A5090095056- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Pigment Synthesis and Properties
- Pomegranate: compositions and health benefits
- Machine Learning in Materials Science
- Antioxidant Activity and Oxidative Stress
- Free Radicals and Antioxidants
- Semiconductor materials and devices
- Photochemistry and Electron Transfer Studies
- Catalysis and Hydrodesulfurization Studies
- Conducting polymers and applications
- Radical Photochemical Reactions
- Gas Sensing Nanomaterials and Sensors
- Electron Spin Resonance Studies
- Nanoporous metals and alloys
- Minerals Flotation and Separation Techniques
- Ginkgo biloba and Cashew Applications
- Advanced Nanomaterials in Catalysis
- CO2 Reduction Techniques and Catalysts
Technical University of Denmark
2015-2023
Danish Technological Institute
2018
Universitat de Barcelona
2009-2014
BC Innovation Council
2011
The high platinum loadings required to compensate for the slow kinetics of oxygen reduction reaction (ORR) impede widespread uptake low-temperature fuel cells in automotive vehicles. We have studied ORR on eight (Pt)-lanthanide and Pt-alkaline earth electrodes, Pt5M, where M is lanthanum, cerium, samarium, gadolinium, terbium, dysprosium, thulium, or calcium. materials are among most active polycrystalline Pt-based catalysts reported, presenting activity enhancement by a factor 3 6 over Pt....
Carbon-supported Fe–Nx/C catalysts were synthesized at several pyrolysis temperatures such as 600, 700, 800, and 900 °C in the effort to investigate temperature effect on catalyst structures. The Fe contents found be about 1 wt % more than that Fe–TPPZ/C precursor complex (5 %), indicating both carbon support ligand might decomposed during pyrolysis. X-ray diffraction (XRD) analysis revealed samples 600–800 had no iron species segregation, while formed showed formation of Fe3C Fe3O4,...
Platinum–rare-earth alloys have proven to be both active and stable under accelerated stability tests in their bulk polycrystalline form. However, a scalable method for the synthesis of high-surface-area supported catalyst these has so far not been presented. Herein we discuss thermodynamics relevant reduction conditions rare earths form with platinum. We show how tolerance water oxygen severely limits parameters certain thermal YCl3 H2 is possible from 500 °C. From insight gained,...
The structural properties of the nanoparticles a high-performance commercial unsupported Pt−Ru electrocatalyst with nominal equiatomic relationship have been studied. They were exhaustively determined by transmission electron microscopy (TEM), high-resolution TEM, fast Fourier transform, diffraction, X-ray photoelectron spectroscopy (XPS), and diffraction (XRD) techniques. TEM its coupled techniques showed that polyoriented present an average size 3.0 ± 0.5 nm nondetection metal oxides. XPS...
The modification of carbon-supported Pt nanoparticles, high performance (HP) 20% on Vulcan XC-72 carbon black (Pt/C electrocatalyst), by spontaneous deposition Ru species is examined employing electrochemical and structural techniques. Thin-layer electrodes were prepared applying aqueous catalyst inks Pt/C glassy (GC) disks. was carried out immersion the electrode in deaerated RuCl3/HClO4 solutions. subsequent cyclic voltammetry experiments modified electrocatalysts (Ru(Pt)/C) performed 0.5...
Plant polyphenols may be free radical scavengers or generators, depending on their nature and concentration. This dual effect, mediated by electron transfer reactions, contribute to influence cell viability. study used two stable radicals (tris(2,3,5,6-tetrachloro-4-nitrophenyl)methyl (TNPTM) tris(2,4,6-trichloro-3,5-dinitrophenyl)methyl (HNTTM)) sensitive only reduction reactions monitor the redox properties of (punicalagin catechins) that contain phenolic hydroxyls with different reducing...
The condensation reaction of d-maltose to free radicals the series tris(2,4,6-trichlorophenyl)methyl (TTM) and tris(perchlorophenyl)methyl (PTM) has been described for first time. new persistent 1 2 are very stable have characterized by EPR. Their cyclic voltammograms show a quasi-reversible process in cathode, being reduced corresponding anions, with redox potentials little lower than those TTM PTM, respectively. oxidant activity is close relation their reduction potentials. Therefore,...
The use of TiO2 nanoparticles in organic-based photocatalytic coatings imposes several challenges: poor activity under visible light, binder photo-degradation, need for UV activation and toxicity concerns. Here we present a scalable two-step synthesis route to prepare TiO2-based hollow microspheres (HoS) as alternative photocatalyst commercial nanoparticles. or WO3-doped (3 mol% WO3) are synthesized via template-assisted spray-drying followed by calcination. structure composition the powders...