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Publications associées (30)

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Triode Solid Oxide Fuel Cell Operation Under Sulfur-Poisoning Conditions

Jan Van Herle, Stefan Diethelm, Priscilla Caliandro

The triode solid oxide fuel cell (SOFC) is a three electrodes configuration. The third electrode, so-called auxiliary, is connected in a way to run in electrolysis mode, while cathode and anode operate in normal fuel cell mode. This mixed operation allows ...

Wiley-V C H Verlag Gmbh2017

Electronic and structural characterization of barrier-type amorphous aluminium oxide

Alfredo Pasquarello, Francesco Ambrosio, Claudia Cancellieri

The structural, electronic, and dielectric properties of barrier -type anodic Al oxides prepared with various thicknesses have been investigated. The planar and cross morphologies as well as the surface charge distribution were investigated as a function o ...

Elsevier2017

Redox Electrocatalysis of Floating Nanoparticles: Determining Electrocatalytic Properties without the Influence of Solid Supports

Hubert Girault, Pekka Eero Peljo, Micheal Diarmaid Scanlon, Astrid Johana Olaya Avendano, Evgeny Smirnov, Thomas James Stockmann, Lucie Josette Renée Rivier

Redox electrocatalysis (catalysis of electron-transfer reactions by floating conductive particles) is discussed from the point-of-view of Fermi level equilibration, and an overall theoretical framework is given. Examples of redox electrocatalysis in soluti ...

2017

Spectroelectrochemical analysis of the mechanism of (photo)electrochemical hydrogen evolution at a catalytic interface

Michael Graetzel, Florian Le Formal, Matthew Thomas Mayer, Stanley David Tilley

Multi-electron heterogeneous catalysis is a pivotal element in the ( photo) electrochemical generation of solar fuels. However, mechanistic studies of these systems are difficult to elucidate by means of electrochemical methods alone. Here we report a spec ...

Springer Nature2017

Role of microstructure on electrode operating mechanisms for mixed ionic electronic conductors: From synchrotron-based 3D reconstruction to electrochemical modeling

Arata Nakajo

A typical La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) electrode was reconstructed by X-ray nanotomography. The new Nano Imaging beamline ID16A-NI of the European Synchrotron Radiation Facility (ESRF) was used to conduct the investigation. Particular attention was ...

Elsevier Science Bv2016

Enhanced reactivity of water clusters towards oxidation in water/acetonitrile mixtures as studied by voltammetry at IrO2 nanoparticle modified FTO electrodes

Hubert Girault, Jonnathan Cesar Hidalgo Acosta, Pekka Eero Peljo, Manuel Alejandro Méndez Agudelo, Micheal Diarmaid Scanlon

The water oxidation process in acidified water/acetonitrile mixtures was studied by cyclic voltammetry using fluorinated tin oxide (FTO) electrodes modified layer-by-layer with deposited bilayers of positively charged poly(diallyldimethylammonium chloride) ...

Wiley-V C H Verlag Gmbh2016

Ionic liquids enhance the electrochemical CO2 reduction catalyzed by MoO2

Xile Hu, Yeonji Oh

Several imidazolium-based ionic liquids significantly enhance the activity of MoO2 for electrochemical reduction of CO2. The over-potential of CO2 reduction is as low as 40 mV. The ionic liquids act as both electrolytes and co-catalysts, which not only lea ...

Royal Society of Chemistry2015

Highly-Ordered Magneli Ti4O7 Nanotube Arrays as Effective Anodic Material for Electro-oxidation

Christos Comninellis

Pure Magneli Ti4O7 nanotube arrays (NTA) were successfully fabricated by reducing TiO2 NTA with hydrogen at 850 degrees C for 30 minutes. The microstructure, composition and electrochemical behavior of the prepared Ti4O7 NTA were characterized by means of ...

Pergamon-Elsevier Science Ltd2015

Charging and Discharging at the Nanoscale: Fermi Level Equilibration of Metallic Nanoparticles

Hubert Girault, Pekka Eero Peljo, Manuel Alejandro Méndez Agudelo, Evgeny Smirnov, Micheal Diarmaid Scanlon

The redox properties of metallic nanoparticles are discussed, in particular the relationships between excess charge, size and the Fermi level of the electrons. The redox potentials are derived using simple electrostatic models to provide a straightforward ...

Royal Soc Chemistry2015

Widely available active sites on Ni2P for electrochemical hydrogen evolution - insights from first principles calculations

Xile Hu, Lucas-Alexandre Stern, Ligang Feng, Martin Hangaard Hansen

We present insights into the mechanism and the active site for hydrogen evolution on nickel phosphide (Ni2P). Ni2P was recently discovered to be a very active non-precious hydrogen evolution catalyst. Current literature attributes the activity of Ni2P to a ...

Royal Society of Chemistry2015