Home

Person

Hubert Girault

About
Privacy
Disclaimer

Graph Chatbot

Related publications (430)

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

Amino-functionalized macroporous silica for efficient tryptic digestion in acidic solutions

Hubert Girault, Jingjing Wan, Liang Qiao

Amino-functionalized macroporous silica foam (NH2-MOSF) has been developed as a host reactor to realize highly efficient proteolysis in acidic solutions where normal tryptic reactions cannot occur. The digestion protocol consists simply of adding the funct ...

Wiley-Blackwell2013

Floating conductive catalytic nano-rafts at soft interfaces for hydrogen evolution

Hubert Girault, Micheal Diarmaid Scanlon

Mo2C nanowires and composites of Mo2C nanoparticles formed on multiwalled carbon nanotubes (Mo2C/CNT) were developed as advanced catalysts for hydrogen evolution at a polarised water–1,2-dichloroethane interface. Each catalyst acts as a catalytic nano-raft ...

Royal Soc Chemistry2013

Parylene C Coated Microelectrodes For Scanning Electrochemical Microscopy

Hubert Girault, Carlos Manuel De Melo Pereira, Fernando Cortes Salazar, Haiqiang Deng, Pekka Eero Peljo

Herein, we present a simple microelectrode preparation methodology consisting in coating a platinum wire or a carbon fiber with a thin insulating Parylene C film (e.g. 1–10 μm), to produce SECM probes with a small and constant probe RG (i.e. ratio between ...

Elsevier2013

Electrochemical Pseudo-Titration of Water-Soluble Antioxidants

Hubert Girault, Alice Adei Neequaye, Fernando Cortes Salazar, Andreas Stephan Lesch

An amperometric test for the antioxidant power (AOP) of biological and food samples is presented. The gist of the method is to measure by linear sweep voltammetry the anodic current produced during the oxidation of the labile species present in the sample ...

Wiley-Blackwell2013

Electrostatic-spray ionization mass spectrometry sniffing for perfume fingerprinting

Hubert Girault, Liang Qiao, Elena Tobolkina

RATIONALE: The perfume market is growing significantly, and it is easy to find imitative fragrances of probably all types of perfume. Such imitative fragrances are usually of lower quality than the authentic ones, creating a possible threat for perfume com ...

Wiley-Blackwell2013

Dual-Channel Electrospray Microchip

Hubert Girault, Niels Erik Lion, Yu Lu, Fang Liu

A dual-channel electrospray microchip has been developed for electrospray ionization mass spectrometry (ESI-MS) where aqueous samples are mixed at the Taylor cone with an organic buffer. Due to the fast and effective mixing in the Taylor cone, the aqueous ...

2013

Electrochemically Controlled Proton-Transfer-Catalyzed Reactions at Liquid-Liquid Interfaces: Nucleophilic Substitution on Ferrocene Methanol

Hubert Girault, Liang Qiao, Pekka Eero Peljo

The generation of α-ferrocenyl carbocations from ferrocenyl alcohols for SN1 substitution at the water–organic solvent interface is initiated by the transfer of protons into the organic phase. The proton flux, and hence the reaction rate, can be controlled ...

Wiley-Blackwell2013

High-throughput scanning electrochemical microscopy brushing of strongly tilted and curved surfaces

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

The feasibility of high-throughput scanning electrochemical microscopy (SECM) of strongly tilted (tilt angles ≤4°) and curved substrates (diameter of curvature ≥9 cm) is demonstrated by brushing them with a soft linear array of carbon microelectrodes. This ...

Elsevier2013

MoS2 formed on Mesoporous Graphene as a Highly Active Catalyst for Hydrogen Evolution

Hubert Girault, Micheal Diarmaid Scanlon, Jie Zhu

A highly active and stable electrocatalyst for hydrogen evolution is developed based on the in situ formation of MoS2 nanoparticles on mesoporous graphene foams (MoS2/MGF). Taking advantage of its high specific surface area and its interconnected conductiv ...

Wiley-Blackwell2013

Antioxidant Promotion of Tyrosine Nitration in the Presence of Copper(II)

Hubert Girault, Liang Qiao

Copper(II) is known to catalyze the generation of reactive nitrogen species in the presence of hydrogen peroxide, nitrite or nitric oxide, leading to tyrosine nitration, a biomarker for free radical species associated diseases. Here, we find that biologica ...

Royal Society of Chemistry2013

Photoreduction of CO2 Using [Ru(bpy)2(CO)L]n+ Catalysts in Biphasic Solution/Supercritical CO2 Systems

Hubert Girault, Patrick Voyame, Manuel Alejandro Méndez Agudelo, Kathryn Ellen Toghill

The photosensitized reduction of carbon dioxide by the molecular catalyst [Ru(bpy)2(CO)L] is studied in a biphasic liquid-condensed gas system. Increasing pressure is shown to enhance the initial production rate and turnover number of the catalyst before d ...

Amer Chemical Soc2013

Photoproduction of hydrogen at polarized liquid/liquid interfaces

Hubert Girault, Lucie Josette Renée Rivier

Amer Chemical Soc2013

Hydrogen Peroxide Generation at Liquid|Liquid Interface under Conditions Unfavorable for Proton Transfer from Aqueous to Organic Phase

Hubert Girault

The charge transfer processes across the interface between two immiscible electrolyte solutions (ITIES) can be employed for energy storage and conversion, solvent extraction, or sensing or in life sciences. Among them are catalytic reactions, which have on ...

Amer Chemical Soc2013

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

Compatible Buffer for Capillary Electrophoresis and Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry

Hubert Girault, Hong-Xu Chen, Liang Qiao, Natalia Gasilova

A compatible buffer system for the coupling of capillary electrophoresis (CE) with matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) was developed. The employed interface consists of a robot to drive a sliver-covered separation capil ...

Royal Society of Chemistry2013

REDOX FLOW BATTERY FOR HYDROGEN GENERATION

Christos Comninellis, Hubert Girault, Véronique Amstutz, Kathryn Ellen Toghill

The present invention combines the storage capacity of redox flow batteries and the production of hydrogen and other products of chemical redox reactions. The redox couple of each electrolyte is chemically regenerated on a specific catalyst bed 11, replaci ...

2013

Steady-state macroscale voltammetry in a supercritical carbon dioxide medium

Hubert Girault, Patrick Voyame, Astrid Johana Olaya Avendano, Dmitry Momotenko, Kathryn Ellen Toghill

The electrochemical oxidation and reduction of decamethylferrocene is demonstrated in supercritical carbon dioxide at a macro gold disc electrode at 100 bar and 313 K. Fast mass transport effects were exhibited and the corresponding steady-state voltammetr ...

Royal Soc Chemistry2013

Differential capacitance of liquid/liquid interfaces of finite thicknesses: a finite element study

Hubert Girault, Carlos Manuel De Melo Pereira, Dmitry Momotenko

Finite element simulations were used to investigate the effect of a smooth variation of permittivity across a polarized liquid/liquid interface on the differential capacitance. The results show that a relative permittivity profile can account for the varia ...

Royal Soc Chemistry2012

Electrostatic-Spray Ionization Mass Spectrometry

Hubert Girault, Romain Sartor, Yu Lu, Liang Qiao, Elena Tobolkina, Natalia Gasilova

An electrostatic-spray ionization (ESTASI) method has been used for mass spectrometry (MS) analysis of samples deposited in or on an insulating substrate. The ionization is induced by a capacitive coupling between an electrode and the sample. In practice, ...

Amer Chemical Soc2012

Page 10 of 22