A5013183693- Conducting polymers and applications
- Advanced battery technologies research
- CO2 Reduction Techniques and Catalysts
- Electrochemical Analysis and Applications
- Electrocatalysts for Energy Conversion
- Organic Electronics and Photovoltaics
- Electrochemical sensors and biosensors
- Ionic liquids properties and applications
- Photosynthetic Processes and Mechanisms
- Advanced Battery Materials and Technologies
- Micro and Nano Robotics
- Quantum Dots Synthesis And Properties
- Modular Robots and Swarm Intelligence
- Advanced Photocatalysis Techniques
- Fuel Cells and Related Materials
- Carbon Dioxide Capture Technologies
- Copper-based nanomaterials and applications
- Molecular Junctions and Nanostructures
- Advancements in Battery Materials
- Innovative Microfluidic and Catalytic Techniques Innovation
- Organic Light-Emitting Diodes Research
- nanoparticles nucleation surface interactions
- Electronic and Structural Properties of Oxides
- Luminescence and Fluorescent Materials
- Biosensors and Analytical Detection
Johannes Kepler University of Linz
2018-2025
University of Cambridge
2019
Abstract A precious‐metal‐ and Cd‐free photocatalyst system for efficient H 2 evolution from aqueous protons with a performance comparable to Cd‐based quantum dots is presented. Rod‐shaped ZnSe nanocrystals (nanorods, NRs) Ni(BF 4 ) co‐catalyst suspended in ascorbic acid evolve an activity up 54±2 mmol g −1 h yield of 50±4 % ( λ =400 nm) under visible light illumination (AM 1.5G, 100 mW cm −2 , >400 nm). Under simulated full‐spectrum solar irradiation ), 149±22 generated. Significant...
In this report, we present results on the electrocatalytic activity of conducting polymers [polyaniline (PANI) and polypyrrole (PPy)] toward electrochemical oxygen reduction reaction (ORR) to hydrogen peroxide (H2O2). The electropolymerization electrolysis conditions were optimized for H2O2 production. On flat glassy carbon (GC) electrodes, faradaic efficiency (FE) production was significantly improved by polymers. Rotating disc electrode (RDE) studies revealed that is mainly a result...
A detailed voltage loss analysis of organic solar cells based on the record breaking material combination D18:Y6 and their fullerene-based counterparts (D18:PC70BM) cast light superior performance state-of-the-art non-fullerene acceptors.
Anthraquinone (AQ) has long been identified as a highly promising lead structure for various applications in organic electronics. Considering the enormous number of possible substitution patterns AQ structure, with only minority being commercially available, systematic experimental screening associated electrochemical potentials represents challenging and time consuming task, which can be greatly enhanced
We report reversible electrochemical capture and release of carbon dioxide using the well-known dye precursor industrial catalyst anthraquinone.
Compound materials, such as transition-metal (TM) carbides, are anticipated to be effective electrocatalysts for the carbon dioxide reduction reaction (CO2RR) useful chemicals. This expectation is nurtured by density functional theory (DFT) predictions of a break key adsorption energy scaling relations that limit CO2RR at parent TMs. Here, we evaluate these prospects hexagonal Mo2C in aqueous electrolytes multimethod experiment and approach. We find surface oxide formation completely...
Enzyme immobilization is regarded as a key factor for their effective utilization in various fields such biofuel production, wastewater treatment, and biosensors. Designing new electrodes with biocompatible support matrices essential to improve the stability bioelectrocatalysis. Modified carbon felt were prepared tested bioelectrocatalyst under mild conditions - aqueous media at room temperature basically neutral pH. Co-immobilization of dehydrogenase enzymes red (NR) dye was successfully...
Mechanically interlocking redox-active anthraquinone onto single-walled carbon nanotubes (AQ-MINT) gives a new and advanced example of noncovalent architecture for an electrochemical platform. Electrochemical studies AQ-MINT as electrode reveal enhanced stability in both aqueous organic solvents compared to physisorbed AQ-based electrodes. While maintaining the properties parent molecules, we observe stable oxygen reduction reaction hydrogen peroxide (H2O2). Using such electrodes, 7 2 μmol...
Abstract A precious‐metal‐ and Cd‐free photocatalyst system for efficient H 2 evolution from aqueous protons with a performance comparable to Cd‐based quantum dots is presented. Rod‐shaped ZnSe nanocrystals (nanorods, NRs) Ni(BF 4 ) co‐catalyst suspended in ascorbic acid evolve an activity up 54±2 mmol g −1 h yield of 50±4 % ( λ =400 nm) under visible light illumination (AM 1.5G, 100 mW cm −2 , >400 nm). Under simulated full‐spectrum solar irradiation ), 149±22 generated. Significant...
The ordering effects in anthraquinone (AQ) stacking forced by thin-film application and its influence on dimer solubility current collector adhesion are investigated. structural characteristics of AQ chemical environment found to have a substantial electrochemical performance. Computational investigation for different charged states carbon substrate obtained via basin hopping global minimization provides important insights into the physicochemical properties. results reveal ideal...
