Wojciech Adamiak

Wojciech Adamiak
Polish Academy of Sciences | PAN · Department of Electrode Processes

Dr.

About

21
Publications
5,253
Reads
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208
Citations
Additional affiliations
September 2013 - September 2013
University of Bath
Position
  • Visiting Researcher
January 2013 - present
Polish Academy of Sciences
Position
  • PostDoc Position
April 2009 - May 2009
Tyndall National Institute
Position
  • Intern
Education
May 2007 - December 2012
Polish Academy of Sciences
Field of study
  • Electrochemistry
October 2002 - March 2007
Warsaw University of Technology
Field of study
  • Chemistry

Publications

Publications (21)
Article
H 2 O 2 is a versatile chemical and can be generated by the oxygen reduction reaction in proton donor solution in molecular solvents or room temperature ionic liquids (IL). We investigated this reaction at interfaces formed by eleven hydrophobic ILs and acidic aqueous solution as a proton source with decamethylferrocene (DMFc) as an electron donor....
Article
Although many redox probes have been used for anion transfer studies in three-phase electrode setups, only a few molecules have been applied for cation transfer. In this work we show that the fullerene C 60 is an efficient redox system for this application. We performed ionophore assisted ion-transfer studies in a droplet system, a disposable setup...
Article
This paper reports light driven hydrogen evolution reaction (HER) at 1,2-dichloroethane|water (DCE|W) interface using photoexcited decamethylruthenocene (DMRc) as electron donor. DMRc is in situ regenerated by electroreduction of its oxidized form (DMRc⁺) formed during HER as a by-product. This enables continuous HER using small amount of DMRc. Pro...
Article
In this work, we explore generation-collection electrochemistry in a rotating droplet hydrodynamic system, where a 70 microliter droplet containing a redox active species (ferrocyanide) is sandwiched between an upper rotating rod and bottom nonmoving generator and collector planar electrodes. In such a system, we studied the effect of the counter e...
Article
We present a simplified and flexible implementation of the rotating droplet (RD) method as an alternative to rotating disc electrodes for electrochemical measurements in a small volume system. The rotating droplet system is based on the principle of a rotating disc electrode, but the method uses only a single droplet of the investigated solution to...
Article
Full-text available
We have investigated the compatibility of some organic solvents commonly used in electrochemistry with microfluidic channels based on poly(dimethylsiloxane) (PDMS) and compared the stability of electrochemical measurements over several hours with how much PDMS swells when immersed in these solvents. Lee et al. (Anal Chem 75: 6544–6554. doi:10.1021/...
Article
Here, we report hydrogen peroxide generation at the 2-nitrophenyloctyl ether (NPOE)/water interface with decamethylferrocene as an electron donor. The progress of this reaction was detected by the observation of a color change in the organic and aqueous phases in a series of shake-flask experiments. The shape change in cyclic voltammograms recorded...
Article
Although electron transfer reactions at liquid-liquid interfaces have been thoroughly studied in the presence of deliberately added potential determining ions or phase transfer catalysts, little is known about these reactions in the absence of the above species. Here, we report the formation of hydrogen peroxide (H2O2) in a liquid-liquid two-phase...
Article
H2O2 is produced at the interface between a room-temperature ionic liquid with decamethylferrocene as electron donor and an acidic aqueous solution. The electron donor can be regenerated electrochemically.
Article
Full-text available
Water oxidation catalysed by iridium oxide nanoparticles (IrO 2 NPs) in water–acetonitrile mixtures using [Ru III (bpy) 3 ] 3+ as oxidant was studied as a function of the water content, the acidity of the reaction media and the catalyst concentration. It was observed that under acidic conditions (HClO 4) and at high water contents (80% (v/v)) the r...
Article
Hydrogen or hydrogen peroxide can be generated in liquid-liquid biphasic systems, where teh organic phase contains suficiently strong electron donor (whose redox potential is lower than the potential of reversible hydrogen electrode). is lower than the potential of reversible hydrogen electrode). H2O2 generation with acidified aqueous phase occurs...
Article
We have investigated the oxidation of ferrocene at a flowing organic solvent|aqueous electrolyte|solid electrode junction in a microfluidic setup using cyclic voltammetry and fluorescent laser scanning confocal microscopy. At low flow rates the oxidation current decreases with increasing flow, contrary to the Levich equation, but at higher flow rat...
Article
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 only been recently studied. Here H 2 O 2 generation is studied with decamethylferrocene (DMFc) a...
Article
Voltammetry of manganese tetraphenylporphyrinato chloride in trihexyl(tetradecyl)phosphonium tris(pentafluoroe-thyl)trifluorophosphate solution in toluene reveals its unexpectedly low diffusion coefficient. UV-vis spectra confirm significant Cl À exchange with large phosphate anion at the axial position of the complex. Experiments performed with a...
Article
The laminar flow regime prevailing in pressure-driven flow through a Y-shaped microfluidic channel was utilized to create a stable boundary between two aqueous liquids. Transverse transport of ions between these two liquids gave rise to a diffusion potential, which was monitored by measurement of the open circuit potential. In this report, the infl...
Article
Electrochemical processes of fullerene C60 and decamethylferrocene dissolved in 1,2-dichlorobenzene, supported by tetrahexylammonium perchlorate, film deposited on glassy carbon electrode in contact with aqueous electrolyte was studied by cyclic voltammetry and differential pulse voltammetry. The electrode modified with decamethylferrocene solution...
Article
Electroreduction of C60 dissolved in hydrophobic solvent deposited on the electrode surface was studied. A microliter amount of C60 and tetrahexylammonium perchlorate solution in 1,2-dichlorobenzene was deposited on basal plane pyrolytic graphite electrode and this electrode was immersed into an aqueous solution. The voltammetry shows three consecu...
Article
Ion transfer across the toluene|water, toluene–ionic liquid mixture|water and ionic liquid|water boundary generated by electrochemical redox reaction of tert-butylferrocene (tBuFc) was studied with the glassy carbon (GC) electrode partially covered by the organic liquid deposit and immersed in the aqueous electrolyte solution. The electrooxidation...

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Projects

Project (1)
Project
The goal of the project is to optimize the rotating droplet system, perform experiments for electrochemical purposes and confirm obtained results in computer simulations using COMSOL Multiphysics.