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Heron Vrubel

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Publications associées (35)

The Intricate Chemistry of Cobalt(II) Halides and Bis(diphenylphosphanyl)ethane

Kay Severin, Rosario Scopelliti, Heron Vrubel, Gregor Kiefer

Phosphane complexes of the putative formula [CoX2(dppe)] [X = Cl, Br, I; dppe = bis(diphenylphosphanyl)ethane] are frequently used catalyst precursors in cobalt-catalyzed reactions. Despite their widespread use, these complexes have not been structurally c ...

Wiley-Blackwell2013

Molybdenum Based Electrocatalysts for Hydrogen Evolution in Water

Heron Vrubel

The limited fossil fuel resources and the increasing levels of greenhouse gases in the atmosphere are the driving forces in the research of alternative ways of energy production and storage. The use of solar energy is expected to grow as our society claims ...

EPFL2013

Low-cost industrially available molybdenum boride and carbide as “platinum-like” catalysts for the hydrogen evolution reaction in biphasic liquid systems

Hubert Girault, Kurt Schenk, Xile Hu, Véronique Amstutz, Heron Vrubel, Micheal Diarmaid Scanlon

Rarely reported low-cost molybdenum boride and carbide microparticles, both of which are available in abundant quantities due to their widespread use in industry, adsorb at aqueous acid–1,2-dichloroethane interfaces and efficiently catalyse the hydrogen ev ...

Royal Soc Chemistry2013

Revealing and Accelerating Slow Electron Transport in Amorphous Molybdenum Sulphide Particles for Hydrogen Evolution Reaction

Michael Graetzel, Xile Hu, Heron Vrubel, Thomas Moehl

Electrochemical impedance spectroscopy is used to identify a slow electron transport process in hydrogen evolution catalysed by amorphous molybdenum sulphides on glassy carbon. A new chemical synthesis leads to an amorphous molybdenum sulfide catalyst with ...

Royal Society of Chemistry2013

Growth and Activation of an Amorphous Molybdenum Sulfide Hydrogen Evolving Catalyst

Xile Hu, Heron Vrubel

Amorphous molybdenum sulfide films, prepared by electrodeposition, are a class of highly active catalysts for hydrogen evolution. The growth mechanism of the films and the true active species were unclear. Herein, we report a study of the growth and activa ...

American Chemical Society2013

Photoinduced Biphasic Hydrogen Evolution: Decamethylosmocene as a Light-Driven Electron Donor

Hubert Girault, Imren Hatay, Heron Vrubel, Peiyu Ge, Astrid Johana Olaya Avendano, Micheal Diarmaid Scanlon

Excitation of the weak electron donor decamethylosmocene on illumination with white light produces an excited-state species capable of reducing organically solubilized protons under biphasic conditions. Insight into the mechanism and kinetics of light-driv ...

Wiley-Blackwell2013

Hydrogen evolution across nano-Schottky junctions at carbon supported MoS2 catalysts in biphasic liquid systems

Hubert Girault, Marco Cantoni, Xile Hu, Heron Vrubel, Peiyu Ge, Micheal Diarmaid Scanlon, Pekka Eero Peljo

The activities of a series of MoS2-based hydrogen evolution catalysts were studied by biphasic reactions monitored by UV/Vis spectroscopy. Carbon supported MoS2 catalysts performed best due to an abundance of catalytic edge sites and strong electronic coup ...

Royal Society of Chemistry2012

Biphasic water splitting by osmocene

Hubert Girault, Anne-Clémence Corminboeuf, Xile Hu, Manuel Alejandro Méndez Agudelo, Imren Hatay, Heron Vrubel, Peiyu Ge, Astrid Johana Olaya Avendano

The photochemical reactivity of osmocene in a biphasic water-organic solvent system has been investigated to probe its water splitting properties. The photoreduction of aqueous protons to hydrogen under anaerobic conditions induced by osmocene dissolved in ...

National Academy of Sciences2012

Molybdenum boride and carbide catalyze hydrogen evolution in both acidic and basic solutions

Xile Hu, Heron Vrubel

Molybdenum boride (MoB) and carbide (Mo2C) are excellent catalysts for electrochemical hydrogen evolution at both pH 0 and pH 14. ...

Wiley-VCH Verlag GmbH2012

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

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

Hydrogen evolution at polarised liquid/liquid interfaces catalyzed by molybdenum disulfide

Hubert Girault, Xile Hu, Imren Hatay, Heron Vrubel, Peiyu Ge

Molybdenum disulfide microparticles in suspension in an aqueous acidic solution adsorb at the interface with an organic electrolyte solution containing the reducing agent, decamethylferrocene, to catalyse hydrogen evolution. This catalytic process has been ...

2011

Hydrogen Evolution at Liquid–Liquid Interfaces

Hubert Girault, Bin Su, Raheleh Partovi Nia, Xile Hu, Imren Hatay, Heron Vrubel

Blowing bubbles: Hydrogen evolution by proton reduction with [(C5Me5)2Fe] occurs at a soft interface between water and 1,2-dichloroethane (DCE). The reaction proceeds by proton transfer assisted by [(C5Me5)2Fe] across the water–DCE interface with subsequen ...

Wiley-VCH Verlag GmbH2009

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