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Agnieszka Kapalka

Cette personne a quitté l’EPFL

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Publications associées (22)

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Reactivity of electrogenerated free hydroxyl radicals and activation of dioxygen on boron-doped diamond electrodes

Agnieszka Kapalka

Synthetic boron-doped diamond (BDD) thin film is an electrode material with high chemical and dimensional stability, low background current and a very wide potential window of water stability. Upon anodic polarization, BDD generates hydroxyl radicals that ...

EPFL2008

Electrochemical behavior of ammonia at Ni/Ni(OH)2 electrode

Christos Comninellis, Agnieszka Kapalka

The electrochemical oxidation of ammonia was investigated on a Ni/Ni(OH)(2) electrode prepared by potential cycling of a Ni electrode in 1 M NaClO4. It was found that oxidation of ammonia is strongly pH dependent and proceeds mainly at pH values above 7. T ...

Elsevier2010

Effects of carbonate on the electrolytic removal of ammonia and urea from urine with thermally prepared IrO2 electrodes

Christos Comninellis, Agnieszka Kapalka, Véronique Amstutz

Recent studies have shown that electrolysis can be an efficient process for nitrogen removal from urine. These studies have been conducted with urea solutions or fresh urine, but urine collected in NoMix toilets and urinals has a substantially different co ...

Springer Netherlands2012

Electrochemical comparison between IrO2 prepared by thermal treatment of iridium metal and IrO2 prepared by thermal decomposition of H2IrCl6 solution

Christos Comninellis, Agnieszka Kapalka, Stéphane Fierro

The surface redox activities, the oxygen evolution reaction (OER), the oxidation of formic acid (FA) and the anodic stability have been investigated and compared on IrO2 electrodes prepared by two techniques: the thermal decomposition of H2IrCl6 precursor ...

Elsevier2010

Microelectrode-array of IrO2 prepared by thermal treatment of pure Ir

Christos Comninellis, Agnieszka Kapalka, Stéphane Fierro

In this paper, the IrO2 electrode preparation technique consisting in thermal treatment of pure Ir in air was used in order to produce an IrO2-based microelectrode-array (TOIROF-MEA) with low capacitive background current. The TOIROF-MEA was characterized ...

Elsevier2010

Ammonia oxidation to nitrogen mediated by electrogenerated active chlorine on Ti/PtOx-IrO2

Christos Comninellis, Agnieszka Kapalka

The electrochemical oxidation of ammonia (NH3 and/or NH4+) in the presence of chloride was investigated on a Ti/PtOx-IrO2 electrode. It was shown that ammonia is effectively removed from solution via electrogenerated active chlorine. Based on mass balances ...

Elsevier2010

Electrochemical behaviour of ammonia (NH4+/NH3) on electrochemically grown anodic iridium oxide film (AIROF) electrode

Christos Comninellis, Agnieszka Kapalka, Stéphane Fierro

The electrochemical behaviour of ammonia (NH4+/NH3) in sodium perchlorate at pH 9 has been investigated on electrochemically grown anodic iridium oxide film (AIROF) electrode. In base electrolyte at pH 9, the Ir(IV)/Ir(III) surface redox couple exhibits un ...

Elsevier2009

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Christos Comninellis, Rolf Wüthrich, Agnieszka Kapalka

A new, low production cost, technique for the preparation of boron-doped diamond electrodes (BDD) is presented. The technique is based on mechanical implantation of BDD particles into a titanium substrate. The electrochemical characterization of low covera ...

Elsevier2006

Enhanced ammonia oxidation on BDD induced by inhibition of oxygen evolution reaction

Christos Comninellis, Agnieszka Kapalka

Electrochemical oxidation of ammonia (NH3 and NH4+) on boron-doped diamond (BDD) electrode was studied using differential electrochemical mass-spectrometry (DEMS) and chronoamperometry. Electro-oxidation of ammonia induces inhibition of the oxygen evolutio ...

Elsevier2010

The importance of electrode material in environmental electrochemistry: Formation and reactivity of free hydroxyl radicals on boron-doped diamond electrodes

Christos Comninellis, György Foti, Agnieszka Kapalka

2009

A DEMS study of methanol and formic acid oxidation on boron-doped diamond electrode

Christos Comninellis, György Foti, Agnieszka Kapalka

The electrochemical oxidation of methanol and formic acid in 1 M HClO4 is studied on boron-doped diamond electrode using differential electrochemical mass spectrometry (DEMS). DEMS is used to identify products and intermediates of the reaction monitored on ...

2009

Agnieszka Kapalka

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Reactivity of electrogenerated free hydroxyl radicals and activation of dioxygen on boron-doped diamond electrodes

Electrochemical behavior of ammonia at Ni/Ni(OH)2 electrode

Effects of carbonate on the electrolytic removal of ammonia and urea from urine with thermally prepared IrO2 electrodes

Electrochemical comparison between IrO2 prepared by thermal treatment of iridium metal and IrO2 prepared by thermal decomposition of H2IrCl6 solution

Microelectrode-array of IrO2 prepared by thermal treatment of pure Ir

Ammonia oxidation to nitrogen mediated by electrogenerated active chlorine on Ti/PtOx-IrO2

Electrochemical behaviour of ammonia (NH4+/NH3) on electrochemically grown anodic iridium oxide film (AIROF) electrode

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Enhanced ammonia oxidation on BDD induced by inhibition of oxygen evolution reaction

The importance of electrode material in environmental electrochemistry: Formation and reactivity of free hydroxyl radicals on boron-doped diamond electrodes

A DEMS study of methanol and formic acid oxidation on boron-doped diamond electrode

Electrochemically induced mineralization of organics by molecular oxygen on boron-doped diamond electrode

Oxidation of organic pollutants on BDD anodes using modulated current electrolysis

Organic Pollutants, Direct Electrochemical Oxidation

Investigations of electrochemical oxygen transfer reaction on boron-doped diamond electrodes

Determination of the Tafel slope for oxygen evolution on boron-doped diamond electrodes

DEMS study of the acetic acid oxidation on boron-doped diamond electrode

General Concepts and Global Parameters (EOD, COD, Ox)

Basic principles of the electrochemical mineralization of organic pollutants for wastewater treatment

Advanced oxidation processes for water treatment: advances and trends for R & D