A5051372461- Electrochemical Analysis and Applications
- Electrocatalysts for Energy Conversion
- Ionic liquids properties and applications
- Molecular Junctions and Nanostructures
- Fuel Cells and Related Materials
- CO2 Reduction Techniques and Catalysts
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Surface and Thin Film Phenomena
- Electrodeposition and Electroless Coatings
- Electronic and Structural Properties of Oxides
- Surface Chemistry and Catalysis
- Supercapacitor Materials and Fabrication
- Advanced Thermoelectric Materials and Devices
- Ammonia Synthesis and Nitrogen Reduction
- Force Microscopy Techniques and Applications
- Chalcogenide Semiconductor Thin Films
- Physics of Superconductivity and Magnetism
- Advancements in Solid Oxide Fuel Cells
- Laser-induced spectroscopy and plasma
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Hybrid Renewable Energy Systems
University of Tartu
2007-2024
University of Bern
2015-2023
University of Alicante
2009-2013
Among the electrolyzers under development for CO2 electroreduction at practical reaction rates, gas-fed approaches that use gas diffusion electrodes (GDEs) as cathodes are most promising. However, insufficient long-term stability of these technologies precludes their commercial deployment. The structural deterioration catalyst material is one possible source device durability issues. Unfortunately, this issue has been insufficiently studied in systems using actual technical electrodes....
A novel bismuth oxide nanofoam, produced by means of the dynamic hydrogen bubble template (DHBT) electrodeposition approach followed thermal annealing at 300 °C for 12 h, demonstrates excellent electrocatalytic selectivity toward formate production with faradaic efficiencies (FEs) never falling below 90% within an extended potential window ∼1100 mV (max. FEformate = 100% −0.6 V vs RHE). These promising characteristics result from coupling two distinct reaction pathways formation in aqueous...
Pulsed voltammetry was used to study formic acid electrooxidation on Pt nanoparticles with well-characterized surfaces. Polyoriented and preferential (100), (100−111), (111) were characterized employed evaluate the influence of surface structure shape this model electrochemical reaction. The results pointed out that, in agreement fundamental studies single crystal electrodes, electrodes plays an important role reactivity kinetics oxidation. Thus electrocatalytic properties for reaction...
Pulsed voltammetry has been used to study formic acid oxidation on platinum stepped surfaces determine the kinetics of reaction and role surface structure in reactivity. From current transients at different potentials, intrinsic activity electrode through active intermediate path (j(theta = 0)), as well rate constant for CO formation (k(ads)) have calculated. The is strongly dependent electrode, with highest found Pt(100) surface. presence steps, both (100) (111) terraces, does not increase...
Pulsed voltammetry is used to study formic acid oxidation on Pt(2n-1,1,1) surfaces and determine the effects of size (100) terrace (111) step density reaction mechanism. The intrinsic activity electrode through active intermediate path (j(theta=) (0)), as well rate constant for CO formation (k(ads)), are calculated from current transients obtained at different potentials. For with wide terraces, j(theta=) (0) k(ads) almost insensitive density, which suggests that sites have a similar this...
Formate adsorption: Fast electrochemical techniques allow the detection of formate as adsorbed species from formic acid on platinum single-crystal electrodes (see picture). Additionally, oxidation current for is directly proportional to coverage, which indicates that active intermediate. Detailed facts importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The...
Selective electrochemical reduction of CO<sub>2</sub> to <italic>n</italic>-propanol over an activated, phase-separated PdCu alloy foam catalyst at relatively low overpotentials.
Ethanol oxidation on platinum nanoparticles with well-characterized surfaces is studied using cyclic voltammetry and FTIR techniques. Their behavior compared that obtained for single crystal electrodes, in order to rationalize their performance understand the effects of surface structure anion adsorption reactivity. The results clearly demonstrate there are strong measured current mechanism. Thus, main product ethanol (111) preferentially oriented Pt acetic acid, amount CO2 produced can be...
We study the effect of H+ and OH− diffusion on hydrogen evolution reaction in unbuffered aqueous electrolyte solutions mildly acidic pH values. demonstrate that cathodic polarization curves measured a Ni rotating disk electrode these can be modeled by assuming two irreversible reactions, reduction water molecules, both following Erdey-Grúz–Volmer–Butler kinetics. The yields transport-limited thus, rotation rate-dependent current at not very negative potentials. At more potentials are...
The use of rotating disk electrodes (RDEs) is probably the most convenient way studying simple electrode reactions under well-defined transport conditions. Standard RDEs become, however, less expedient when studied process a complex one, leading to formation various reaction products. In these cases, accurate detection and quantification formed products are desirable. If gaseous, then usual quantifying them online gas chromatography (GC), method that not compatible with open RDE cells. order...
Colloidal electrocatalysts are commonly synthesized using organic capping agents (surfactants), which control the size distribution and shape of resulting nano-objects prevent them from agglomerating during after synthesis. However, presence a surfactant shell on catalyst is detrimental, as performance electrocatalyst depends crucially ability reactants to access active surface sites. Techniques for postsynthesis deprotection therefore mandatory removing otherwise blocked reactions sites...
Abstract The electrochemical oxygen reduction reaction (ORR) on bare (100)Pt nanoparticles supported by molybdenum‐carbide‐derived carbon [(100)Pt–C(Mo 2 C)] with high specific surface area and controlled microporosity–mesoporosity, pore size distribution, electrical conductivity, corrosion stability was studied in 0.5 M H SO 4 solution using rotating‐disk‐electrode cyclic voltammetry methods. C(Mo C) powder prepared from Mo C at a fixed chlorination temperature (750 °C). Pt were through...
Multifunctional electrocatalysts are vastly sought for their applications in water splitting electrolyzers, metal-air batteries, and regenerative fuel cells because of ability to catalyze multiple reactions such as hydrogen evolution, oxygen reduction reactions. More specifically, the application single-atom electrocatalyst multifunctional catalysis is a promising approach ensure good atomic efficiency, tunability additionally benefits simple theoretical treatment. In this review, we provide...
Polarization curves of the hydrogen evolution reaction (HER), recorded on rotating disk electrodes (RDEs) in mildly acidic solutions, usually show a "two step" behavior. That is, two exponentially rising segments (the first commonly assigned to H+, second water reduction) are separated by limiting current plateau. Here, we devise an analytical model for full polarization curve assuming that HER proceeds according quasireversible two-electron reaction, H+ + H2O 2e– ⇌ H2 OH–, obeying...
Dream island: Monoatomic, high-platinum islands deposited on a Rh(1 1 1) electrode have an electrocatalytic activity for ethanol oxidation that is 20 times higher than measured platinum electrodes. On these islands, CO2 and acetic acid are the final products. As service to our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized online delivery, but not copy-edited or typeset. Technical support issues arising from...