Electrochemical capture of carbon dioxide (CO
Abstract In this work, the preparation of conducting polymer‐based composites using a biological anionic polymer based on salmon deoxyribonucleic acid (DNA) is presented. The most commonly used polymers poly(3,4‐ethylenedioxythiophene) (PEDOT), as well polypyrrole, are polymerized in presence DNA. Since conjugated polycationic state their electrically form, role counterion now fulfilled by low cost biomolecule DNA an alternative material, which also polyanion thanks to its phosphate chain....
Abstract This work reports a reversible braking system for micromotors that can be controlled by small temperature changes (≈5 °C). To achieve this, gated‐mesoporous organosilica microparticles are internally loaded with metal catalysts (to form the motor) and exterior (partially) grafted thermosensitive bottle‐brush polyphosphazenes to Janus particles. When placed in an aqueous solution of H 2 O (the fuel), rapid forward propulsion motors ensues due decomposition fuel. Conformational...
A group of industrial vat orange dyes i.e. 1, 3 and 9 are investigated for their suitability as semiconductors in organic field effect transistors.
When studying electrochemical oxygen reduction reactions in homogeneous media, special attention must be given to the significant background activity present with conventional electrode materials. The intrinsic electrocatalytic of different materials can investigated using complementary methods, such as rotating ring-disc (RRDE) technique and chronoamperometric electrolysis product quantification. This report presents a detailed investigation ability hydroxy anthraquinone derivatives...
In this contribution, we show CH3NH3PbI3–xClx perovskite solar cells (PSCs) processed in ambient air from a solution containing the diketone, acetylacetone (AA) solvent as an additive. PSCs with AA additive enhanced photovoltaic properties. The optimized PSC 10 vol % shows average open-circuit voltage (VOC) of about 1.02 V, short-circuit current density (Jsc) around 18.7 mA/cm2, fill factor 76%, and power conversion efficiency 14.5%. Atomic force microscopy topographic imaging depicts that...
Abstract In this work 3,4,9,10‐perylenetetracarboxylic diimide (PTCDI) is investigated as electrode material for organic Na‐ion batteries. Since PTCDI a widely used industrial pigment, it may turn out to be cost‐effective, abundant, and environmentally benign cathode secondary Among other carbonyl pigments, especially interesting due its high Na‐storage capacity in combination with remarkable rate capabilities. The detailed analysis of cyclic voltammetry measurements reveals diffusion‐less...
N , ′-Substituted quinacridones are a novel class of commercially available for organic electronics which reported here.
Abstract The majority of energy storage devices like batteries, fuel cells or electrolyzers require heterogeneous electrodes. Immobilization redox‐active organic molecules by a polymeric approach seems to be promising route towards electrodes for electrocatalytic in batteries. Although numerous reports on synthesis and application new poly‐anthraquinones exist, universal guideline tool selection the best polymer, concerning several applications, is still underdeveloped. Moving into direction...
A series of novel soluble nature-inspired flavin derivatives substituted with short butyl and bulky ethyl-adamantyl alkyl groups was prepared via simple straightforward synthetic approach moderate to good yields. The comprehensive characterization the materials, assess their application potential, has demonstrated that modification conjugated core enables delicate tuning absorption emission properties, optical bandgap, frontier molecular orbital energies, melting points, thermal stability....
Moritz F. Kuehnel opened a discussion of the paper by Andrew I. Cooper: What do you know about HOMO and LUMO localisation on polymers? I suppose this is strongly affected introducing heteroatoms such as sulfur, that causes changes observed when oxidising thiophene to
The state-of-the-art procedure for investigating homogenous and heterogeneous electrocatalysts is cyclic voltammetry (CV). However, this technique usually requires an inactive electrode material. One common problem arising e. g. in studying the oxygen reduction reaction (ORR) significant background contribution to overall ORR current provided by many carbon-based metal-based materials. Furthermore, rotating ring-disc electrodes (RRDEs) made of materials like glassy carbon/platinum (GC/Pt)...
Abstract Surface‐enhanced Raman scattering (SERS) is a sensitive and fast technique for sensing applications such as chemical trace analysis. However, successful, high‐throughput practical implementation necessitates the availability of simple‐to‐use economical SERS substrates. In this work, we present robust, reproducible, flexible yet cost‐effective substrate suited detection analytes at near‐infrared (NIR) excitation wavelengths. The fabrication based on simple dropcast deposition silver...
Abstract Homogeneous, aqueous solutions of the natural compound riboflavin were investigated for their electrocatalytic oxygen to hydrogen peroxide (H 2 O ) reduction performance using cyclic voltammetry and electrolysis. In addition pH dependencies, interestingly choice carbon‐based electrode material had a strong impact on performance. Therefore, three materials, glassy carbon, carbon paper (CP), felt electrochemically compared afterwards with scanning electron microscopy. Attributed...