Publications de Daniel Andreas Merki

Evidence from in Situ X-ray Absorption Spectroscopy for the Involvement of Terminal Disulfide in the Reduction of Protons by an Amorphous Molybdenum Sulfide Electrocatalyst

Xile Hu, Heron Vrubel, Daniel Andreas Merki

The reduction of protons into dihydrogen is important because of its potential use in a wide range of energy applications. The preparation of efficient and cheap catalysts for this reaction is one of the issues that need to be tackled to allow the widespre ...

American Chemical Society2015

Amorphous Molybdenum Sulfide Films as Hydrogen Evolution Catalysts in Water

Daniel Andreas Merki

Molecular hydrogen is a promising candidate to replace fossil fuels as the energy carrier. Hydrogen does not exist in its molecular form on earth and must therefore be generated, starting from hydrogen-rich compounds. Water would be a renewable resource fo ...

EPFL2012

Fe, Co, and Ni Ions Promote the Catalytic Activity of Amorphous Molybdenum Sulfide Films for Hydrogen Evolution

Stéphane Fierro, Lorenzo Rovelli, Xile Hu, Heron Vrubel, Daniel Andreas Merki

Molybdenum sulfide materials had been shown as promising non-precious catalysts for hydrogen evolution. This paper describes the study of the promotional effect of certain transition metal ions on the activity of amorphous MoS3 films. Ternary metal sulfide ...

2012

Hydrogen evolution catalyzed by MoS3 and MoS2 particles

Xile Hu, Heron Vrubel, Daniel Andreas Merki

Amorphous MoS3 particles are prepared using a simple chemical method. Several deposition techniques are developed to fabricate electrodes loaded with MoS3 particles. These electrodes are highly active for hydrogen evolution. The catalytically active specie ...

2012

Amorphous Molybdenum Sulfide Films as Catalysts for Electrochemical Hydrogen Production in Water

Stéphane Fierro, Xile Hu, Heron Vrubel, Daniel Andreas Merki

Amorphous molybdenum sulfide films are efficient hydrogen evolution catalysts in water. The films are prepared via simple electro-polymerization procedures and are characterized by XPS, electron microscopy and electronic absorption spectroscopy. Whereas th ...

2011

Recent developments of molybdenum and tungsten sulfides as hydrogen evolution catalysts

Xile Hu, Daniel Andreas Merki

Recent work shows that nanoparticulate and amorphous molybdenum and tungsten sulfide materials are active catalysts for hydrogen evolution in aqueous solution. These materials hold promise for applications in clean hydrogen production technologies. In this ...

Royal Society of Chemistry2011

Amorphous transition metal sulphide films or solids as efficient electrocatalysts for hydrogen production from water or aqueous solutions

Xile Hu, Heron Vrubel, Daniel Andreas Merki

The present invention relates to metal electrocatalysts for hydrogen production from water or aqueous solutions and use thereof in electrodes and electrolysers. ...

2011