Publications associées à Pile voltaïque

Development of new volcano-shaped microelectrodes for single cell electrochemistry, electrophysiology and impedance studies

Micro- nano-electrodes have demonstrated superior performances in measuring attenuated intracellular action potentials from electrogenic cell cultures compared to traditional multi-electrode arrays. Yet, the understanding of the critical electrode features ...

EPFL2023

In-flow electrochemical detection of chemicals in droplets with pyrolysed photoresist electrodes: application as a module for quantification of microsampled dopamine

Philippe Renaud, Arnaud Bertsch, Joan Teixidor, Albert René Yvon Leroy

The electrochemical quantification of analytes in droplets of PBS separated by a fluorinated phase was investigated. PDMS-fused silica chips with pyrolysed photoresist electrodes were prepared using a simple fabrication technique and used to analyze drople ...

ROYAL SOC CHEMISTRY2021

Discrete Helmholtz model: a single layer of correlated counter-ions. Metal oxides and silica interfaces, ion-exchange and biological membranes

Hubert Girault, Grégoire Clément Gschwend

The mechanism by which interfaces in solution can be polarised depends on the nature of the charge carriers. In the case of a conductor, the charge carriers are electrons and the polarisation is homogeneous in the plane of the electrode. In the case of an ...

2020

Oxide versus Nonoxide Cathode Materials for Aqueous Zn Batteries: An Insight into the Charge Storage Mechanism and Consequences Thereof

Alfredo Pasquarello, Assil Bouzid

Aqueous Zn-ion batteries, which are being proposed as large-scale energy storage solutions because of their unparalleled safety and cost advantage, are composed of a positive host (cathode) material, a metallic zinc anode, and a mildly acidic aqueous elect ...

2019

Pyrazolium Ionic Liquid Co-catalysts for the Electroreduction of CO2

Paul Joseph Dyson, Dmitry Vasilyev, Erfan Shirzadi

Pyrazolium ionic liquids (Pz ILs) were employed as co-catalysts for electrochemical conversion of CO2 to CO on a silver disk electrode, leading to a significant decrease in the onset potential for the reduction (ca. 500 mV). The electrochemical conversion ...

2018

Electronic and structural characterization of barrier-type amorphous aluminium oxide

Alfredo Pasquarello, Patrik Schmutz, Francesco Ambrosio, Claudia Cancellieri, Raheleh Partovi Nia, Roland Hauert, Fabio Evangelisti

The structural, electronic, and dielectric properties of barrier -type anodic Al oxides prepared with various thicknesses have been investigated. The planar and cross morphologies as well as the surface charge distribution were investigated as a function o ...

Elsevier2017

Membrane electrode assembly fabricated with the combination of Pt/C and hollow shell structured-Pt-SiO2@ZrO2 sphere for self-humidifying proton exchange membrane fuel cell

Andreas Züttel, Heena Yang, Youngdon Ko

The Pt-supported hollow structured Pt-HZrO2 with the shell thickness of 27 nm is successfully synthesized. The water retention ability of Pt-HZrO2 is significantly enhanced compared with that of SiO2@ZrO2 due to the hydrophilic hollow structured HZrO2 with ...

Elsevier2017

Enhancing Mass Transport in Redox Flow Batteries by Tailoring Flow Field and Electrode Design

Christopher Raymond Dennison

In this study, we investigate the mass transport effects of various flow field designs paired with raw and laser perforated carbon paper electrodes in redox flow batteries (RFBs). Previously, we observed significant increases in peak power density and limi ...

Electrochemical Society2016

Centrifuge modelling of heating effects on energy pile performance in saturated sand

Lyesse Laloui, Chao Shi

The operation of energy pile in summer can expel excessive heat of the buildings into the ground by the use of a heat pump. Despite of having been implemented for decades, the design of energy pile still relies heavily on empiricism as there is still limit ...

National Research Council Canada2015

Screen-printed electrochemical chromium (VI) sensing electrodes for effluent bioremediation monitoring

Thomas Maeder, Caroline Jacq

Simple, low-cost and acid-resistant carbon-based screen-printed electrodes (SPEs) addressed to detection of hexavalent chromium species, Cr(VI), in sulfuric acid at pH about 1, were prepared and characterized. Working and counter electrodes were prepared j ...

Elsevier2014

Electrochemistry in Supercritical Fluids: A Mini Review

Manuel Alejandro Méndez Agudelo, Kathryn Ellen Toghill, Patrick Voyame

A brief overview of the literature relating to electrochemical studies and processes undertaken in supercritical fluids is presented. This review mostly concerns carbon dioxide and hydrofluorocarbons, given the accessibility of their supercritical states, ...

Elsevier2014

Self-Assembly of a Giant Molecular Solomon Link from 30 Subcomponents

Rosario Scopelliti, Kay Severin, Yury Tsybin, Konstantin Nagornov, Konstantin Zhurov, Clément Schouwey

The synthesis of topologically complex structures, such as links and knots, is one of the current challenges in supramolecular chemistry. The so-called Solomon link consists of two doubly interlocked rings. Despite being a rather simple link from a topolog ...

Wiley-Blackwell2014

Fundamentals and applications of electrochemistry

The Voltaic pile, invented here on Lake Como 200 years ago, was a crucial step in the development of electrical engineering. For the first time a controlled and reliable source of electric current was available. The science of electrochemistry developed ra ...

E D P Sciences2013

Improved electrode

Michael Graetzel, Nicolas Tétreault, Jérémie Minh-Châu Brillet

The present invention provides a generic electrode for photovoltaics, water splitting cells or any electro-chemical device where a three-dimensional transparent conductive backbone provides efficient charge extraction and can support an active guest materi ...

2011

Nanoporous YSZ film in electrolyte membrane of Micro-Solid Oxide Fuel Cell

Paul Muralt, Silviu Cosmin Sandu, Yan Yan, Samuel Rey-Mermet

Yttria stabilized zirconia (YSZ) with 8 mol% Y was deposited by reactive magnetron sputtering onto oxidized (100) silicon substrates. It was possible to switch film texture from (111) to (200) by applying a strong RF substrate bias. Transmission electron m ...

2010

Ageing of anode-supported solid oxide fuel cell stacks including thermal cycling, and expansion behaviour of MgO-NiO anodes

Jan Van Herle, Stefan Diethelm

This paper reports on medium term tests of anode-supported five-cell short stacks, as well as on some separate anode development. Two stacks were operated under steady-state conditions: one with unprotected metal interconnects, H-2 fuel and 0.35 A cm(-2) ( ...

Elsevier2008

Ageing of anode-supported solid oxide fuel cell stacks including thermal cycling, and expansion behaviour of MgO–NiO anodes

Jan Van Herle, Stefan Diethelm

This paper reports on medium term tests of anode-supported five-cell short stacks, as well as on some separate anode development. Two stacks were operated under steady-state conditions: one with unprotected metal interconnects, H2 fuel and 0.35Acm−2 (40% f ...

2008