfluorinated Acids to Pillararenes Purifies Water Open
Per‐ and polyfluoroalkyl substances (PFAS) pose a rapidly increasing global problem as their widespread use and high stability lead worldwide to water contamination, with significant detrimental health effects. [1] Supramolecular chemistry…
View article: Rim‐Based Binding of Perfluorinated Acids to Pillararenes Purifies Water
Rim‐Based Binding of Perfluorinated Acids to Pillararenes Purifies Water Open
Per‐ and polyfluoroalkyl substances (PFAS) pose a rapidly increasing global problem as their widespread use and high stability lead worldwide to water contamination, with significant detrimental health effects. [1] Supramolecular chemistry…
View article: Presence of digestible starch impacts <i>in vitro</i> fermentation of resistant starch
Presence of digestible starch impacts <i>in vitro</i> fermentation of resistant starch Open
Awareness is required for the presence of digestible starch when studying in vitro fermentation of resistant starch (RS). Such starch may steer and overrule the fermentation of RS, thereby affecting the evaluation of the prebiotic potentia…
View article: Toward the Rational Design of More Efficient Mo<sub>2</sub>C Catalysts for Hydrodeoxygenation–Mechanism and Descriptor Identification
Toward the Rational Design of More Efficient Mo<sub>2</sub>C Catalysts for Hydrodeoxygenation–Mechanism and Descriptor Identification Open
Viable alternatives to scarce and expensive noble-metal-based catalysts are transition-metal carbides such as Mo and W carbides. It has been shown that these are active and selective catalysts in the hydrodeoxygenation of renewable lipid-b…