Concept

Dynamic hydrogen electrode

Publications associées (28)

A dip coating process for large area silicon-doped high performance hematite photoanodes

Michael Graetzel, Yelin Hu, Artur Braun, Florent Alexandre Boudoire

A facile and low-cost dip-coating process for the deposition of silicon doped hematite films (Si:alpha-Fe2O3) for hydrogen production by solar water splitting in photo-electrochemical cells (PEC) is presented. The precursors include iron nitrate, oleic aci ...

Amer Inst Physics2013

Passivating surface states on water splitting hematite photoanodes with alumina overlayers

Michael Graetzel, Kevin Sivula, Nicolas Tétreault, Thomas Moehl, Florian Le Formal, Maurin Cornuz

Hematite is a promising material for inexpensive solar energy conversion via water splitting but has been limited by the large overpotential (0.5-0.6 V) that must be applied to afford high water oxidation photocurrent. This has conventionally been addresse ...

2011

Highly active oxide photocathode for photoelectrochemical water reduction

Michael Graetzel, Kevin Sivula, Vincent Laporte, Adriana Paracchino

A clean and efficient way to overcome the limited supply of fossil fuels and the greenhouse effect is the production of hydrogen fuel from sunlight and water through the semiconductor/water junction of a photoelectrochemical cell, where energy collection a ...

Nature Publishing Group2011

Light-Induced Water Splitting with Hematite: Improved Nanostructure and Iridium Oxide Catalysis

Michael Graetzel, Kevin Sivula, Stanley David Tilley, Maurin Cornuz

Revved-up rust! Light-induced water splitting over iron oxide (hematite) has been achieved by using a particle-assisted deposition technique and IrO2-based surface catalysis. Photocurrents in excess of 3 mA cm-2 were obtained at +1.23 V versus the reversib ...

Wiley-VCH Verlag GmbH2010

Photoelectrochemical Water Splitting with Mesoporous Hematite Prepared by a Solution-Based Colloidal Approach

Michael Graetzel, Kevin Sivula, Florian Le Formal

Sustainable hydrogen production through photoelectrochemical water splitting using hematite (alpha-Fe2O3) is a promising approach for the chemical storage of solar energy, but is complicated by the material's nonoptimal optoelectronic properties. Nanostruc ...

American Chemical Society2010

Controlling Photoactivity in Ultrathin Hematite Films for Solar Water-Splitting

Michael Graetzel, Kevin Sivula, Florian Le Formal

A promising route to increase the performance of hematite (alpha-Fe2O3) photoelectrodes for solar hydrogen production through water-splitting is to use an extremely thin layer of this visible light absorber on a nanostructured scaffold. However, the typica ...

Wiley-Blackwell2010

A cell-electrode interface noise model for high-density microelectrode arrays

Alexandre Schmid, Yusuf Leblebici, Neil Joye

A cell-electrode interface noise model is developed which is dedicated to enable the co-simulation of the cell-electrode electrical characteristics, along with the electronics of novel CMOS-based MEA. The electrode noise is investigated for Pt and Pt black ...

IEEE2009

Electrical modeling of the cell-electrode interface for recording neural activity from high-density microelectrode arrays

Alexandre Schmid, Yusuf Leblebici, Neil Joye

Accurate electrical models are needed to support the design of modern microelectrode arrays. The point-contact model is presented thoroughly, and an area-contact model is analytically derived in order to model the electrical characteristics of the cell-ele ...

2009