Astrid Johana Olaya Avendano

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Publications associées (22)

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

Ultrafast Population Dynamics of Surface-Active Dyes during Electrochemically Controlled Ion Transfer across a Liquid|Liquid Interface

Hubert Girault, Astrid Johana Olaya Avendano, Pierre-François Marie Brevet, Evgeny Smirnov

We present for the first time experimental measurements on the ultrafast population dynamics of the model surface-active dye methyl orange (MO) during its ion transfer across the water|1,2-dichloroethane interface by using time-resolved surface second harm ...

Amer Chemical Soc2014

Interfacial Self-Assembly as Catalytic Platform for Multielectron Redox Reactions

Astrid Johana Olaya Avendano

In Nature, many vital biological processes take place across the interface formed between two dielectric media. For instance, photosynthesis and aerobic respiration involve a series of redox reactions occurring across energy-transducing membranes, in charg ...

EPFL2013

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

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

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

Steady-state macroscale voltammetry in a supercritical carbon dioxide medium

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

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

Biphasic water splitting by osmocene

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

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

Ion transfer across the water | trifluorotoluene interface

Hubert Girault, Astrid Johana Olaya Avendano, Peiyu Ge

This work introduces trifluorotoluene as an alternative organic solvent for studying charge transfer across liquid vertical bar liquid interfaces. In comparison with the most popular organic solvents in this field, 1,2-dichloroethane and nitrobenzene, trif ...

Elsevier2012

Interfacial Self-Assembly of Water-Soluble Cationic Porphyrins for the Reduction of Oxygen to Water

Hubert Girault, Astrid Johana Olaya Avendano, Pierre-François Marie Brevet

Meet at the border: Assembly of the water-soluble cobalt tetrakis(N-methylpyridinium-4-yl)porphyrin [CoTMPyP]4+ at soft interfaces is enhanced and stabilized by its interfacial interaction with the lipophilic anion (C6F5)4B−. The supramolecular structure t ...

Wiley-VCH Verlag GmbH2012

Four-electron oxygen reduction by Tetrathiafulvalene

Hubert Girault, Astrid Johana Olaya Avendano, Anne-Clémence Corminboeuf, Péter Kalman Péchy, Jérôme Florian Gonthier, Peiyu Ge

The four-electron reduction of oxygen by tetrathiafulvalene (TTF) in acidified 1,2-dichloroethane and at the acidified water/1,2-dichloroethane interface has been observed. Spectroscopy and ion transfer voltammetry results suggest that the reaction proceed ...

2011

Evaluation of Gibbs Energy of Dioxouranium Transfer at an Electrified Liquid vertical bar Liquid Interface Supported on a Microhole

Hubert Girault, Astrid Johana Olaya Avendano, Manuel Alejandro Méndez Agudelo, Thomas James Stockmann, Zhifeng Ding

Herein is reported the determination of the Gibbs energy of dioxouranium (UO22+) transfer across an interface between two immiscible electrolytic solutions (ITIES), water and 1,2-dichloroethane, that was supported at a 25 mu m diameter microhole, by means ...

2011

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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

Ultrafast Population Dynamics of Surface-Active Dyes during Electrochemically Controlled Ion Transfer across a Liquid|Liquid Interface

Hubert Girault, Astrid Johana Olaya Avendano, Pierre-François Marie Brevet, Evgeny Smirnov

Amer Chemical Soc2014

Evaluation of Gibbs Energy of Dioxouranium Transfer at an Electrified Liquid vertical bar Liquid Interface Supported on a Microhole

Hubert Girault, Astrid Johana Olaya Avendano, Manuel Alejandro Méndez Agudelo, Thomas James Stockmann, Zhifeng Ding

2011