A5028187733- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Hydrogen Storage and Materials
- Supercapacitor Materials and Fabrication
- Catalytic Processes in Materials Science
- Ionic liquids properties and applications
- Advancements in Solid Oxide Fuel Cells
- Advancements in Battery Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Polyoxometalates: Synthesis and Applications
- Advanced Battery Materials and Technologies
- Nuclear Materials and Properties
- Hybrid Renewable Energy Systems
- Advanced Memory and Neural Computing
- Ammonia Synthesis and Nitrogen Reduction
- Ultrasound and Cavitation Phenomena
- Transition Metal Oxide Nanomaterials
- Metal-Organic Frameworks: Synthesis and Applications
- MXene and MAX Phase Materials
University of Lisbon
2016-2025
University of Belgrade
2016-2025
Instituto Superior Técnico
2012-2024
University of Cincinnati
2022
Institute of General and Physical Chemistry
2013
Instituto Politécnico de Lisboa
2013
University of Oxford
2004-2009
Queen's University Belfast
2009
We demonstrate that the "electrocatalytic" hydrogen peroxide detection reported at multiwalled carbon nanotube modified electrodes is due to iron oxide particles arising from chemical vapor deposition fabrication process rather than intrinsic catalysis attributable nanotubes arising, for example, edge plane-like sites/defects.
Organic electrosynthesis has received great attention as a powerful green tool for synthesis, affording less waste production, chemicals spent, and often fewer reaction steps than conventional methods. Functional group interconversion C–C bond generation by imposition of proper electrode potential is what lies behind organic processes. Paired electrochemical reactions, indirect electrosynthesis, microreactors, the use ionic liquids are some highlighted means that contribute to optimization...
Molybdenum carbide (Mo<sub>2</sub>C) nanoparticles supported on carbon nanotubes and xerogel were evaluated as electrocatalysts for HER in acid media, showing good performance stability.
Among many alternatives to fossil fuel-based energy systems, one of the most promising is based on hydrogen and its production use in unitized regenerative fuel cells as primary conversion devices. However, there are some setbacks challenges when designing suitable efficient electrocatalysts for these The effective durable catalysts platinum–group metals, with low abundance unbearably high prices. Many attempts were undertaken overcome this setback by massive commercial use. This review...
One of the most popular solutions for electrochemical energy storage is metal−air batteries, which could be employed in electric vehicles or grid storage. Metal–air batteries have a higher theoretical density than lithium-ion batteries. The crucial components best performance are air cathode electrocatalysts and corresponding electrolytes. Herein, we present several latest studies on cathodes bifunctional oxygen aqueous zinc–air aluminium–air
For the first time, composites of metal-organic framework MOF-5 and conjugated polymer polyaniline (PANI), (MOF-5/PANI), prepared using PANI in its conducting (emeraldine salt, ES) or nonconducting form base, EB) at various mass ratios, were evaluated as electrode materials for electrochemical detection cadmium (Cd2+) lead (Pb2+) ions aqueous solutions. Testing individual components composites, PANI-ES, PANI-EB, MOF-5, was also performed comparison. Materials are characterized by Raman...
The cathodic and anodic potential limits of eleven different ionic liquids were determined at a mercury hemisphere electrode. Ionic containing the phosphonium cation (tri(n-hexyl)tetradecylphosphonium, [P14,6,6,6]+) give largest window, especially when coupled to trifluorotris(pentafluoroethyl)phosphate, [FAP]−, or bis(trifluoromethanesulfonyl)imide, [NTf2]−, anion.
Abstract Low‐cost molybdenum carbide (Mo 2 C) nanoparticles supported on carbon nanotubes (CNTs) and xerogel (CXG) were prepared their activity for the hydrogen evolution reaction (HER) was evaluated in 8 m KOH aqueous electrolyte at 25–85 °C. Measurements of HER by linear scan voltammetry allowed us to determine Tafel slopes 71 74 mV dec −1 25 °C Mo C/CNT C/CXG, respectively. Stability tests also performed, which showed steady performance two electrocatalysts. Moreover, kinetics enhanced...
Three different metal oxides based on Mn2O3 with TiO2 or NiO were synthesised. Pt PtNi nanoparticles anchored each support, creating a set of nine samples that tested for the oxygen reduction reaction (ORR) and evolution (OER). PtNi/Mn2O3-NiO showed most promising results ORR as evidenced by lowest Tafel slope, highest diffusion-limited current density number electrons exchanged, along stability. The best performance reflects its electrochemical surface area charge-transfer resistance....
Abstract In search for novel materials to replace noble metal‐based electrocatalysts in electrochemical energy conversion and storage devices, special attention is given a distinct class of materials, MAX phase that combines advantages ceramic metallic properties. Herein, Nb 4 AlC 3 prepared by solid‐state mixing reaction characterized morphologically structurally transmission scanning electron microscopy with energy‐dispersive X‐ray spectroscopy, nitrogen‐sorption, diffraction analysis,...
Climate change is showing its impacts now more than ever. The intense use of fossil fuels and the resulting CO 2 emissions are mainly to blame, accentuating need develop further available energy conversion storage technologies, which regarded as effective solutions maximize intermittent renewable sources reduce global emissions. This work comprehensively overviews most recent progress trends in transition metal-based electrocatalysts for three crucial reactions electrochemical storage,...
Abstract Composite electrodes based on iron(III) oxide, Fe 2 O 3 , carbon powder and epoxy resin have been prepared characterized using electrochemical methods X‐ray photoelectron spectroscopy (XPS). Initially composite were made by mixing micron sized surface with oxide. However, the voltammetric responses unsatisfactory. Therefore, a new type of was modified oxide via wet impregnation procedure. This technique involves saturation nitrate followed thermal treatment at ca. 623 K forming powder.