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Heron Vrubel

Cette personne n’est plus à l’EPFL

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Publications associées (35)

All-Vanadium Dual Circuit Redox Flow Battery for Renewable Hydrogen Generation and Desulfurisation

Hubert Girault, Frédéric Gumy, Pekka Eero Peljo, Heron Vrubel, Véronique Amstutz, Christopher Raymond Dennison, Kathryn Ellen Toghill, Joana Morgado, Justine Nadine Liliane Pandard

An all-vanadium dual circuit redox flow battery is an electrochemical energy storage system capable to function as a conventional battery, but also to produce hydrogen and perform desulfurization when surplus of electricity is available by chemical dischar ...

Royal Society of Chemistry2016

Catalysis of water oxidation in acetonitrile by iridium oxide nanoparticles

Hubert Girault, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Véronique Amstutz, Micheal Diarmaid Scanlon, Jonnathan Cesar Hidalgo Acosta

Water oxidation catalysed by iridium oxide nanoparticles (IrO2 NPs) in water–acetonitrile mixtures using [RuIII(bpy)3]3+ as oxidant was studied as a function of the water content, the acidity of the reaction media and the catalyst concentration. It was obs ...

2015

Chaotropic Agents Boosting the Performance of Photo-ionic Cells

Hubert Girault, Astrid Johana Olaya Avendano, Pekka Eero Peljo, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Jelissa Risse, Romain Bourdon

Photo-ionic cells are a simple and scalable concept for direct solar energy storage, where the redox fuels produced by the photoreaction are separated in different phases to prevent recombination. The presence of chaotropic agents such as urea, that break ...

Amer Chemical Soc2015

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

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

Michael Graetzel, Xile Hu, Heron Vrubel, Stanley David Tilley, Carlos Gilberto Morales Guio

Concerns over climate change resulting from accumulation of anthropogenic carbon dioxide in the atmosphere and the uncertainty in the amount of recoverable fossil fuel reserves are driving forces for the development of renewable, carbon-neutral energy tech ...

Nature Publishing Group2014

Photo-Ionic Cells: Two Solutions to Store Solar Energy and Generate Electricity on Demand

Hubert Girault, Pekka Eero Peljo, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Micheal Diarmaid Scanlon

A solar energy conversion concept based on the photo-induced separation of a pair of redox species in a biphasic liquid cell is presented. The redox pair is subsequently discharged in an electrochemical flow cell to generate electricity. To illustrate this ...

Amer Chemical Soc2014

Easily-prepared dinickel phosphide (Ni2P) nanoparticles as an efficient and robust electrocatalyst for hydrogen evolution

Xile Hu, Michaël Bensimon, Heron Vrubel, Ligang Feng

Polydispersed dinickel phosphide (Ni2P) nanoparticles were synthesized by a simple and scalable solid-state reaction. These nanoparticles are an excellent and robust catalyst for the electrochemical hydrogen evolution reaction, operating in both acidic and ...

Royal Society of Chemistry2014

Gold Metal Liquid-Like Droplets

Hubert Girault, Pierre-François Marie Brevet, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Micheal Diarmaid Scanlon, Dmitry Momotenko, Evgeny Smirnov

Simple methods to self-assemble coatings and films encompassing nanoparticles are highly desirable in many practical scenarios, yet scarcely any examples of simple, robust approaches to coat macroscopic droplets with continuous, thick (multilayer), reflect ...

Amer Chemical Soc2014

Renewable hydrogen generation from a dual-circuit redox flow battery

Hubert Girault, Christos Comninellis, Xile Hu, Heron Vrubel, Véronique Amstutz, Kathryn Ellen Toghill, Francis Powlesland

Redox flow batteries (RFBs) are particularly well suited for storing the intermittent excess supply of renewable electricity; so-called “junk” electricity. Conventional RFBs are charged and discharged electrochemically, with electricity stored as chemical ...

Royal Soc Chemistry2014

Electrochemical reduction of CO2 in organic solvents catalyzed by MoO2

Xile Hu, Heron Vrubel, Yeonji Oh, Sébastien Guidoux

MoO2 microparticles act as an active catalyst for the electrochemical reduction of CO2 in organic solvents such as acetonitrile and dimethylformamide. The catalytic activity and product selectivity depend on temperature and water content of the solvent. ...

Royal Society of Chemistry2014

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Chaotropic Agents Boosting the Performance of Photo-ionic Cells

Hubert Girault, Astrid Johana Olaya Avendano, Pekka Eero Peljo, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Jelissa Risse, Romain Bourdon

Amer Chemical Soc2015

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

American Chemical Society2015

Hydrogen evolution from a copper(I) oxide photocathode coated with an amorphous molybdenum sulphide catalyst

Michael Graetzel, Xile Hu, Heron Vrubel, Stanley David Tilley, Carlos Gilberto Morales Guio

Nature Publishing Group2014

Photo-Ionic Cells: Two Solutions to Store Solar Energy and Generate Electricity on Demand

Hubert Girault, Pekka Eero Peljo, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Micheal Diarmaid Scanlon

Amer Chemical Soc2014

Easily-prepared dinickel phosphide (Ni2P) nanoparticles as an efficient and robust electrocatalyst for hydrogen evolution

Xile Hu, Michaël Bensimon, Heron Vrubel, Ligang Feng

Royal Society of Chemistry2014