A5022770670- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Paleontology and Stratigraphy of Fossils
- Advanced battery technologies research
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geochemistry and Elemental Analysis
- Catalytic Processes in Materials Science
- Conducting polymers and applications
- Electrochemical Analysis and Applications
- Hydrocarbon exploration and reservoir analysis
- Concrete and Cement Materials Research
- Metal-Organic Frameworks: Synthesis and Applications
- Extraction and Separation Processes
- Geological Studies and Exploration
- Supercapacitor Materials and Fabrication
- Polyoxometalates: Synthesis and Applications
- Recycling and utilization of industrial and municipal waste in materials production
- Isotope Analysis in Ecology
- Radioactive element chemistry and processing
- Catalysis and Hydrodesulfurization Studies
- Fish Ecology and Management Studies
- Semiconductor materials and devices
- Geological formations and processes
- Marine and fisheries research
University of Tartu
2015-2024
Geological Survey of Denmark and Greenland
2024
Washington University in St. Louis
2021-2023
Tallinn University of Technology
2020-2021
Centre for Arctic Gas Hydrate, Environment and Climate
2018-2020
UiT The Arctic University of Norway
2018-2020
Transition-metal- and nitrogen-codoped carbide-derived carbon/carbon nanotube composites (M-N-CDC/CNT) have been prepared, characterized, used as cathode catalysts in anion-exchange membrane fuel cells (AEMFCs). As transition metals, cobalt, iron, a combination of both investigated. Metal nitrogen are doped through simple high-temperature pyrolysis technique with 1,10-phenanthroline the N precursor. The physicochemical characterization shows success metal doping well very similar...
A strongly oxidizing Paleoproterozoic era Two billion years ago, marine sulfate concentrations were around one-third as high modern ones, constituting an capacity equivalent to more than 20% of that the ocean-atmosphere system. Blättler et al. found this by analyzing a remarkable evaporite succession 1 older oldest comparable deposit discovered date. These quantitative results, for time when only qualitative information was previously available, provide constraint on magnitude and timing...
We study the physico-chemical properties and electrocatalytic activity towards oxygen reduction of two Fe–N–C catalysts based on carbide derived carbon.
Bauxite and bauxite residue, a by-product of alumina production, were studied using combination microanalytical techniques — electron microprobe wavelength dispersive spectrometry, laser ablation inductively coupled plasma mass spectrometry μ-Raman spectroscopy. The aim the work was to reveal modes occurrence scandium (Sc). motivation behind this effort provide mineralogical insight for support ongoing development Sc extraction technologies from residue. In analyzed bauxites is mainly hosted...
Cobalt- and nitrogen-doped carbide-derived carbon/carbon nanotube (CDC/CNT) composites are prepared used as oxygen reduction reaction (ORR) electrocatalysts for an anion exchange membrane fuel cell (AEMFC) cathode. For the doping, high-temperature pyrolysis is applied using a cobalt salt nitrogen precursor (either dicyandiamide, urea, or melamine). During (i) new mesopores formed confirmed by N2 physisorption results, (ii) atomically dispersed present on catalysts detected scanning...
In this work, doped nanocarbon electrocatalysts for electrochemical oxygen reduction reaction (ORR) are prepared by high-temperature pyrolysis from Honeyol, cobalt and iron salts, dicyandiamide. MgO-based inorganic templates further used to increase the mesoporosity of catalyst materials. The templated bimetallic electrocatalyst containing (FeCoNC-MgOAc) showed excellent stability remarkable ORR performance in rotating disk electrode testing alkaline conditions. was tested anion-exchange...
Abstract A simple synthesis method was used to prepare an active oxygen reduction reaction (ORR) electrocatalyst based on iron and nitrogen co‐doped graphene for polymer electrolyte fuel cell applications. For the of ORR catalysts, two different graphene‐based materials, commercially available (Gra) oxide (GO), were as carbon substrates. The half‐cell experiments conducted by using rotating disc electrode (RDE) revealed that Fe−N−Gra showed much higher electrocatalytic activity than Fe−N−GO...
Oncofetal fibronectin (FN-EDB) and tenascin-C C domain (TNC-C) are nearly absent in extracellular matrix of normal adult tissues but upregulated malignant tissues. Both FN-EDB TNC-C developed as targets antibody-based therapies. Here we used peptide phage biopanning to identify a novel targeting (PL1, sequence: PPRRGLIKLKTS) that interacts with both TNC-C. Systemic PL1-functionalized model nanoscale payloads [iron oxide nanoworms (NWs) metallic silver nanoparticles] homed glioblastoma (GBM)...
Iron- and nitrogen-doped carbon-based catalysts are one of the most promising alternatives to platinum-group metal-based ones currently used in fuel cell industry. Here, we study effect ball-milling conditions compositions catalyst precursors comprising a silicon carbide-derived carbon (CDC) on properties final catalysts, importantly their activity toward oxygen reduction reaction (ORR). Ball-milling rates from 100 800 rpm were investigated with 400 proving be optimum value. The...
Abstract In vivo phage display is widely used for identification of organ- or disease-specific homing peptides. However, the current in biopanning approaches fail to assess biodistribution specific peptide phages across tissues during screen, thus necessitating laborious and time-consuming post-screening validation studies on individual phages. Here, we adopted bioinformatics tools RNA sequencing analysis high-throughput (HTS) data estimate representation peptides vivo. The from screen were...
Geobiology explores how Earth's system has changed over the course of geologic history and living organisms on this planet are impacted by or indeed causing these changes. For decades, geologists, paleontologists, geochemists have generated data to investigate topics. Foundational efforts in sedimentary geochemistry utilized spreadsheets for storage analysis, suitable several thousand samples, but not practical scalable larger, more complex datasets. As results accumulated, researchers...