Publications de Heron Vrubel | EPFL Graph Search

Experimental correlations and integration of gas boosters in a hydrogen refueling station

Hubert Girault, Heron Vrubel, Yorick Ligen, Johnny Arlettaz

2020

Energy efficient hydrogen drying and purification for fuel cell vehicles

Hubert Girault, Heron Vrubel, Yorick Ligen

High-purity standards are required for hydrogen used in fuel cell vehicles. The relative abundance of contaminants is highly influenced by the production pathway. Hydrogen obtained from water electrolysis presents three main pollutants: Nitrogen, Oxygen an ...

Elsevier2020

Mechanistic study of the photo‐generation of hydrogen by decamethylruthenocene

Hubert Girault, Pekka Eero Peljo, Manuel Alejandro Méndez Agudelo, Heron Vrubel, Micheal Diarmaid Scanlon, Laurent Alexis Clément Vannay, Sunny Isaïe Maye, Lucie Josette Renée Rivier

Hydrogen evolution by decamethylruthenocene (Cp*2RuII) was studied in detail highlighting that metallocenes are capable of photo‐reducing hydrogen without the need of an additional sensitizer. Electrochemical, gas chromatographic and spectroscopic (UV/vis, ...

2019

On-Site Purification of Copper-Contaminated Vanadium Electrolytes by using a Vanadium Redox Flow Battery

Hubert Girault, Heron Vrubel, Alberto Battistel, Christopher Raymond Dennison, Danick Reynard

Corrosion of carbon-based electrodes and bipolar plates is a major hurdle and can be a cause of failure in commercial vanadium redox flow batteries (VRFBs). Carbon corrosion was found to occur in a commercial VRFB (10 kW/40 kWh), whereby cracks through bip ...

WILEY-V C H VERLAG GMBH2019

Local Energy Storage and Stochastic Modeling for Ultrafast Charging Stations

Hubert Girault, Heron Vrubel, Yorick Ligen

Multi-stall fast charging stations are often thought to require megawatt-range grid connections. The power consumption profile of such stations results in high cost penalties due to monthly power peaks and expensive linkage fees. A local energy storage sys ...

2019

Polymer-Brush-Templated Three-Dimensional Molybdenum Sulfide Catalyst for Hydrogen Evolution

Harm-Anton Klok, Lucas-Alexandre Stern, Xile Hu, Heron Vrubel, Piotr Mocny, Tugba Bilgiç Tune

Earth-abundant hydrogen evolution catalysts are essential for high-efficiency solar-driven water splitting. Although a significant amount of studies have been dedicated to the development of new catalytic materials, the microscopic assembly of these materi ...

2018

Mobility from Renewable Electricity: Infrastructure Comparison for Battery and Hydrogen Fuel Cell Vehicles

Hubert Girault, Heron Vrubel, Yorick Ligen

This work presents a detailed breakdown of the energy conversion chains from intermittent electricity to a vehicle, considering battery electric vehicles (BEVs) and fuel cell electric vehicles (FCEVs). The traditional well-to-wheel analysis is adapted to a ...

MDPI2018

Redox Solid Energy Boosters for Flow Batteries: Polyaniline as a Case Study

Hubert Girault, Pekka Eero Peljo, Heron Vrubel, Véronique Amstutz, Alberto Battistel, Christopher Raymond Dennison, Elena Zanzola

In this work, the viability of polyaniline as a solid charge storage material in an aqueous redox-mediated flow battery is investigated. Fe(III/II) and V(IV/III) were identified as potential redox mediators to target the emeraldine-pernigraniline and leuco ...

Elsevier2017

Mediated water electrolysis in biphasic systems

Hubert Girault, Pekka Eero Peljo, Heron Vrubel, Micheal Diarmaid Scanlon, Lucie Josette Renée Rivier

The concept of efficient electrolysis by linking photoelectrochemical biphasic H2 evolution and water oxidation processes in the cathodic and anodic compartments of an H-cell, respectively, is introduced. Overpotentials at the cathode and anode are minimis ...

Royal Society of Chemistry2017

Boosting Water Oxidation Layer-by-Layer

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

Electrocatalysis of water oxidation was achieved using fluorinated tin oxide (FTO) electrodes modified with layer-by-layer deposited films consisting of bilayers of negatively charged citrate-stabilized IrO2 NPs and positively charged poly(diallyldimethyla ...

Royal Society of Chemistry2016