Concept

Gas diffusion electrode

Related publications (87)

Probing the photoelectrochemical properties of hematite (alpha-Fe2O3) electrodes using hydrogen peroxide as a hole scavenger

Michael Graetzel, Kevin Sivula, Scott Charles Warren

We study hematite (alpha-Fe2O3) photoelectrodes for water splitting by examining the fate of photogenerated holes. Using H2O2 as an efficient hole scavenger, we collect all holes that arrive at the electrode/electrolyte interface. This provides the ability ...

2011

Modelling-Assisted Investigation of Degradation Phenomena in LSM-based SOFC Composite Cathodes

Pietro Tanasini

This thesis focuses on the degradation pathways occurring in composite solid oxide fuel cell (SOFC) cathodes based on lanthanum-strontium manganite (LSM), combining modeling at the electrode level with experimental data. LSM composite electrodes are one of ...

EPFL2011

Miniaturized EAPs with compliant electrodes fabricated by ion implantation

Herbert Shea

Miniaturizing dielectric electroactive polymer (EAP) actuators will lead to highly-integrated mechanical systems on a chip, combining dozens to thousands of actuators and sensors on a few cm2. We present here µm to mm scale electroactive polymer (EAP) devi ...

SPIE Digital Library2011

3D Imaging of Catalyst Support Corrosion in Polymer Electrolyte Fuel Cells

During the lifetime of a polymer electrolyte fuel cell, the pore structure of the Pt/C catalyst layer may change as a result of carbon corrosion. Three-dimensional visualization of porosity changes is important to understand the origin of fuel cell perform ...

2011

Current state of models for the prediction of mechanical failures in solid oxide fuel cells

Daniel Favrat, Jan Van Herle, Arata Nakajo

Structural reliability is a hurdle for the large-scale commercialisation of solid oxide fuel cell (SOFC). The cells are prone to cracking, due to the brittleness of their constitutive materials. In operation, the failure of one of them can arise from the n ...

2010

Neuro-Electronic Interfacing Methods for High-Density CMOS-Compatible Microelectrode Arrays

Neil Joye

Recently, CMOS-based microelectrode arrays containing a high-density of electrodes have emerged as a tool enabling recording the extracellular neural electrical activity of cell cultures at subcellular resolution. However, several improvements in areas suc ...

EPFL2010

Porosity in Aluminum Alloys

Milan Felberbaum

Porosity is one of the major defects in castings because it reduces the mechanical properties of a cast piece [1]. Porosity formation results from the effect of two concomitant mechanisms, namely solidification shrinkage and segregation/precipitation of ga ...

EPFL2010

Decoupling Feature Size and Functionality in Solution-Processed, Porous Hematite Electrodes for Solar Water Splitting

Kevin Sivula, Jérémie Minh-Châu Brillet

We introduce a simple solution-based strategy to decouple morphological and functional effects of annealing nanostructured, porous electrodes by encapsulation with a SiO2 confinement scaffold before high temperature treatment We demonstrate the effectivene ...

American Chemical Society2010

Ammonia oxidation to nitrogen mediated by electrogenerated active chlorine on Ti/PtOx-IrO2

Christos Comninellis, Agnieszka Kapalka, Nina-Luisa Michels

The electrochemical oxidation of ammonia (NH3 and/or NH4+) in the presence of chloride was investigated on a Ti/PtOx-IrO2 electrode. It was shown that ammonia is effectively removed from solution via electrogenerated active chlorine. Based on mass balances ...

Elsevier2010

Hydrogen tracer diffusion in LiBH(4) measured by spatially resolved Raman spectroscopy

The hydrogen tracer diffusion in LiBH4 has been determined by spatially resolved Raman spectroscopy. The measurements give direct evidence of a macroscopic diffusion of BH-4 ions as well as atomic exchange of hydrogen between the anions. An effective trace ...

2010

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