A5015904948- Electrocatalysts for Energy Conversion
- Advancements in Solid Oxide Fuel Cells
- Catalytic Processes in Materials Science
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Catalysis and Oxidation Reactions
- Electronic and Structural Properties of Oxides
- Advanced battery technologies research
- Advanced Battery Technologies Research
- Gas Sensing Nanomaterials and Sensors
- Advancements in Battery Materials
- Hybrid Renewable Energy Systems
- Magnetic and transport properties of perovskites and related materials
- Spacecraft and Cryogenic Technologies
- Ammonia Synthesis and Nitrogen Reduction
- Molecular Junctions and Nanostructures
- Advanced Battery Materials and Technologies
- Conducting polymers and applications
- Ionic liquids properties and applications
- CO2 Reduction Techniques and Catalysts
- Air Quality Monitoring and Forecasting
- Planetary Science and Exploration
- Catalysts for Methane Reforming
- Radiation Effects in Electronics
- Advanced Thermodynamic Systems and Engines
Centre for Research and Technology Hellas
2014-2024
Aristotle University of Thessaloniki
2013-2024
Université Claude Bernard Lyon 1
2013
Centre National de la Recherche Scientifique
2013
University of Patras
1997-2006
Over the last decades, there has been significant progress toward development of advanced electrochemical processes in fields energy production and storage, surface modification materials environmental remediation. Within context biomass valorization biorefineries, oxidation 5-hydroxymethylfurfural (HMF), one top biomass-derived platform chemicals, to 2,5-furandicarboxylic acid (FDCA), a valuable monomer building block polyethylene furanoate (PEF), emerged as promising sustainable...
A two-Kelvin-probe arrangement was used to measure, for the first time in situ, work functions, Φ, of gas-exposed surfaces porous Pt, Au, and Ag working reference electrodes exposed mixtures, deposited on 8% -stabilized (YSZ) a three-electrode solid electrolyte cell. It found that at temperatures above 600 K potential difference, between (W) (R) electrode reflects difference actual, spillover, adsorption-modified two
IrO2 shell–Ir−Ni core particulate films (denoted as (Ir−Ni)) have been prepared by galvanic replacement of Ni layers electrodeposited on glassy carbon (GC) electrodes. The method involves three steps: immersion the Ni/GC electrode into a deaerated solution Ir(IV) at 65 °C for 15 min (galvanic replacement); electrochemical treatment resulting Ir−Ni/GC anodic dissolution nonreacted surface and enrichment in Ir (formation precursor core–shell structure denoted (Ir−Ni)); anodization (Ir−Ni)/GC...
The catalytic activity of an catalyst used as electrode on a YSZ solid electrolyte cell for the gas‐phase combustion ethylene can be increased by electrochemical pretreatment. Thus, polarization during 90 min at 300 μA relative to gold electrode, both deposited YSZ, increases after current interruption factor 3. In situ work function measurements showed that pretreatment obtains higher activation is explained through formation oxide, .
The heterogeneous catalytic oxidation of H2 on Pt was investigated black and Pt−graphite electrodes, also serving as catalysts, in aqueous alkaline solutions a function electrode potential current. Hydrogen−oxygen mixtures were bubbled over the surface through porous Teflon frit, rates O2 consumption measured via on-line mass spectrometry gas chromatography. It found that positive current application enhances rate by up to 500% increase is 100 times larger than I/2F electrocatalytic...
The kinetics of oxidation by gaseous were investigated on a Pt‐black catalyst film also serving as working electrode in Nafion 117 solid polymer electrolyte cell. Pt‐covered side the membrane was exposed to flowing mixture and other contact with 0.1 M KOH aqueous solution an immersed Pt counterelectrode. It found that applied current catalyst‐electrode potential affect catalytic rate very pronounced reversible manner. Positive currents enhance up 2000%. increase is 300 times larger than...
Ternary Pt-Ru-Ni deposits on glassy carbon substrates, Pt-Ru(Ni)/GC, have been formed by initial electrodeposition of Ni layers onto electrodes, followed their partial exchange for Pt and Ru, upon immersion into equimolar solutions containing complex ions the precious metals. The overall morphology composition has studied SEM microscopy EDS spectroscopy. Continuous but nodular films confirmed, with a Pt÷Ru÷Ni % bulk atomic ratio 37÷12÷51 (and binary Pt-Ni control systems 47÷53). Fine...
Understanding the surface chemistry of electrode materials under gas environments is important in order to control their performance during electrochemical and catalytic applications. This work compares reactivity Ni/YSZ La0.75Sr0.25Cr0.9Fe0.1O3, which are commonly used types electrodes solid oxide devices. In situ synchrotron-based near-ambient pressure photoemission absorption spectroscopy experiments, assisted by theoretical spectral simulations combined with microscopy measurements,...