Concept

Cycle de l'oxygène

Publications associées (59)

In situ Reduction and Oxidation of Nickel from Solid Oxide Fuel Cells in a Transmission Electron Microscope

Jan Van Herle, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Antonin Faes

Environmental transmission electron microscopy was used to characterize in situ the reduction and oxidation of nickel from a Ni/YSZ solid oxide fuel cell anode support between 300-500°C. The reduction is done under low hydrogen pressure. The reduction init ...

2009

Redox study of anode supported solid oxide fuel cell

Jan Van Herle, Aïcha Hessler-Wyser, Antonin Faes

The common technology for solid oxide fuel cells (SOFC) is based on a cermet anode of nickel with yttrium stabilized zirconia (YSZ), often used as the supporting structure. One of the main limitations of this anode technology is the redox tolerance. In thi ...

2008

Oxygen Control for an Industrial Pilot-Scale Fed-Batch Filamentous Fungal Fermentation

Dominique Bonvin, Levente Bodizs

Industrial filamentous fungal fermentations are typically operated in fed- batch mode. Oxygen control represents an important operational challenge due to the varying biomass concentration. In this study, oxygen control is implemented by manipulating the s ...

2007

Breathing sediments: The control of diffusive transport across the sediment-water interface by periodic boundary-layer turbulence

Alfred Johny Wüest

We performed combined in situ measurements of bottom boundary-layer turbulence and of diffusive oxygen fluxes at the sediment-water interface in a medium-sized mesotrophic lake. The turbulence was driven by internal seiching with a period of 18 h. This per ...

Amer Soc Limnology Oceanography2003

Electrochemical oxidation of water on synthetic boron-doped diamond thin film anodes

Christos Comninellis, György Foti, Lassine Ouattara, Pierre-Alain Michaud, Marco Panizza

Electrolysis in aq. 1M HClO4 and 1M H2SO4 solns. was carried out under galvanostatic conditions using B-doped diamond electrodes (BDD). Analyses of the oxidn. products showed that in 1M HClO4 the main reaction is oxygen evolution, while in H2SO4 the main r ...

Springer, Kluwer Academic Publishers2003

Electrochemical oxidation of water on synthetic boron-doped diamond thin film anodes

Christos Comninellis, György Foti, Lassine Ouattara, Pierre-Alain Michaud, Marco Panizza

2003

Conductive metal-oxide nanoparticles on synthetic boron-doped diamond surfaces

Christos Comninellis, Ilaria Duo

The electrochem. properties of IrO2 and RuO2 nanoparticles, deposited on synthetic B-doped diamond (BDD) surfaces, are discussed. After a description of the prepn. procedure and the morphol. characterization of BDD/IrO2 and BDD/RuO2 samples, the dispersion ...

Dekker2003

Climate and interannual variability of the atmosphere-biosphere 13CO2 flux

Jed Oliver Kaplan

We present a bottom-up approach to simulate the terrestrial isotopic carbon variations using the Lund-Potsdam-Jena dynamic global vegetation model (LPJ-DGVM). LPJ is extended to include isotopic fractionation of C-13 at the leaf level during assimilation a ...

2003

Electrochemical preparation of peroxodisulfuric acid using boron doped diamond thin film electrodes

Christos Comninellis, Pierre-Alain Michaud

The authors have studied the electrochem. oxidn. of H2SO4 on B-doped synthetic diamond electrodes (BDD) obtained by hot filament CVD on p-Si. High current efficiency for H2SO4 oxidn. to peroxodisulfuric acid can be achieved in concd. H2SO4 (>2M) at moderat ...

2002

Deposition of nanoparticles of iridium dioxide on a synthetic boron-doped diamond surface

Christos Comninellis, Ilaria Duo

The electrochem. properties of IrO2 nanoparticles deposited on a synthetic boron-doped diamond surface (BDD/IrO2) were investigated. After a description of the prepn. procedure by thermal decompn. technique, the morphol. characterization of the samples by ...

2002

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